Database Develop

[UNOFFICIAL][ROM]BETA LineageOS 18.1 for SM-T710 - June 10, 2023

LineageOS 18.1 UNOFFICIAL for 2015 Samsung Galaxy Tab S2 SM-T710 ONLY​Model: SM-T710 (wifi) - gts28wifi - 8" screen, Exynos 5433 SoC, no LTE
This is the ONLY model that the ROM will work on.​
There is NO ROM for the T715 or T815 in this thread. Questions about T715 or T815 will be completely IGNORED.
You MUST READ posts 1-4 (about 10 minute read) before deciding to install this rom. If you think this is an unreasonable request, then stop reading now and find another rom. Thank you.
DISCLAIMER
I am not responsible for lost data, identity theft, lost money, security vulnerabilities, bricked devices or any other hardware or software malfunctions that comes as a result of flashing this rom.
All involved in bringing this build to you are working voluntarily on it in very limited spare time, and their other life commitments have much higher priority. Don't expect a prompt, or even any, response to questions and bug reports.
Before attempting to install this ROM
1. Ask yourself: would bricking your device be a disaster for you? If yes, don't try this ROM! It can't be guaranteed stable and reliable enough to depend on for daily use.
2. BACKUP YOUR DATA AND EXISTING ROM. Be prepared for a complete restore if anything goes wrong.
3. RESEARCH adb, fastboot, Odin/heimdall, and TWRP and how to use them, if not already familiar with these.
What works
1. bluetooth
2. wifi
3. brightness
4. external audio
5. GPS
6. audio through headphone jack
7. audio over bluetooth
8. selinux enforcing
9. DRM level 3 (SD definition)
10. deep sleep
What doesn't work
1. fingerprint. As I wrote in post 1891 at
https://forum.xda-developers.com/t/...t810-t815-t815y.3879302/page-95#post-85533725
I will not spend anymore time looking at fingerprint. If you need fingerpint to work, stay with stock Samsung rom.
2. DRM level 1 (no HD definition). There's more detail in post 1891 above. I will not be trying to achieve level 1 for HD definition. If you need HD definition for your $treaming media, stay with stock Samsung rom.
3. If you charge the device while it's powered off and then want to power it on, you MUST wait at least 30 seconds AFTER disconnecting the charger cable before pressing the power button otherwise you might run into strange boot problems such as the touch screen not working.
4. Possibly other features that I haven't tested or do not use.
Source Code
See FAQ 1 for links in post #2.
Thanks
1. LineageOS team for source code.
2. @retiredtab, @ananjaser1211, @lpedia, @Yogi555 and @CuckooPenguin for spending nearing 1 month fixing the 2 most biggest bugs in 17.1 that plagued users for nearly 10 months: the wifi instability and random reboots. These are discussed in detail at
https://forum.xda-developers.com/t/...rs-running-any-version-of-android-10.4308193/
https://forum.xda-developers.com/t/...rs-running-any-version-of-android-10.4308203/
3. All past contributors of the exynos5433 code.
4. @rINanDO for his lmkd spam fix in 18.1.
5. beta testers: lpedia, Yogi555 and CuckooPenguin
6. lpedia for building the public T710 monthly roms starting April 2022
7. lpedia for suggestions, proof reading and FAQ table format in post #2.

Frequently Asked Questions. You MUST READ this before posting any questions. Thank you.
QuestionAnswerQ1. Can I build this ROM for myself? Where are the source and kernel source files?A1. Yes, you can. The source files are listed below.
Kernel
https://github.com/retiredtab/android_kernel_samsung_universal5433-selinux
Device Tree
https://github.com/retiredtab/android_device_samsung_gts2-common-selinux
https://github.com/retiredtab/android_device_samsung_gts28wifi
Vendor
https://github.com/retiredtab/proprietary_vendor_samsung-selinux
In addition, there is a repo diff file for device-specific tweaks needed to work and a roomservice.xml (local manifest file) file so you can build this rom yourself. The other patch required for tcp/ip is at https://github.com/DerpFest-11/pack...mmit/22fd53a977eeaf4e36be7bf6358ecf2c2737fa5eQ2. Is this ROM suitable as a daily driver?A2. It might be, depending on your requirements. You would need to try it yourself, with your preferred apps, to see if suits your purposes. I've been using it myself since mid August 2021 with no major issues.Q3. What do I do if my app xyz doesn't work?A3. I can't help diagnose problems with random apps I know nothing about. If the app is critically important to you and it doesn't work on this ROM, go back to a ROM where it did work.Q4. Why is this ROM laggy and/or buggy?A4. The device will be noticeably slower if you're using any Gapps package. Consider going gapps-free. A lot of apps will work without Google's services, or there exist alternatives that will. Check out F-Droid, Aurora Store, NewPipe, etc.Q5. What TWRP should I use?A5. You MUST use my unofficial TWRP 3.5.2_9. Get it from
https://sourceforge.net/projects/retiredtab/files/SM-T710/TWRP/Q6. Why should I use this ROM?A6. You don't have to! If you don't like it, go back to your old ROM.Q7. Will you offer monthly updates with security patches?A7. We plan to do so. lpedia will try to update the ROM with the monthly security patches after LineageOS has released them, free time permitting. Each monthly build will be tested to make sure all the "What's working" functionality listed in post #1 still works, before it's made available (which might in some cases delay the release).Q8. I'm a newbie. Can you provide step by step instructions?A8. We simply don't have the time to do this, but there are lots of tutorials, videos, etc online showing how to flash custom ROMs and how to deal with common problems. Newbie questions are also accepted in the XDA General Questions and Answers forum. Having said that, @pflyaz has kindly make a guide in post #37.Q9. Can I report a bug with respect to the ROM?A9. Yes, but you need to supply the following information. If you don't, I won't look at it.
Provide an adb logcat of the problem, and if possible describe how to reproduce it. Note that I can't help if it involves downloading any app I don't already use that requires payment or creating a userid/password.
To get a logcat, open a terminal window on your PC, connect your device to it via USB, and do this:
Bash:
# clear the logcat first
adb logcat -c
# start logcat trace
adb logcat > problem.txt
# reproduce problem
# wait until problem has occurred,
# then stop trace by hitting ctrl-c then zip the problem.txt file
# before uploading it.
Q10. How long will you build 18.1 for this device?A10. For now, 18.1 will be built for all of 2022. After that, we will make a decision depending on a number of factors.Q11. Do I need to erase everything and format my data before installing this ROM for the first time?A11. Under most circumstances, yes.
If you're coming from stock Samsung Android, or an earlier version of LineageOS, or a different custom ROM, you MUST 'clean flash': boot to TWRP recovery, wipe system, data, dalvik/art cache, and cache partitions, then Format Data, then install this ROM.
If you don't do this you're likely to run into problems, such as getting stuck at the boot animation for more than 5 minutes.
The ONLY exception is that if you are coming from LOS 18.1 with the April 5 2022 security patch or later, you can dirty flash the latest security patch build.Q12. What Gapps should I use?A12. Your choice! There are several well-known Gapps packages, such as NikGapps, BiTGapps, OpenGapps, and MindTheGapps. OpenGapps is being removed as per post #11. Do your own research as to what is the most reliable gapps option for you.
I recommend installing the SMALLEST version of any of these, preferably with just the minimum Google services needed to access the Play Store and run apps that depend on Google services.
You could also consider Google alternatives, such as Aurora Store, which mirrors the Google Play Store apps but doesn't need any Google services itself. Many Play Store apps do not actually depend on Google services.
If you are going to install any Gapps package, follow the installation instructions given for that particular package.Q13. I'm having problems with Gapps. Can you tell me why it's not working?A13. I can't answer any questions about Gapps, because I don't use them. Ask your questions on the XDA thread for the Gapps package you're using.Q14. Why isn't my post answered?A14. There are several possible reasons: the question is answered in the FAQ (in which case it will be ignored completely); or it involves apps or operating systems that I don't use; or it's about Gapps, which I don't use; or I simply have not had time to answer any questions.Q15. What speed up/optimization tips do you suggest?A15. These steps can make a big difference to performance:
Turn off animations. Go to Settings > System > Developer options, scroll down to the Drawing section, and set Window, Transition and Animator scale all to "Animation off".
Don't install Gapps unless you depend on something that only Google is providing. Use Aurora Store to get your preferred Play Store apps - they will all be available on Aurora Store. You can choose to access this anonymously or use a Google account.
Don't run more than two apps at the same time. You can probably listen to music in the background and use a web browser at the same time.
Use a web browser with built-in adblock and privacy features, such as Brave.
Use NewPipe to watch your streaming content. It has built in adblock so you don't have to watch forced ads.
Look for apps that are open source, ad-free and lightweight.
Q16. Does this ROM support Magisk so I can root my device?A16. Magisk works with this ROM as reported by beta testsers, but that could change with any revision and changes by Google. However I don't use it myself and can't help with any related issues. Direct any questions about Magisk to the XDA Magisk forum.Q17. Will this ROM ever become official?A17. Never. Official maintainers have onerous responsibilities, and I know my device trees, code organization and git commits will NOT meet LineageOS standards. I'm not able or willing to take on the responsibilities and commit the extra time to supporting an official build.Q18. What is the difference between this ROM and others?A18. This ROM tries to be pure LineageOS with little or no modification. Other ROMs may come with a different UI, different bundled apps, etc.Q19. Will there be any major 18.1 code modifications in the future?A19. I don't anticipate any major modifications. There may be some slight tweaking to the SEpolicy, small bug fixes and minor code cleanup, but all the hard work - getting the rom up and running, and fixing all the major bugs - has been done. This doesn't mean the code is perfect or well organized, but I won't be making any major changes.Q20. Why did you fork the trees?A20. I wanted my own private branch where I could make changes that would only affect my own personal builds.Q21. Can you build a variant of this device? For example, a LTE or S-pen version?A21. I cannot and will not try to build for a variant device if I don't physically have that device. I have to be able to boot and test it myself, and there's no guarantee that I can get those variant features working. So I will NEVER build T715, T810 and T815.Q22. Can I load this ROM on a variant device like LTE or S-pen version?A22. This ROM is for the device explicitly listed and will only work on that device. Do not try to install it on any other device.
ONLY if you are an advanced user and understand TWRP, adb, odin, heimdall, etc, you could try loading it on a LTE or S-pen variant by modifying the updater-script, but be warned: there are likely to be problems, including a bricked device, bootloops, or the ROM not being able to support the functionality of LTE/S-pen.Q23. Does this ROM have any wifi connection issues?A23. This ROM's wifi has been stable on the specified device ever since lpedia and I determined the root cause of the wifi problems back in July 2021 and re-installed the original S2 network 'blobs' with LOS 17.1.Q24. Is this ROM secure so I can do financial transactions?A24. Although Android monthly security patches do improve general security, this ROM's outdated kernel and old proprietary vendor blobs/drivers will NEVER get updates of any kind, and could have significant security holes.
In addition, although the ROM is SElinux enforcing, there's a good chance that the rules written (about 800+ lines of code) have some errors.
If the device is rooted, this would further weaken the security.
With this information, it's up to you to make an informed decision about whether you trust this ROM to be secure enough for your financial transactions.Q25. Okay, I understand the consequences and willing to take the risks outlined, now where can I find the BETA rom?A25. Downloads are at
https://sourceforge.net/projects/lpedia-sf/files/gts28wifi/

Monthly release notes
June 10, 2023 release notes
1. Incorporates June 5 as per https://review.lineageos.org/q/topic:R_asb_2023-06
May 8, 2023 release notes
1. Incorporates May 5 as per https://review.lineageos.org/q/topic:R_asb_2023-05
Apr 18, 2023 release notes
1. Incorporates Apr 5 as per https://review.lineageos.org/q/topic:R_asb_2023-04
March 19, 2023 release notes
1. Incorporates Feb 5 and Mar 5 security patches as per https://review.lineageos.org/q/topic:R_asb_2023-02 and https://review.lineageos.org/q/topic:R_asb_2023-03
Jan 8, 2023 release notes
1. Incorporates Jan 5 security patches as per https://review.lineageos.org/q/topic:R_asb_2023-01
Dec 12 release notes
1. Incorporates Dec 5 security patches as per https://review.lineageos.org/q/topic:R_asb_2022-12
Nov 12 release notes
1. Incorporates Nov 5 security patches as per https://review.lineageos.org/q/topic:R_asb_2022-11
Oct 9 release notes
1. Incorporates Oct 5 security patches as per https://review.lineageos.org/q/topic:R_asb_2022-10
Sept 11 release notes
1. Incorporates Sept 5 security patches as per https://review.lineageos.org/q/topic:R_asb_2022-09
2. Fixes non working touchscreen and hardware buttons when powering up with power cable plugged in and device turned off. However, the recommendation is still to unplug your charger, wait 30 seconds before pressing power button when your device is turned off.
https://github.com/retiredtab/andro...mmit/7e0657629efedc7f06f6f6fb57199fca0b4e8ea6
https://github.com/retiredtab/andro...mmit/e17c44d2e282d67b243a1c99ce62127e83052c4f
3. Removed settings menu option for fast charging. S2 tablet devices do not support this.
https://github.com/retiredtab/andro...mmit/6db8e690141a98e5cf9e6952c3572c127c0cf8ea
Aug 10 release notes
1. Incorporates Aug 5 security patches as per https://review.lineageos.org/q/topic:R_asb_2022-08
2. Fixes saving of color profile in live display during a reboot/shutdown.
https://github.com/retiredtab/andro...mmit/01b1ed6ba8c268a19762031415fde1b4e45d4ac3
3. Fixes offline battery charging by writing rules to allow charger to access certain files. This removes the previous workaround. Thanks to @simon-edwards for providing an adb logcat that showed the denials.
https://github.com/retiredtab/andro...mmit/041ae45960170e68410b059f4f709e9c14b79a99
July 23, 2022
1. Added argosd to improve wifi throughput as per https://github.com/retiredtab/andro...mmit/c181aa0c5192e46a5a03d4451e2648481a520c0f
2. Incorporates July 5th security patches as per https://review.lineageos.org/q/topic:R_asb_2022-07
3. Incorporates a workaround for offline charging.
https://github.com/retiredtab/andro...mmit/9d019f0a3be789850a9add18d042990631f05b44
Previously, if the device was off and you plugged in a charger, it would show a battery icon and this would display indefinitely giving no sign of charging animation. With this workaround, the battery icon is displayed for a few seconds and then a white circle with a charge symbol inside it is shown to indicate it's charging.
After a few seconds, the screen will go blank and continue charging. The side effect of this workaround is that in order to turn on the device, you first must unplug the charger and then turn on your device. If you try to turn on the device with the charger cable plugged in, it won't turn on.
June 12, 2022
1. Removed vibrator code from gts2-common as wifi only models don't have vibrator motor (only LTE models).
https://github.com/retiredtab/andro...mmit/e54aee73a98e3cef6e74f96c1815cec9c82ff10d
https://github.com/retiredtab/andro...mmit/dd846b06378182398c55b57b2edc2537369bd509
2. Incorporates June 5th security patches as per https://review.lineageos.org/q/topic:R_asb_2022-06
May 12, 2022
1. Added overlay for led capacitive led buttons as per https://github.com/retiredtab/andro...mmit/83551570e4627a0e353e358787f83aa65484b528
2. Incorporates May 5th security patches as per https://review.lineageos.org/q/topic:R_asb_2022-05
April 11, 2022
1. YOU MUST read posts 1-4 if you haven't already
2. First public BETA release of selinux enforcing T710 build.
3. Incorporates April 5th security patches as per https://review.lineageos.org/q/topic:R_asb_2022-04
4. BACKUP your data because YOU MUST wipe dalvik/cache, cache, system, data and internal storage partitions in TWRP and FORMAT DATA after as this is the first release of this build. You cannot dirty flash at all. See FAQ.

Reserved.

Initial public build called lineage-18.1-20220411-UNOFFICIAL-gts28wifi.zip. The sha256sum file is provided as well to ensure integrity of download.
lpedia has tested all the functionality as to what works as per post #1 before uploading the build. Having said that, there's still a chance it won't work on your device due to human error, your configuration, your apps, etc. If it won't boot, always start with a complete wipe of everything and format your data. This is known has a clean install. Backup your data before a clean install.
April 11, 2022
1. YOU MUST read posts 1-4 if you haven't already
2. First public BETA release of selinux enforcing T710 build.
3. Incorporates April 5th security patches as per https://review.lineageos.org/q/topic:R_asb_2022-04
4. BACKUP your data because YOU MUST wipe dalvik/cache, cache, system, data and internal storage partitions in TWRP and FORMAT DATA after as this is the first release of this build. You cannot dirty flash at all. See FAQ Q11.

Congratulations on the awesome release!

New build called lineage-18.1-20220512-UNOFFICIAL-gts28wifi.zip
lpedia has tested all the functionality as to what works as per post #1 before uploading the build. Having said that, there's still a chance it won't work on your device due to human error, your configuration, your apps, etc. If it won't boot, always start with a complete wipe of everything and format your data. This is known has a clean install. Backup your data before a clean install.
May 12, 2022 release notes
1. YOU MUST read posts 1-4 if you haven't already
2. Added overlay for led capacitive led buttons as per https://github.com/retiredtab/andro...mmit/83551570e4627a0e353e358787f83aa65484b528
3. Incorporates May 5th security patches as per https://review.lineageos.org/q/topic:R_asb_2022-05
4. If you are upgrading from the April 11 build, you may dirty flash the May 10 build. If you are NOT coming from the April 11th, 2022 build, you MUST BACKUP your data because YOU MUST wipe dalvik/cache, cache, system, data and internal storage partitions in TWRP and FORMAT DATA. You cannot dirty flash at all. See FAQ Q11.

Hi there, thanks for your ROM. I would like to report a bug with using it.
May 12, 2022 release "lineage-18.1-20220512-UNOFFICIAL-gts28wifi" with "open_gapps-arm-11.0-pico-20220503".
All factory resetted through TWRP, after flashing and booting the device it is stuck on "Just a sec..." when selecting set up offlie. If you try to set it up over wifi it is stuck on "Getting your tablet ready."
I've included my logcat, if you need more info or another reproduction please let me know.
Thanks!
Kim

kimrosebush said:
Hi there, thanks for your ROM. I would like to report a bug with using it.
May 12, 2022 release "lineage-18.1-20220512-UNOFFICIAL-gts28wifi" with "open_gapps-arm-11.0-pico-20220503".
All factory resetted through TWRP, after flashing and booting the device it is stuck on "Just a sec..." when selecting set up offlie. If you try to set it up over wifi it is stuck on "Getting your tablet ready."
I've included my logcat, if you need more info or another reproduction please let me know.
Thanks!
Kim
Click to expand...
Click to collapse
Hi, @kimrosebush. Thank you for sending a logcat.
This kind of problem is often because the gapps package isn't quite right for some reason. Google Setup needs the underlying Google Play services to be present and working properly. This line from your logcat suggests they are not:
Code:
05-12 22:29:54.077 4147 4225 W GooglePlayServicesUtil: com.google.android.setupwizard requires Google Play services, but they are missing.
A few questions about the process you followed:
1. What OS was on the T710 before you began? If it was stock Android, was it the latest version available?
2. Did you install the correct version of TWRP (see Q5 in the FAQ)?
3. When you say "All factory resetted through TWRP", what did you actually do?
4. When did you install the gapps package? Just after the ROM, before first boot?
Have you checked whether everything else is working? In particular, is wifi connecting and working properly? [Pressing the Home button should get you out of the stuck Google Setup.]

lpedia said:
Hi, @kimrosebush. Thank you for sending a logcat.
This kind of problem is often because the gapps package isn't quite right for some reason. Google Setup needs the underlying Google Play services to be present and working properly. This line from your logcat suggests they are not:
Code:
05-12 22:29:54.077 4147 4225 W GooglePlayServicesUtil: com.google.android.setupwizard requires Google Play services, but they are missing.
A few questions about the process you followed:
1. What OS was on the T710 before you began? If it was stock Android, was it the latest version available?
2. Did you install the correct version of TWRP (see Q5 in the FAQ)?
3. When you say "All factory resetted through TWRP", what did you actually do?
4. When did you install the gapps package? Just after the ROM, before first boot?
Have you checked whether everything else is working? In particular, is wifi connecting and working properly? [Pressing the Home button should get you out of the stuck Google Setup.]
Click to expand...
Click to collapse
Hey @lpedia thanks for the reply.
1. LineageOS 17.1 I believe was the build.
2. Yes I installed the provided version.
3. I formatted all partitions except SD, flashed the images and then formatted the SD to ensure a completely wiped device.
4. Just after the ROM.
I tried a few times further, then I decided to go for the 'full' OpenGApps package; once I used this one and attempted the offline setup again I was able to proceed further in configuring the tablet.
Thanks for the hint in the right direction. Am glad to be on Android 11 now.
Kind Regards,
Kim

I will be removing opengapps from the FAQ because for several months now (starting around Oct 2021), the opengapps project has been releasing UNTESTED builds that results in bootloops or non working gapps services. Despite numerous requests/posts from the community to slow down the releases and actually TEST THEM BEFORE release, the latest May 3, 2022 shows there is still room for improvement.
This thread in the opengapps forum is just the latest example. Details of UNTESTED builds are also in the same megathread below.
https://forum.xda-developers.com/t/...rsions-devices.3098071/page-367#post-86885091
It's also shown up in other roms like
https://forum.xda-developers.com/t/...7-1-04-30-2022.3937956/page-100#post-86885353
This would be a good time for user to do their own research on which gapps is best for them or use NONE at all. I use Aurora Store myself.
Just a reminder that the builds we release are TESTED and verified to have all the functionality as listed in post #1.

kimrosebush said:
Hey @lpedia thanks for the reply.
1. LineageOS 17.1 I believe was the build.
2. Yes I installed the provided version.
3. I formatted all partitions except SD, flashed the images and then formatted the SD to ensure a completely wiped device.
4. Just after the ROM.
I tried a few times further, then I decided to go for the 'full' OpenGApps package; once I used this one and attempted the offline setup again I was able to proceed further in configuring the tablet.
Thanks for the hint in the right direction. Am glad to be on Android 11 now.
Kind Regards,
Kim
Click to expand...
Click to collapse
Good to hear!
Note that you don't have to be quite so brutal about wiping absolutely everything for a 'clean' flash. I manually wipe Dalvik / ART Cache, Cache, and System, and then Format Data. I have never reformatted the SD.
If you have any further trouble, I suggest you try starting again with a clean flash and a different gapps package, or try doing without any gapps, as @retiredtab has recommended in the post above.
In my experience, some gapps packages, or sometimes just a particular version of a gapps package, don't work with some ROMs. I have not tried opengapps, but I can confirm that BiTGApps-arm-11.0.0-R45_signed.zip does work on my T710 with this particular ROM version.
I personally like BiTGapps because it installs only the bare minimum needed (Google services and Play Store; doesn't even automatically run Google Setup) and doesn't have to be installed before first boot. So it's possible to install LOS, boot the system, make sure everything's working, then go back into TWRP and install gapps. If any problems turn up, this approach also makes it easier to tell whether it's something to do with LOS or with gapps.
You could also try running LOS without any gapps, and if you decide you want gapps after all, install BiTGapps without having to clean-flash and start again.

I just installed this rom two days ago. It has been working great. Today, however, I noticed that Trust gave me a message about the build having public keys. Yesterday, I don't recall getting that message. Also, root checker says "root access is not properly installed." The last time I checked, it was not rooted. Finally, my CRAVE (a Canadian streaming service) app won't play videos but gives a "device is rooted" message. Netflix works however.
Would you have any idea what is going on or how I should deal with this?
Thanks,
MC

Dr_MC said:
Today, however, I noticed that Trust gave me a message about the build having public keys. Yesterday, I don't recall getting that message.
Click to expand...
Click to collapse
On April 6, @lpedia and I had a PM discussion about signing builds.
lpedia wrote
Code:
"About signing builds ... an issue with just using the default test-keys signature is that someone can easily create
their own builds and pass them off as someone else's, possibly adding malicious or just plain bad code, and their
package would look just like the original."
I replied
Code:
"For our purposes, maybe we should just include the sha256sum and recommend that the users verify
them to ensure the file downloaded correctly and it wasn't modified?"
To get stop seeing that trust message, goto settings, privacy, trust, turn off build signature.
Dr_MC said:
Also, root checker says "root access is not properly installed." The last time I checked, it was not rooted. Finally, my CRAVE (a Canadian streaming service) app won't play videos but gives a "device is rooted" message. Netflix works however.
Click to expand...
Click to collapse
I can't see the Crave app in Aurora Store. I use the app devcheck to check for root access and the screenshot clearly shows it's not rooted.
There's nothing in my code to enable root. In fact, I don't even want root on my devices.
For Crave, you can try using Magisk and it's hide root function to see if that will fool Crave into thinking the device is not rooted.

Dr_MC said:
Also, root checker says "root access is not properly installed." The last time I checked, it was not rooted.
Click to expand...
Click to collapse
I did installed the above root checker app and got the same message. That is, the T710 rom, by default is NOT rooted. I don't know why Crave would say it's rooted.
I believe root checker's main function is to verify that your rom is "rooted" so when it says "root access is not properly installed.", it's trying to tell you that your attempt to use Magisk or similar type app to root the rom was unsuccessful.
BTW, you are better off using devcheck as it's an excellent ad-free utility that I use on a regular basis to help develop this rom vs the ad-infested root checker app. While devcheck isn't open source, it's written by flar2 who is a xda member here.

Dr_MC said:
Also, root checker says "root access is not properly installed." The last time I checked, it was not rooted.
Click to expand...
Click to collapse
Root Checker Basic says "Sorry! Root access is not properly installed on this device" when asked to confirm root status on an unrooted device. So as far as that app's concerned, it just means "I can't confirm it's rooted". Which is to be expected if it isn't rooted and you haven't even tried to root it.
If that isn't the app you're using, see if you can find out what it means to your particular root-checker app.
Dr_MC said:
Finally, my CRAVE (a Canadian streaming service) app won't play videos but gives a "device is rooted" message. Netflix works however.
Click to expand...
Click to collapse
Did the CRAVE app work on this device when it had the stock Samsung ROM? Do you have to register devices to receive this service? If so, might it need to be re-registered? Because its device ID will have changed.

Thanks for suggesting devcheck. It says I'm unrooted. Perhaps Crave noticed the unlocked bootloader or the custom ROM.

It did work with stock. It was registered, twice in fact. I deleted both, registered it again. The ap still says I'm rooted. Oh well, that's ok, I can use crave through a browser.
BTW do you know where I can find the stock keyboard?
Thanks

Dr_MC said:
BTW do you know where I can find the stock keyboard?
Click to expand...
Click to collapse
If you mean the Samsung keyboard - sorry, no, I don't. I switched to a different keyboard years ago. Google's GBoard has similar functionality, I think. MS SwiftKey is OK, too - has the best (most relevant) suggested text of any of the keyboards I've tried.

ROM working fine for me after trial and error with various gapps. FWIW I ran into the "just a sec " with opengapps. I finally had some joy by flashing the rom, but not gapps. Boot the ROM and completely setup it up Lineage. Then I restarted and flashed open gapps. When I rebooted everything came uo fine and has been solid eversince. Kudos your you gentlemen for fixing the Wifi ! Its been nice to have it work stably.

[UNOFFICIAL][ROM]BETA LineageOS 18.1 for SM-T810 - June 9, 2023

LineageOS 18.1 UNOFFICIAL for 2015 Samsung Galaxy Tab S2 SM-T810 ONLY​Model: SM-T810 (wifi) - gts210wifi - 9.7" screen, Exynos 5433 SoC, no LTE
This is the ONLY model that the ROM will work on.​
There is NO ROM for the T715 or T815 in this thread. Questions about T715 or T815 will be completely IGNORED.
You MUST READ posts 1-4 (about 10 minute read) before deciding to install this rom. If you think this is an unreasonable request, then stop reading now and find another rom. Thank you.
DISCLAIMER
I am not responsible for lost data, identity theft, lost money, security vulnerabilities, bricked devices or any other hardware or software malfunctions that comes as a result of flashing this rom.
All involved in bringing this build to you are working voluntarily on it in very limited spare time, and their other life commitments have much higher priority. Don't expect a prompt, or even any, response to questions and bug reports.
Before attempting to install this ROM
1. Ask yourself: would bricking your device be a disaster for you? If yes, don't try this ROM! It can't be guaranteed stable and reliable enough to depend on for daily use.
2. BACKUP YOUR DATA AND EXISTING ROM. Be prepared for a complete restore if anything goes wrong.
3. RESEARCH adb, fastboot, Odin/heimdall, and TWRP and how to use them, if not already familiar with these.
What works
1. bluetooth
2. wifi
3. brightness
4. external audio
5. GPS
6. audio through headphone jack
7. audio over bluetooth
8. selinux enforcing
9. DRM level 3 (SD definition)
10. deep sleep
What doesn't work
1. fingerprint. As I wrote in post 1891 at
https://forum.xda-developers.com/t/...t810-t815-t815y.3879302/page-95#post-85533725
I will not spend anymore time looking at fingerprint. If you need fingerpint to work, stay with stock Samsung rom.
2. DRM level 1 (no HD definition). There's more detail in post 1891 above. I will not be trying to achieve level 1 for HD definition. If you need HD definition for your $treaming media, stay with stock Samsung rom.
3. If you charge the device while it's powered off and then want to power it on, you MUST wait at least 30 seconds AFTER disconnecting the charger cable before pressing the power button otherwise you might run into strange boot problems such as the touch screen not working.
4. Possibly other features that I haven't tested or do not use.
Source Code
See FAQ 1 for links in post #2.
Thanks
1. LineageOS team for source code.
2. @retiredtab, @ananjaser1211, @lpedia, @Yogi555 and @CuckooPenguin for spending nearing 1 month fixing the 2 most biggest bugs in 17.1 that plagued users for nearly 10 months: the wifi instability and random reboots. These are discussed in detail at
https://forum.xda-developers.com/t/...rs-running-any-version-of-android-10.4308193/
https://forum.xda-developers.com/t/...rs-running-any-version-of-android-10.4308203/
3. All past contributors of the exynos5433 code.
4. @rINanDO for his lmkd spam fix in 18.1.
5. beta testers: lpedia, Yogi555 and CuckooPenguin
6. Yogi555 for building the public T810 monthly roms starting April 2022
7. lpedia for suggestions, proof reading and FAQ table format in post #2.

Frequently Asked Questions. You MUST READ this before posting any questions. Thank you.
QuestionAnswerQ1. Can I build this ROM for myself? Where are the source and kernel source files?A1. Yes, you can. The source files are listed below.
Kernel
https://github.com/retiredtab/android_kernel_samsung_universal5433-selinux
Device Tree
https://github.com/retiredtab/android_device_samsung_gts2-common-selinux
https://github.com/retiredtab/android_device_samsung_gts210wifi
Vendor
https://github.com/retiredtab/proprietary_vendor_samsung-selinux
In addition, there is a repo diff file for device-specific tweaks needed to work and a roomservice.xml (local manifest file) file so you can build this rom yourself. The other patch required for tcp/ip is at https://github.com/DerpFest-11/pack...mmit/22fd53a977eeaf4e36be7bf6358ecf2c2737fa5eQ2. Is this ROM suitable as a daily driver?A2. It might be, depending on your requirements. You would need to try it yourself, with your preferred apps, to see if suits your purposes. I've been using it myself since mid August 2021 with no major issues.Q3. What do I do if my app xyz doesn't work?A3. I can't help diagnose problems with random apps I know nothing about. If the app is critically important to you and it doesn't work on this ROM, go back to a ROM where it did work.Q4. Why is this ROM laggy and/or buggy?A4. The device will be noticeably slower if you're using any Gapps package. Consider going gapps-free. A lot of apps will work without Google's services, or there exist alternatives that will. Check out F-Droid, Aurora Store, NewPipe, etc.Q5. What TWRP should I use?A5. You MUST use TWRP 3.5.2_9. Get it from
https://dl.twrp.me/gts210wifi/Q6. Why should I use this ROM?A6. You don't have to! If you don't like it, go back to your old ROM.Q7. Will you offer monthly updates with security patches?A7. We plan to do so. Yogi555 will try to update the ROM with the monthly security patches after LineageOS has released them, free time permitting. Each monthly build will be tested to make sure all the "What works" functionality listed in post #1 still works, before it's made available (which might in some cases delay the release).Q8. I'm a newbie. Can you provide step by step instructions?A8. We simply don't have the time to do this, but there are lots of tutorials, videos, etc online showing how to flash custom ROMs and how to deal with common problems. Newbie questions are also accepted in the XDA General Questions and Answers forum. Having said that, @pflyaz has kindly make a guide in in post #16.Q9. Can I report a bug with respect to the ROM?A9. Yes, but you need to supply the following information. If you don't, I won't look at it.
Provide an adb logcat of the problem, and if possible describe how to reproduce it. Note that I can't help if it involves downloading any app I don't already use that requires payment or creating a userid/password.
To get a logcat, open a terminal window on your PC, connect your device to it via USB, and do this:
Bash:
# clear the logcat first
adb logcat -c
# start logcat trace
adb logcat > problem.txt
# reproduce problem
# wait until problem has occurred,
# then stop trace by hitting ctrl-c then zip the problem.txt file
# before uploading it.
Q10. How long will you build 18.1 for this device?A10. For now, 18.1 will be built for all of 2022. After that, we will make a decision depending on a number of factors.Q11. Do I need to erase everything and format my data before installing this ROM for the first time?A11. Under most circumstances, yes.
If you're coming from stock Samsung Android, or an earlier version of LineageOS, or a different custom ROM, you MUST 'clean flash': boot to TWRP recovery, wipe system, data, dalvik/art cache, and cache partitions, then Format Data, then install this ROM.
If you don't do this you're likely to run into problems, such as getting stuck at the boot animation for more than 5 minutes.
The ONLY exception is that if you are coming from LOS 18.1 with the April 5 2022 security patch or later, you can dirty flash the latest security patch build.Q12. What Gapps should I use?A12. Your choice! There are several well-known Gapps packages, such as NikGapps, BiTGapps, OpenGapps, and MindTheGapps. OpenGapps is being removed as per post #14. Do your own research as to what is the most reliable gapps option for you.
I recommend installing the SMALLEST version of any of these, preferably with just the minimum Google services needed to access the Play Store and run apps that depend on Google services.
You could also consider Google alternatives, such as Aurora Store, which mirrors the Google Play Store apps but doesn't need any Google services itself. Many Play Store apps do not actually depend on Google services.
If you are going to install any Gapps package, follow the installation instructions given for that particular package.Q13. I'm having problems with Gapps. Can you tell me why it's not working?A13. I can't answer any questions about Gapps, because I don't use them. Ask your questions on the XDA thread for the Gapps package you're using.Q14. Why isn't my post answered?A14. There are several possible reasons: the question is answered in the FAQ (in which case it will be ignored completely); or it involves apps or operating systems that I don't use; or it's about Gapps, which I don't use; or I simply have not had time to answer any questions.Q15. What speed up/optimization tips do you suggest?A15. These steps can make a big difference to performance:
Turn off animations. Go to Settings > System > Developer options, scroll down to the Drawing section, and set Window, Transition and Animator scale all to "Animation off".
Don't install Gapps unless you depend on something that only Google is providing. Use Aurora Store to get your preferred Play Store apps - they will all be available on Aurora Store. You can choose to access this anonymously or use a Google account.
Don't run more than two apps at the same time. You can probably listen to music in the background and use a web browser at the same time.
Use a web browser with built-in adblock and privacy features, such as Brave.
Use NewPipe to watch your streaming content. It has built in adblock so you don't have to watch forced ads.
Look for apps that are open source, ad-free and lightweight.
Q16. Does this ROM support Magisk so I can root my device?A16. Magisk works with this ROM as reported by beta testsers, but that could change with any revision and changes by Google. However I don't use it myself and can't help with any related issues. Direct any questions about Magisk to the XDA Magisk forum.Q17. Will this ROM ever become official?A17. Never. Official maintainers have onerous responsibilities, and I know my device trees, code organization and git commits will NOT meet LineageOS standards. I'm not able or willing to take on the responsibilities and commit the extra time to supporting an official build.Q18. What is the difference between this ROM and others?A18. This ROM tries to be pure LineageOS with little or no modification. Other ROMs may come with a different UI, different bundled apps, etc.Q19. Will there be any major 18.1 code modifications in the future?A19. I don't anticipate any major modifications. There may be some slight tweaking to the SEpolicy, small bug fixes and minor code cleanup, but all the hard work - getting the rom up and running, and fixing all the major bugs - has been done. This doesn't mean the code is perfect or well organized, but I won't be making any major changes.Q20. Why did you fork the trees?A20. I wanted my own private branch where I could make changes that would only affect my own personal builds.Q21. Can you build a variant of this device? For example, a LTE or S-pen version?A21. I cannot and will not try to build for a variant device if I don't physically have that device. I have to be able to boot and test it myself, and there's no guarantee that I can get those variant features working. So I will NEVER build T715, T810 and T815.Q22. Can I load this ROM on a variant device like LTE or S-pen version?A22. This ROM is for the device explicitly listed and will only work on that device. Do not try to install it on any other device.
ONLY if you are an advanced user and understand TWRP, adb, odin, heimdall, etc, you could try loading it on a LTE or S-pen variant by modifying the updater-script, but be warned: there are likely to be problems, including a bricked device, bootloops, or the ROM not being able to support the functionality of LTE/S-pen.Q23. Does this ROM have any wifi connection issues?A23. This ROM's wifi has been stable on the specified device ever since lpedia and I determined the root cause of the wifi problems back in July 2021 and re-installed the original S2 network 'blobs' with LOS 17.1.Q24. Is this ROM secure so I can do financial transactions?A24. Although Android monthly security patches do improve general security, this ROM's outdated kernel and old proprietary vendor blobs/drivers will NEVER get updates of any kind, and could have significant security holes.
In addition, although the ROM is SElinux enforcing, there's a good chance that the rules written (about 800+ lines of code) have some errors.
If the device is rooted, this would further weaken the security.
With this information, it's up to you to make an informed decision about whether you trust this ROM to be secure enough for your financial transactions.Q25. Okay, I understand the consequences and willing to take the risks outlined, now where can I find the BETA rom?A25. Downloads are at
https://sourceforge.net/projects/retiredtab/files/SM-T810/18.1/

Monthly release notes
June 9, 2023 release notes
1. Incorporates June 5 security patches as per https://review.lineageos.org/q/topic:R_asb_2023-06
May 9 release notes
1. Incorporates May 5 security patches as per https://review.lineageos.org/q/topic:R_asb_2023-05
Apr 18 release notes
1. Incorporates Apr 5 security patches as per https://review.lineageos.org/q/topic:R_asb_2023-04
Mar 19 release notes
1. Incorporates Mar 5 security patches as per https://review.lineageos.org/q/topic:R_asb_2023-03
Feb 17 release notes
1. Incorporates Feb 5 security patches as per https://review.lineageos.org/q/topic:R_asb_2023-02
Jan 11. 2023 release notes
1. Incorporates Jan 5 security patches as per https://review.lineageos.org/q/topic:R_asb_2023-01
Dec 12 release notes
1. Incorporates Dec 5 security patches as per https://review.lineageos.org/q/topic:R_asb_2022-12
Nov 21 release notes
1. Incorporates Nov 5 security patches as per https://review.lineageos.org/q/topic:R_asb_2022-11
Oct 9 release notes
1. Incorporates Oct 5 security patches as per https://review.lineageos.org/q/topic:R_asb_2022-10
Sept 11 release notes
1. Incorporates Sept 5 security patches as per https://review.lineageos.org/q/topic:R_asb_2022-09
2. Fixes non working touchscreen and hardware buttons when powering up with power cable plugged in and device turned off. However, the recommendation is still to unplug your charger, wait 30 seconds before pressing power button when your device is turned off.
https://github.com/retiredtab/andro...mmit/7e0657629efedc7f06f6f6fb57199fca0b4e8ea6
https://github.com/retiredtab/andro...mmit/e17c44d2e282d67b243a1c99ce62127e83052c4f
3. Removed settings menu option for fast charging. S2 tablet devices do not support this.
https://github.com/retiredtab/andro...mmit/6db8e690141a98e5cf9e6952c3572c127c0cf8ea
Aug 10 release notes
1. Incorporates Aug 5 security patches as per https://review.lineageos.org/q/topic:R_asb_2022-08
2. Fixes saving of color profile in live display during a reboot/shutdown.
https://github.com/retiredtab/andro...mmit/01b1ed6ba8c268a19762031415fde1b4e45d4ac3
3. Fixes offline battery charging by writing rules to allow charger to access certain files. This removes the previous workaround. Thanks to @simon-edwards for providing an adb logcat that showed the denials.
https://github.com/retiredtab/andro...mmit/041ae45960170e68410b059f4f709e9c14b79a99
July 13, 2022
1. Added argosd to improve wifi throughput as per https://github.com/retiredtab/andro...mmit/c181aa0c5192e46a5a03d4451e2648481a520c0f
2. Incorporates July 5th security patches as per https://review.lineageos.org/q/topic:R_asb_2022-07
June 11, 2022
1. Removed vibrator code from gts2-common as wifi only models don't have vibrator motor (only LTE models).
https://github.com/retiredtab/andro...mmit/e54aee73a98e3cef6e74f96c1815cec9c82ff10d
https://github.com/retiredtab/andro...mmit/dd846b06378182398c55b57b2edc2537369bd509
2. Incorporates June 5th security patches as per https://review.lineageos.org/q/topic:R_asb_2022-06
May 10, 2022
1. Added overlay for led capacitive led buttons as per https://github.com/retiredtab/andro...mmit/83551570e4627a0e353e358787f83aa65484b528
2. Incorporates May 5th security patches as per https://review.lineageos.org/q/topic:R_asb_2022-05
April 10, 2022
1. YOU MUST read posts 1-4 if you haven't already
2. First public BETA release of selinux enforcing T810 build.
3. Incorporates April 5th security patches as per https://review.lineageos.org/q/topic:R_asb_2022-04
4. BACKUP your data because YOU MUST wipe dalvik/cache, cache, system, data and internal storage partitions in TWRP and FORMAT DATA after as this is the first release of this build. You cannot dirty flash at all. See FAQ.

Reserved.

Initial public build called lineage-18.1-20220410-UNOFFICIAL-gts210wifi.zip. The sha256sum file is provided as well to ensure integrity of download.
Yogi555 has tested all the functionality as to what works as per post #1 before uploading the build. Having said that, there's still a chance it won't work on your device due to human error, your configuration, your apps, etc. If it won't boot, always start with a complete wipe of everything and format your data. This is known has a clean install. Backup your data before a clean install.
April 10, 2022
1. YOU MUST read posts 1-4 if you haven't already
2. First public BETA release of selinux enforcing T810 build.
3. Incorporates April 5th security patches as per https://review.lineageos.org/q/topic:R_asb_2022-04
4. BACKUP your data because YOU MUST wipe dalvik/cache, cache, system, data and internal storage partitions in TWRP and FORMAT DATA after as this is the first release of this build. You cannot dirty flash at all. See FAQ Q11.

Tried the beta build and everything seems to be working. I'll observe once it goes into deep sleep and see if WiFi will lose connection (usually 24 hours) on the other 18.1 build. Loaded all my paid apps without issues. Only gripe is the Netflix with DRM L3. Will look into another thread where they spoofed it.

I'll give it a try. Other LOS 18.1 roms wifi not working.

@retiredtab, @ananjaser1211, @lpedia, @Yogi555 and @CuckooPenguin thx very much for your work.
Until yesterday mine was on ripees build from 20211103 which was stable and working but didn't seem to get any further updates than 20211208.
Clean installation went well although I didn't follow "Q5" and used latest TWRP which is 3.6.1_9-0.
Flashed it with Magisk 23. (wanted to make sure that Gapps didn't interfere)
1st boot was fast, setting it all up.
Looking in settings for button backlight duration but didn't find it (using it in the night and want them to light up as short as possible).
Wifi connection there as soon as it wakes up.
So I gave BitGapps a go and flashed ARM64 which worked (isn't specified in "Q12" and as far as I remember only ARM worked on ripees build).
Fiddling around a bit installing paid apps and others.
Everything seems to be fine especially for a beta version.
For others who want to change from ripees version to this one:
On mine it worked to restore "Data" via TWRP (partition got wiped again before) what makes it much easier to switch.
Each app I use seems to be working under the new ROM without problems.
Fun fact: button backlight after restoring is as short as it was set in the prior ROM.

bmwdroid said:
Clean installation went well although I didn't follow "Q5" and used latest TWRP which is 3.6.1_9-0.
Click to expand...
Click to collapse
The reason I write MUST is that not all TWRP from the official TWRP site work properly. For example, when I was initially building the 18.1 tree back in July/Aug 2021, I needed mtp and adbd to work in TWRP T710 for debugging purposes.
Despite the change log claiming both were fixed, not a single version worked wrt mtp and adbd. I knew this way back in Dec 2020 and you may have even seen my post #124 since you were post #122 and #126 in the same thread.
So in order to get 18.1 up and running, I fixed TWRP T710 myself as I explain at
https://forum.xda-developers.com/t/recovery-unofficial-twrp-3-5-2_9-for-samsung-sm-t710.4430335/
So for T710 users, I know my TWRP build is rock solid as I have easily used it more than 150 times when making the 18.1 rom.
Another example. During the summer of 2020, I upgraded the OS on a Samsung S4 phone for my friend. I went to official TWRP website, downloaded the latest and much to my surprise, the touchscreen didn't work at all. I used an older TWRP version and it worked fine.
Bottom line: even though it's on the official TWRP website does not mean it's tested or working properly. In the case of the S4 TWRP with the non working touchscreen, it's obvious there was zero testing done.
That's why we will test ALL our 18.1 builds for the "what works" functionality in post #1 before uploading to the general public.
bmwdroid said:
Looking in settings for button backlight duration but didn't find it (using it in the night and want them to light up as short as possible).
Click to expand...
Click to collapse
By sheer coincidence, I already had the above in my private build on March 27 as I wanted to test it to make sure it works before adding it into github. Yes, I test even 1 line of code change myself no matter how trivial.
The 1 line of code needed is documented at
https://review.lineageos.org/c/LineageOS/android_device_samsung_s3ve3g-common/+/292889
I will put this change into my github so that it gets built with the May 5 security patches.
bmwdroid said:
Wifi connection there as soon as it wakes up.
Click to expand...
Click to collapse
My github repo has always had the S2 wifi blobs after @lpedia and I fixed it on Aug 7, 2021 as per
https://github.com/retiredtab/propr...mmit/3984c2ef6852794a939b8eda689fc477705d5c86
As you can see in my github history, that reversion back to S2 wifi has never changed since Aug 7, 2021.
bmwdroid said:
Fun fact: button backlight after restoring is as short as it was set in the prior ROM.
Click to expand...
Click to collapse
Without looking through the 1000's lines of code or more, the above functionality exists probably in the hardware/samsung repo
https://github.com/LineageOS/android_hardware_samsung/tree/lineage-18.1/hidl/light
and the settings are probably saved in some directory, but the display menu for the button backlights isn't shown until I put in that one commit above. That is, the OS knows to use the saved settings, but without the menu overlay, it doesn't show the menu itself.

retiredtab said:
The reason I write MUST is that not all TWRP from the official TWRP site work properly. For example, when I was initially building the 18.1 tree back in July/Aug 2021, I needed mtp and adbd to work in TWRP T710 for debugging purposes...
Despite the change log claiming both were fixed, not a single version worked wrt mtp and adbd. I knew this way back in Dec 2020 and you may have even seen my post #124 since you were post #122 and #126 in the same thread....
Click to expand...
Click to collapse
Well I gotta admit I didn't check adb and mtp in that TWRP.
I probably saw your post but might not have paid attention as they referred to T710 and as I own T810 I judged them as not relevant for me.
retiredtab said:
...
Bottom line: even though it's on the official TWRP website does not mean it's tested or working properly. ...
Click to expand...
Click to collapse
That's what I've noticed as well for T325.
retiredtab said:
..My github repo has always had the S2 wifi blobs after @lpedia and I fixed it on Aug 7, 2021 as per
https://github.com/retiredtab/propr...mmit/3984c2ef6852794a939b8eda689fc477705d5c86
As you can see in my github history, that reversion back to S2 wifi has never changed since Aug 7, 2021....
Click to expand...
Click to collapse
I just mentioned wifi functionallty for those users of T810 having problems with ripees ROM after version 20211103 and looking for a stable version regarding that feature.

retiredtab said:
......Without looking through the 1000's lines of code or more, the above functionality exists probably in the hardware/samsung repo
https://github.com/LineageOS/android_hardware_samsung/tree/lineage-18.1/hidl/light
and the settings are probably saved in some directory, but the display menu for the button backlights isn't shown until I put in that one commit above. That is, the OS knows to use the saved settings, but without the menu overlay, it doesn't show the menu itself.
Click to expand...
Click to collapse
The settings seem to be in the file /data_mirror/data_de/null/0/org.lineageos.lineagesettings/databases/lineagesettings.db
When opening in DB Browser I found:
In table "secure" the lines
46 "button_backlight_timeout" (value 1000 [probaly for milliseconds as I set it to 1s in ripees ROM]) and
47 "button_brightness" (value 1.0).
In table "system" the line
47 "button_backlight_only_when_pressed" (value 1).
Never worked with .db files myself before but for the knowing it might be interesting if they want to fiddle around a bit.

New build called lineage-18.1-20220510-UNOFFICIAL-gts210wifi.zip
Yogi555 has tested all the functionality as to what works as per post #1 before uploading the build. Having said that, there's still a chance it won't work on your device due to human error, your configuration, your apps, etc. If it won't boot, always start with a complete wipe of everything and format your data. This is known has a clean install. Backup your data before a clean install.
May 10, 2022 release notes
1. YOU MUST read posts 1-4 if you haven't already
2. Added overlay for led capacitive led buttons as per https://github.com/retiredtab/andro...mmit/83551570e4627a0e353e358787f83aa65484b528
3. Incorporates May 5th security patches as per https://review.lineageos.org/q/topic:R_asb_2022-05
4. If you are upgrading from the April 10 build, you may dirty flash the May 10 build. If you are NOT coming from the April 10th, 2022 build, you MUST BACKUP your data because YOU MUST wipe dalvik/cache, cache, system, data and internal storage partitions in TWRP and FORMAT DATA. You cannot dirty flash at all. See FAQ Q11.

@retiredtab just flashed it onto 20220410.
1st try very dirty (not wiping anything) resulting in bootloop.
2nd flash (after wiping system+caches) of ROM, Bitgapps28-arm, Magisk23 made it start.
Magisk had of course to patch boot.img again.
Thx very much.

Due to a post in the T710 regarding gapps, I will be removing opengapps from the FAQ because for several months now (starting around Oct 2021), the opengapps project has been releasing UNTESTED builds that results in bootloops or non working gapps services. Despite numerous requests/posts from the community to slow down the releases and actually TEST THEM BEFORE release, the latest May 3, 2022 shows there is still room for improvement.
This thread in the opengapps forum is just the latest example. Details of UNTESTED builds are also in the same megathread below.
https://forum.xda-developers.com/t/...rsions-devices.3098071/page-367#post-86885091
It's also shown up in other roms like
https://forum.xda-developers.com/t/...7-1-04-30-2022.3937956/page-100#post-86885353
This would be a good time for user to do their own research on which gapps is best for them or use NONE at all. I use Aurora Store myself.
Just a reminder that the builds we release are TESTED and verified to have all the functionality as listed in post #1.
T710 thread post #8, #9 and #10.
https://forum.xda-developers.com/t/...neageos-18-1-for-sm-t710-may-12-2022.4430339/

I wanted to express my sincere thanks to @retiredtab and @Ipedia for your work on the ROMs for the T710 and T810. I have both devices and had previously used the @ripee versions in thread (2) [ROM][UNOFFICIAL][11] LineageOS 18.1 [T710][T715][T715Y][T810][T815][T815Y] | XDA Forums (xda-developers.com). But that 18.1 version had some noticeable bugs and wasn’t being maintained.
Thanks to @bmwdroid ’s April 15 post directing us to this forum, I have been experimenting with this ROM since then on both the T710 and the T810. Based on my pretty heavy usage, I can declare both to be excellent. Most notably, the WiFi is rock solid. The T810 and the T710 (especially) are outstanding hardware, and being able to run Android 11 is a huge boost in the device’s intrinsic value.
I have experienced a couple of random BSOD-equivalent crashes over the past month, but the tablet always immediately restarted. I am going to try and learn how to provide the necessary to the developers so, if it happens again, they can have the necessary evidence. Since I am a decent techie, but not a developer, I decided to write up the complete upgrade procedure I followed so others who come to this forum may benefit. See my next post.
PS: I put this post on both the T710 and the T810 threads since I have both devices.

Tab S2 T710 and T810 Upgrade Procedure Using LineageOS 18.1 ROM by retiredtab
These installation instructions work for both Tab S2 T710 and T810. I have both devices and have tested on both. I am a Windows guy, so these instructions assume a Windows PC. I am a lifelong techie guy and an Android enthusiast. But I am not developer, so these instructions should work for any competent newbie who is a decent techie, but I realize there may be alternative approaches for those who have deeper tech knowledge than me.
Step 1 – Preparation
Update your Tab S2 to the latest stock software.
Install a micro-SD card into your Tab S2.
Enable Developer Options – tap Build Number seven times.
In Developer Options, turn on USB debugging.
Connect your TGab S2 to your PC via USB and download onto the micro-SD card three files:
Retiredtab’s latest Lineage 18.1 ROM from lpedia-sf - Browse /gts28wifi at SourceForge.net (T710) or retiredtab - Browse /SM-T810/18.1 at SourceForge.net (T810)
open_gapps-arm-11.0-pico-20220215.zip from The Open GApps Project
Magisk-v24.3.apk from Release Magisk v24.3 · topjohnwu/Magisk · GitHub
Download to your PC TWRP_3.5.2_9_SM-T710_20210719_Unofficial.tar from retiredtab - Browse /SM-T710/TWRP at SourceForge.net (T710) or twrp-3.5.2_9-0-gts210wifi.img.tar from Download TWRP for gts210wifi (T810)
Download to your PC Odin, from https://technastic.com/wp-content/uploads/2020/02/Odin3_v3.14.4.zip, and extract the zip.
Comments:
I saw retiredtab’s comments about OpenGApps quality. However, this version works well for me. I had previously tried the latest MindTheGapps (which hung) and BiTGapps (which doesn’t include the Google restore functionality that I use.)
Magisk is optional if you want/like root. I do!
Step 2 – Install TWRP Recovery
Power off your Tab S2.
Launch Odin on your PC and press OK.
Power up your Tab S2 into Download mode by holding down Home+VolDown+Power.
Then at the Warning screen hit VolUp.
Connect your Tab S2 via USB to your PC, and you should see Added!! in Odin.
Click AP in Odin and select the downloaded TWRP.
In Odin Options, uncheck Auto Reboot.
Click Log tab again.
Click Start in Odin.
Installed TWRP only takes a couple of seconds.
You will see progress in the Log, and Pass at the top of Odin when done.
Step 3 – First boot into TWRP.
This part is tricky!
Power down your Tab S2 by holding down VolDown+VolUp+Power.
IMMEDIATELY the screen goes blank, hold down Home+VolUp+Power.
Keep holding down until you see the TWRP home page.
If you end up booting into Android rather than TWRP then you will have to repeat steps 2 and 3 again.
Step 4 – Backup your stock ROM
In TWRP, select Backup, Select Storage to choose your micro-SD card, check all the boxes, and then swipe Backup.
Step 5 – Install ROM and GApps.
In TWRP, select Wipe, then Advanced Wipe.
Select all partitions except Micro SD Card.
Swipe to Wipe.
Back, Back again, then Format Data
Type yes, and hit check.
Back, Back, Back, and select Install.
Select your micro-SD storage.
Select the Lineage-18.1 ROM.
Add more Zips, and select open_gapps.
Swipe to confirm Flash.
Installation took about 3 minutes.
Wipe Cache/Dalvik, and Swipe to Wipe
Reboot System
Step 6 – Build your Android 11 Tab S2
First boot into Lineage was less than a minute, and then the Lineage boot animation took less than 2 minutes before “Hello” appeared.
On each build I’ve done I see “Speech services by Google keeps stopping” error once Hello appeared.
I assume this is one of the known OpenGApps bugs.
Clicking Close App makes it go away, and later Google replaces the module anyway.
Set up your Android device per your preference. I have loads of Apps so it takes me a long time. If you are less of a pack-rat, it shouldn’t take long!
At the end of the initialization process, be sure not to choose the Replace Lineage recovery option, otherwise TWRP goes away.
I have found that, by not installing Magisk initially, Google restores all my Apps, including the sensitive ones such as Peacock, Netflix, Disney+, etc. And when I check Google Play/Settings and scroll to the bottom, I see “Device is certified”.
I recommend leaving tablet completely alone until Google has finished its “Copy Apps and Data” from my other tablet. When I get impatient and fiddle around as it’s copying I’ve seen crashes.
Once all copying is done, do your unique Android setup. My go-to Android settings are:
Nova Prime Launcher (actually, gets selected during the copy process, but I load my layout from backup at this time)
Microsoft Swiftkey
Default USB = File Transfer
Window/Transition/Animator Scale all set to Animation Off
Screen timeout 30 minutes, and screen saver Clock
Battery %age next to icon
FX File Explorer
Microsoft Edge as default browser (with AdBlock enabled and Google as search and sync to my PC)
Raindrop, for all my bookmarks
Advanced restart menu (to allow reboot into TWRP).
Step 7 – Make Root
Restart Tab S2 into TWRP.
In TWRP, Install Magisk-v24.3.apk.
Reboot System
In Android install Magisk-v24.3.apk.
Open Magisk and select zygisk in settings.
Restart again.
You now have root. I test by enabling root in FX File Explorer and granting root.
Step 8 – All done!
I do a final and full TWRP backup once the device is solid.
Note:
I found the fingerprint reader sometimes works to unlock the Tab S2. Per other discussions on this thread, looks like I got lucky!

pflyaz said:
Tab S2 T710 and T810 Upgrade Procedure Using LineageOS 18.1 ROM by retiredtab
Click to expand...
Click to collapse
Thanks. I updated FAQ to point to post #16 for newbies.

Hi just a question regarding Q5
A5. You MUST use TWRP 3.5.2_9.
Is there a reason for this! I'm only asking because I have 3.6.0.9-0 installed so just wondered why its a must.
Edit - ignore the message above I didn't see post 9 when reading this on my tablet but do now I am on PC.

Had this running now for the last 5 hours, everything seems to be fine but I'm seeing very slow WiFi speeds. Coming straight from (lineage-18.1-20211103-UNOFFICIAL-gts210wifi) where I was getting a constant speed over 330mb I'm now only getting 110 dropping down to 70 at best.

lojelo said:
Had this running now for the last 5 hours, everything seems to be fine but I'm seeing very slow WiFi speeds. Coming straight from (lineage-18.1-20211103-UNOFFICIAL-gts210wifi) where I was getting a constant speed over 330mb I'm now only getting 110 dropping down to 70 at best.
Click to expand...
Click to collapse
@retiredtab Maybe just a wild guess, but might this commit be related? In my understanding argosd is a daemon that controls the CPU governor so that CPU performance can be adopted to network bandwith requirements. Shouldn't that be activated for Wifi models as well?

[UNOFFICIAL][ROM]ALPHA LineageOS 20 for SM-T810 - June 23, 2023

LineageOS 20 UNOFFICIAL for 2015 Samsung Galaxy Tab S2 SM-T810 ONLY
Model: SM-T810 (wifi) - gts210wifi - 9.7" screen, Exynos 5433 SoC, no LTE
This is the ONLY model that the ROM will work on.​
You MUST READ posts 1-4 (about 10 minute read) before deciding to install this rom. If you think this is an unreasonable request, then stop reading now and find another rom. Thank you.
DISCLAIMER
I am not responsible for lost data, identity theft, lost money, security vulnerabilities, bricked devices or any other hardware or software malfunctions that comes as a result of flashing this rom.
All involved in bringing this build to you are working voluntarily on it in very limited spare time, and their other life commitments have much higher priority. Don't expect a prompt, or even any, response to questions and bug reports.
Before attempting to install this ROM
1. Ask yourself: would bricking your device be a disaster for you? If yes, don't try this ROM! It can't be guaranteed stable and reliable enough to depend on for daily use.
2. BACKUP YOUR DATA AND EXISTING ROM. Be prepared for a complete restore if anything goes wrong.
3. RESEARCH adb, fastboot, Odin/heimdall, and TWRP and how to use them, if not already familiar with these.
What works
1. bluetooth
2. wifi
3. brightness
4. external audio
5. GPS
6. audio through headphone jack
7. audio over bluetooth
8. selinux enforcing
9. DRM level 3 (SD definition)
10. deep sleep
11. camera
What doesn't work/What hasn't been tested
1. fingerprint is completely removed in 19.1. When I tested it in March 2022, it wasn't compatible with keystore2 and as I wrote in post 1891 at
https://forum.xda-developers.com/t/...t810-t815-t815y.3879302/page-95#post-85533725
it never worked properly after deep sleep. If you need fingerpint to work, stay with stock Samsung rom.
2. DRM level 1 (no HD definition). There's more detail in post 1891 above. I will not be trying to achieve level 1 for HD definition. If you need HD definition for your $treaming media, stay with stock Samsung rom.
3. full disk encryption has been deprecated in Android 13 (LineageOS 20).
4. If you charge the device while it's powered off and then want to power it on, you MUST wait at least 30 seconds AFTER disconnecting the charger cable before pressing the power button otherwise you might run into strange boot problems.
5. There has no been no fix for the “Connected to device. Can’t provide internet” (CPI). DO NOT ASK when this will be fixed. If/when it is fixed, it will be announced public in this thread.
If you have a lot of apps installed, you may run into CPI as we suspect it's possibly a slow memory leak. Depending on how many apps you have installed CPI may show up in 14 days. The only way to "fix" CPI is to reboot.
CPI may also show up if you have even just one app that somehow triggers a huge/large memory leak. Again, the only "fix" is to reboot.
We've spent a lot of time trying various kernel binder patches and updating the binder code as much as possible, but some users, NOT all, still run into CPI. Since I use Aurora Store and minimal apps, I never run into CPI like some pre ALPHA testers.
6. Device running really slow/laggy due to low memory. If you run a lot of apps that "phone home/connect to mothership", there's a possibility that it triggers a slow memory leak and the device, over time, becomes slow and laggy. You can see if you're low on memory by running
Bash:
$ adb shell dumpsys meminfo
Total RAM: 2,827,980K (status critical)
Free RAM: 256,196K ( 53,728K cached pss + 87,128K cached kernel + 115,340K free)
Used RAM: 3,638,878K (3,067,642K used pss + 571,236K kernel)
Lost RAM: -346,213K
ZRAM: 671,040K physical used for 1,412,244K in swap (1,413,984K total swap)
Tuning: 192 (large 512), oom 184,320K, restore limit 61,440K
When the above shows "status critical", that's a sign of a memory leak and you may get CPI or slow/laggy performance. The only "fix" is to reboot. It should show "status normal" after a reboot.
If you're a developer, we could use some help here determining where the memory leak is.
7. gapps. Some of you require gapps for whatever reason. I use Aurora Store for my purposes and thus have NO KNOWLEDGE of the current state of gapps.
There are various gapps projects (at least 5 in 2023). Each has pros and cons. It's your job to do the research and find a suitable gapps project. I suggest you allocate at least a couple of hours/days doing your own research. My rom works by itself fine without gapps. DO NOT talk about gapps in this thread.
I have created a new 20 thread for those wanting to discuss gapps at
https://forum.xda-developers.com/t/...sion-for-20-roms-sm-t710-and-sm-t810.4600455/
In there, you will find what pre ALPHA testers have been using.
8. Possibly other features/apps that I haven't tested or do not use.
Source Code
Kernel source code
https://github.com/retiredtab/andro...ersal5433-selinux/tree/lineage-20-8916-binder
See FAQ 1 for links to the device tree, manifest and build instructions in post #2.
Thanks
1. LineageOS team for source code.
2. LineageOS-UL team for merging, maintaining the legacy patches needed for old devices into one common repository so everyone can benefit.
https://github.com/orgs/LineageOS-UL/people
3. In alphabetical order.
@ananjaser1211
- answering 5433 related questions wrt to certain features.
@bmwdroid
- testing many pre ALPHA 20 builds and reporting the results
@lpedia
- testing many pre ALPHA T710 builds starting in late Oct 2022 and reporting the results
- verifying my build instructions work so that the technically inclined can build this from source
- building, maintaining and most importantly, testing the T710 20 builds before monthly security patches release
@metterschling
- suggestions, feedback on 20
- verifying my build instructions work so that the technically inclined can build this from source
@pflyaz
- testing many pre ALPHA 20 builds and reporting the results
@Yogi555
- testing many pre ALPHA 20 builds and reporting the results
- verifying my build instructions work so that the technically inclined can build this from source
- building, maintaining and most importantly, testing the T810 20 builds before monthly security patches release

Frequently Asked Questions. You MUST READ this before posting any questions. If you think this is unreasonable, then find another rom. Thank you.
QuestionAnswerQ1. Can I build this ROM for myself? Where are the source and kernel source files?A1. Yes, you can. The source files are listed below.
Kernel
https://github.com/retiredtab/android_kernel_samsung_universal5433-selinux
Device Tree
https://github.com/retiredtab/android_device_samsung_gts2-common-selinux
https://github.com/retiredtab/android_device_samsung_gts210wifi
Vendor
https://github.com/retiredtab/proprietary_vendor_samsung-selinux
The build manifest and instructions on how to compile from source are at
https://github.com/retiredtab/LineageOS-build-manifests/tree/main/20/exynos5433Q2. Is this ROM suitable as a daily driver?A2. It might be, depending on your requirements. You would need to try it yourself, with your preferred apps, to see if suits your purposes. I've been using it myself since Oct, 2022 with no major issues.Q3. What do I do if my app xyz doesn't work?A3. I can't help diagnose problems with random apps I know nothing about. If the app is critically important to you and it doesn't work on this ROM, go back to a ROM where it did work.Q4. Why is this ROM laggy and/or buggy?A4. The device will be noticeably slower if you're using any Gapps package. Consider going gapps-free. A lot of apps will work without Google's services, or there exist alternatives that will. Check out F-Droid, Aurora Store, NewPipe, etc.Q5. What TWRP should I use?A5. You MUST use TWRP 3.6.2_9. Get it from
https://dl.twrp.me/gts210wifi/Q6. Why should I use this ROM?A6. You don't have to! If you don't like it, go back to your old ROM.Q7. Will you offer monthly updates with security patches?A7. We plan to do so. We will try to update the ROM with the monthly security patches after LineageOS has released them, free time permitting. Each monthly build will be tested to make sure all the "What works" functionality listed in post #1 still works, before it's made available (which might in some cases delay the release).Q8. I'm a newbie. Can you provide step by step instructions?A8. We simply don't have the time to do this, but there are lots of tutorials, videos, etc online showing how to flash custom ROMs and how to deal with common problems. Newbie questions are also accepted in the XDA General Questions and Answers forum.Q9. Can I report a bug with respect to the ROM?A9. Yes, but you need to supply the following information. If you don't, I won't look at it.
Provide an adb logcat of the problem, and if possible describe how to reproduce it. Note that I can't help if it involves downloading any app I don't already use that requires payment or creating a userid/password.
To get a logcat, open a terminal window on your PC, connect your device to it via USB, and do this:
Code:
# clear the logcat first
adb logcat -c
# start logcat trace
adb logcat > problem.txt
# reproduce problem
# wait until problem has occurred,
# then stop trace by hitting ctrl-c
# zip the problem.txt file before uploading it.
Q10. How long will you build 20 for this device?A10. For now, 20 will be built for all of 2023. After that, we will make a decision depending on a number of factors.Q11. Do I need to erase everything and format my data before installing this ROM for the first time?A11. If you're coming from stock Samsung Android, or an earlier version of LineageOS, or a different custom ROM, you MUST 'clean flash': boot to TWRP recovery, wipe system, data, dalvik/art cache, and cache partitions, then Format Data, then install this ROM.
If you don't do this you're likely to run into problems, such as getting stuck at the boot animation for more than 5 minutes.Q12. What Gapps should I use?A12. Your choice! There are several well-known Gapps packages, such as NikGapps, BiTGapps and MindTheGapps. Do your own research as to what is the most reliable gapps option for you. As a courtesy to gapps users, I opened a thread at
https://forum.xda-developers.com/t/...sion-for-20-roms-sm-t710-and-sm-t810.4600455/
for you to discuss gapps. Do not discuss gapps in this thread. Thank you.
You could also consider Google alternatives, such as Aurora Store, which mirrors the Google Play Store apps but doesn't need any Google services itself. Many Play Store apps do not actually depend on Google services.
If you are going to install any Gapps package, follow the installation instructions given for that particular package.Q13. I'm having problems with Gapps. Can you tell me why it's not working?A13. I can't answer any questions about Gapps, because I don't use them. Ask your questions on the XDA thread for the Gapps package you're using.Q14. Why isn't my post answered?A14. There are several possible reasons: the question is answered in the FAQ (in which case it will be ignored completely); or it involves apps or operating systems that I don't use; or it's about Gapps, which I don't use; or I simply have not had time to answer any questions.Q15. What speed up/optimization tips do you suggest?A15. These steps can make a big difference to performance:
Turn off animations. Go to Settings > System > Developer options, scroll down to the Drawing section, and set Window, Transition and Animator scale all to "Animation off".
Don't install Gapps unless you depend on something that only Google is providing. Use Aurora Store to get your preferred Play Store apps - they will all be available on Aurora Store. You can choose to access this anonymously or use a Google account.
Don't run more than two apps at the same time. You can probably listen to music in the background and use a web browser at the same time.
Use a web browser with built-in adblock and privacy features, such as Brave.
Use NewPipe to watch your streaming content. It has built in adblock so you don't have to watch forced ads.
Look for apps that are open source, ad-free and lightweight.
Q16. Does this ROM support Magisk so I can root my device?A16. Magisk works with this ROM as reported by beta testsers, but that could change with any revision and changes by Google. However I don't use it myself and can't help with any related issues. Direct any questions about Magisk to the XDA Magisk forum.Q17. Will this ROM ever become official?A17. With 19.1 and up, legacy devices like ours will NEVER be official due to lack of ebpf support. See https://lineageos.org/Changelog-26/Q18. What is the difference between this ROM and others?A18. This ROM tries to be pure LineageOS with little or no modification. Other ROMs may come with a different UI, different bundled apps, etc.Q19. Will there be any major 20 code modifications in the future?A19. There may be some major modifications along with some slight tweaking to the SEpolicy, small bug fixes and minor code cleanup, but all the hard work - getting the rom up and running, and fixing all the major bugs - has been done.Q20. Why did you fork the trees?A20. I wanted my own private branch where I could make changes that would only affect my own personal builds.Q21. Can you build a variant of this device? For example, a LTE or S-pen version?A21. I cannot and will not try to build for a variant device if I don't physically have that device. I have to be able to boot and test it myself, and there's no guarantee that I can get those variant features working.Q22. Can I load this ROM on a variant device like LTE or S-pen version?A22. This ROM is for the device explicitly listed and will only work on that device. Do not try to install it on any other device.
ONLY if you are an advanced user and understand TWRP, adb, odin, heimdall, etc, you could try loading it on a LTE or S-pen variant by modifying the updater-script, but be warned: there are likely to be problems, including a bricked device, bootloops, or the ROM not being able to support the functionality of LTE/S-pen.Q23. Does this ROM have any wifi connection issues?A23. This ROM's wifi has been stable on the specified device ever since lpedia and I determined the root cause of the wifi problems back in July 2021 and re-installed the original S2 network 'blobs' with LOS 17.1.Q24. Is this ROM secure so I can do financial transactions?A24. Although Android monthly security patches do improve general security, this ROM's outdated kernel and old proprietary vendor blobs/drivers will NEVER get updates of any kind, and could have significant security holes.
In addition, although the ROM is SElinux enforcing, there's a good chance that the rules written (about 1000+ lines of code) have some errors.
If the device is rooted, this would further weaken the security.
With this information, it's up to you to make an informed decision about whether you trust this ROM to be secure enough for your financial transactions.Q25. How do I turn off the taskbar at the bottom of the screen?A25. Goto settings, system, buttons and disable taskbar.Q26. Okay, I understand the consequences and willing to take the risks outlined, now where can I find the ALPHA rom?A26. Downloads are at https://sourceforge.net/projects/retiredtab/files/SM-T810/20/

Release notes
NOTE: All builds that I upload have been personally tested on my device to boot and function as described in post #1. Having said that, there's still a chance it won't work on your device due to human error, your configuration, your apps, etc. If it won't boot, always start with a complete wipe of everything and format your data in TWRP. This is known has a clean install. Backup your data before a clean install.
June 23, 2023
1. Initial 20 ALPHA public release.
2. Incorporates June 5th security patches as per https://review.lineageos.org/q/topic:"T_asb_2023-06"
3. If you are coming from stock rom or an older LineageOS version (example, 18.1 or 19.1), you MUST format your data in TWRP. Remember to backup your data and verify that restore data works before upgrading to 20.

Reserved.

[UNOFFICIAL][ROM]ALPHA LineageOS 20 for SM-T813 - June 23, 2023

PLEASE BEFORE YOU decide to try this rom, you MUST read all of post 1, 2, 3 and 4 (about 10 minute read). If you think this is an unreasonable request, then stop reading now and find another rom. Thank you.
This is ONLY for the T813. I do not have and will NOT build T713, T719 and T819. See post #2, FAQ 20. Any questions asking to build these will be ignored.
I am not responsible for lost data, identity theft, lost money, security vulnerabilities, bricked devices or any other hardware or software malfunctions that comes as a result of flashing this rom.
BACKUP YOUR DATA AND OLD rom BEFORE trying my rom.
If you are NOT an expert in using fastboot, adb, odin, heimdall, twrp, DO NOT use this rom. You must know how to use these tools to revert back to your old rom. If you are new to flashing custom roms, do NOT attempt this. If you need your tablet for work and something important, do NOT flash this rom. This rom could result in a bricked device ,boot loop, complete loss of data or non booting device or you not being able to revert back to your old rom.
What works
1. bluetooth
2. wifi
3. brightness
4. external audio
5. GPS
6. audio through headphone jack
7. audio over bluetooth
8. selinux enforcing
9. deep sleep
10 DRM level 3 (SD definition)
Known issues/What doesn't work/what's not tested
NOTE: If any following features are important to you, don't use this rom as I will not be fixing them because I
i. don't use/need that feature
ii. already tried fixing it and couldn't succeed and won't spend anymore time on it.
1. Stock camera doesn't work at all (reason i and ii). Starting with LineageOS 19.1 and higher, camera API functionality (pictures and videos) isn't even recognized by the OS.
2. fingerprint (reason i). I never use it and I see it doesn't even load correctly in the logs.
3. ARM64 gapps (reason i). Some of you require gapps for whatever reason. I use Aurora Store for my purposes and thus have NO KNOWLEDGE of the current state of ARM64 gapps.
There are various gapps projects (at least 5 in 2023). Each has pros and cons. It's your job to do the research and find a suitable gapps project. I suggest you allocate at least a couple of hours/days doing your own research. My rom works by itself fine without gapps. DO NOT talk about gapps in this thread.
4. full disk encryption has been deprecated in Android 13 (LineageOS 20).
5. If you restart the device with the purpose to reboot it and the usb cable is plugged in, the device will not reboot and stay in charging mode. Simply unplug the usb cable, wait 15 seconds and restart the device.
Source code
The kernel source code is at
https://github.com/syphyr/android_kernel_samsung_msm8976/tree/lineage-16.0
All the source code including the kernel, device trees, manifest and build instructions are provided in post #2 FAQ1.
Thanks
1. LineageOS team for source code.
2. LineageOS-UL team for merging, maintaining the legacy patches needed for old devices into one common reposistory so everyone can benefit.
https://github.com/orgs/LineageOS-UL/people
3. @Deltadroid for updating the msm8976 kernel for branches 14.1 and 16.0 with bug and security fixes. I'm using his 16.0 kernel branch for my 20 builds.

Frequently Asked Questions. You MUST READ this before posting any questions. If you think this is unreasonable, then find another rom. Thank you.
Q1. Where are the source and kernel source files?
A1. The kernel source files are at
https://github.com/syphyr/android_kernel_samsung_msm8976/tree/lineage-16.0
The device tree files are at
https://github.com/retiredtab/msm8976-common/tree/lineage-20
https://github.com/retiredtab/gts210vewifi/tree/lineage-20
The vendor tree files are at
https://github.com/retiredtab/proprietary_vendor_samsung_msm8976
The manifest.xml (or roomservice.xml) and build instructions for LineageOS 20 are at
https://github.com/retiredtab/LineageOS-build-manifests/tree/main/20/msm8976
Q2. Is this ALPHA rom suitable as a daily driver?
A2. It can be depending on your requirements. I can't test every app so you try it yourself to see if it's suitable. I've been using this rom myself since Jan 2023 with no major issues. I suggest you do a clean install, see FAQ 11, and flash this ROM BY ITSELF (no gapps, magisk, etc) and see if you like it.
Q3. What if my app, xyz, doesn't work?
A3. If your app doesn't work, then go back to your old rom.
Q4. Your rom is laggy and buggy.
A4. If you find the above, then go back to your old rom. Your tablet will also run slower when you use gapps. You can run a lot of software without using gapps. Research fdroid, newpipe, Aurora store etc.
Q5. What TWRP should I use?
A5. You MUST use TWRP 3.6.2_9-0. Do not use any other version including the "latest".
https://dl.twrp.me/gts210vewifi/
I will not answer questions if you don't use this exact TWRP version.
Q6. Why should I use this rom?
A6. If you don't like this rom, then don't use it.
Q7. Will you offer monthly updates with security patches?
A7. I will try to offer monthly security patches, but that all depends on if I continue to have high speed Internet in the future.
Q8. Can you help me? I'm a newbie. Can you provide step by step instructions?
A8. I don't have the time to help newbies, so please do your own research. There are lots of tutorials, videos, etc on how to flash roms. Newbie questions must be posted in the Questions and Answers forum, not here. In addition, I don't run Windows OS at all.
Q9. Can I report a bug with respect to the rom?
A9. Yes, but you need to supply the following information. If you don't, I won't look at it.
You must provide an adb logcat of the problem and tell me how to reproduce it. Note I will not be downloading any apps that require money or an userid/password. For example, if you have problems with Netflix, I cannot help you since I don't have a paid subscription. If you use some app that requires an userid/password, I cannot help you as I'm not willing to create another userid/password even if it's free.
To get a logcat, open up a terminal window.
Code:
# clear the logcat first
adb logcat -c
# start logcat trace
adb logcat > problem.txt
# reproduce problem
# wait until problem has occured, then stop trace by hitting ctrl-c
# attach the problem.txt ZIPPED as text files don't seem to get attached properly
Q10. Will you build Android 14 and higher for this device?
A10. Any questions on higher Android versions will be completely ignored. I do this in my free/spare time and will not be subject to any ETAs or demands. If you want a higher version, the source code is freely available as per FAQ #1 and you can build it yourself.
Q11. Do I need to erase everything and format my data?
A11. Yes, you MUST erase all the partitions (system, data, dalvik/art cache, cache) using TWRP and MUST format your data before installing 20 when you are coming from stock or an earlier version of LineageOS or from another custom rom. If you get stuck at the boot animation for more than 5 minutes, it's likely because you didn't follow the instructions I just wrote. Dirty flashes from stock, other custom roms or older LineageOS versions are not supported and not likely to work.
You MUST FORMAT DATA in TWRP so backup your files first to some external storage (external microsd or PC).
NOTE: After you do the above, first boot (without gapps, magisk, etc) will take about 90 seconds. It may pop with a message saying "System UI isn't responding". Hit close app and then reboot the tablet again.
Q12. What gapps should I use?
A12. I don't use gapps anymore. I use Aurora Store. As of Nov 6, 2021, I no longer make recommendations on which gapps to use as your mileage may vary.
Let me by crystal clear. YOU NEED TO DO YOUR OWN HOMEWORK selecting between the various ARM64 gapps offered. There are 5: opengapps, nikgapps, mindthegapps, flamegapps and bitgapps. Each one will have it's own installation instructions. The only recommendation I will offer to use the SMALLEST version of gapps.
Don't be surprised that whatever gapps you use might have problems like "Just a sec", voice not working, updating google play store please wait, etc. These are NOT problems of the OS as the OS will run fine without gapps. These are gapps problems and you must ask in the gapps forum why it doesn't work.
In addition, some of the gapps may not install properly when using TWRP and say "cannot /mnt/system".
Q13. I'm having problems with gapps, can you answer why it's not working?
A13. I WILL NOT answer any questions regarding gapps. This thread is about the rom, not gapps. Android does not depend on gapps in order to work.
Q14. Why isn't my post answered or ignored?
A14. Questions already answered in the FAQ will be completely ignored. Again, I do not use Windows OS or gapps.
Q15. What speed up/optimization tips do you suggest?
A15.
1. Turn off animations. Go into developer settings, scroll down to the drawing section, and set window, transition and animator scale all to "off".
2. If you don't have a google account, don't install gapps. Use Aurora Store to get your apps as you can get all the same apps from the play store using an anonymous login.
3. Use a web browser like Brave that has built in adblock and privacy features.
4. Use newpipe to watch your streaming content. It has built in adblock so you don't have to watch forced ads.
5. Look for apps that are open source, ad free and lightweight.
Q16. Does this rom support Magisk for root?
A16. I don't use Magisk. Magisk is always being updated to fool Google's certification process which may or may not work.
Q17. Will this rom ever become official?
A17. With 19.1 and up, legacy devices like ours will NEVER be official due to lack of ebpf support. See https://lineageos.org/Changelog-26/
Q18. What is the difference between this rom and others?
A18. This rom tries to be pure LineageOS with little to no modifications.
Q19. Will there be any major 20 code modifications in the future?
A19. I don't anticipate any major modifications. There may be some small bug fixes and minor code cleanup, but all the hard work in getting the rom up and running and fixing all the major bugs have been completed. This doesn't mean the code is perfect or well organized, but I won't be doing any major changes now that 20 is working.
Q20. Can you build a variant of this device? For example, a LTE or S-pen version.
A20. If I don't physically have the device, I cannot and will not build it unless I can boot and test it myself. Even then, there's no guarantee that I can get those variant features working. To be clear, I will NOT build T713, T719 and T819.
Q21. Can I load this rom on a variant devivce like LTE or S-pen version?
A21. The rom is built for the device explicitly listed. If you are an advanced user and understand TWRP, adb, odin, heimdall, you can try loading it on a LTE or S-pen variant by modifying the updater-script, but it may cause a bricked device, bootloops or non functionality of LTE/S-pen. You have been informed and warned!
Q22. Does this rom support OTA updates?
A22. No and I have no plans to add that functionality.
Q23. Why is there no LineageOS 19.1 build?
A23. I actually had a private 19.1 build back in Dec 2022, but stock camera didn't work at all so I decided to try build 20 to see if stock camera works in 20 (it does not either). Since I'm the sole builder for 18.1 and 20, I don't want to build, maintain and test 3 roms each month. Since 19.1 and 20 are very similar, I decided to just do 20 and drop 19.1 altogether. For those that need stock camera to work, use 18.1 (with caveats) or another rom where it works properly.
Q24. Okay, I understand the consequences and that this is ALPHA rom and willing to take the risks outlined, now where can I find the rom?
A24. You can download it from
https://sourceforge.net/projects/retiredtab/files/SM-T813/20/

Release notes
NOTE: All builds that I upload have been personally tested on my device to boot and function as described in post #1. Having said that, there's still a chance it won't work on your device due to human error, your configuration, your apps, etc. If it won't boot, always start with a complete wipe of everything and format your data in TWRP. This is known has a clean install. Backup your data before a clean install.
June 23, 2023
1. Initial 20 ALPHA public release.
2. Incorporates June 5th security patches as per https://review.lineageos.org/q/topic:"T_asb_2023-06"
3. If you are coming from stock rom or an older LineageOS version (example, 18.1), you MUST format your data in TWRP. Remember to backup your data and verify that restore data works before upgrading to 20.

Reserved.

[UNOFFICIAL][ROM]ALPHA LineageOS 20 for SM-T710 - June 23, 2023

LineageOS 20 UNOFFICIAL for 2015 Samsung Galaxy Tab S2 SM-T710 ONLY
Model: SM-T710 (wifi) - gts28wifi - 8.0" screen, Exynos 5433 SoC, no LTE
This is the ONLY model that the ROM will work on.​
You MUST READ posts 1-4 (about 10 minute read) before deciding to install this rom. If you think this is an unreasonable request, then stop reading now and find another rom. Thank you.
DISCLAIMER
I am not responsible for lost data, identity theft, lost money, security vulnerabilities, bricked devices or any other hardware or software malfunctions that comes as a result of flashing this rom.
All involved in bringing this build to you are working voluntarily on it in very limited spare time, and their other life commitments have much higher priority. Don't expect a prompt, or even any, response to questions and bug reports.
Before attempting to install this ROM
1. Ask yourself: would bricking your device be a disaster for you? If yes, don't try this ROM! It can't be guaranteed stable and reliable enough to depend on for daily use.
2. BACKUP YOUR DATA AND EXISTING ROM. Be prepared for a complete restore if anything goes wrong.
3. RESEARCH adb, fastboot, Odin/heimdall, and TWRP and how to use them, if not already familiar with these.
What works
1. bluetooth
2. wifi
3. brightness
4. external audio
5. GPS
6. audio through headphone jack
7. audio over bluetooth
8. selinux enforcing
9. DRM level 3 (SD definition)
10. deep sleep
11. camera
What doesn't work/What hasn't been tested
1. fingerprint is completely removed in 19.1. When I tested it in March 2022, it wasn't compatible with keystore2 and as I wrote in post 1891 at
https://forum.xda-developers.com/t/...t810-t815-t815y.3879302/page-95#post-85533725
it never worked properly after deep sleep. If you need fingerpint to work, stay with stock Samsung rom.
2. DRM level 1 (no HD definition). There's more detail in post 1891 above. I will not be trying to achieve level 1 for HD definition. If you need HD definition for your $treaming media, stay with stock Samsung rom.
3. full disk encryption has been deprecated in Android 13 (LineageOS 20).
4. If you charge the device while it's powered off and then want to power it on, you MUST wait at least 30 seconds AFTER disconnecting the charger cable before pressing the power button otherwise you might run into strange boot problems.
5. There has no been no fix for the “Connected to device. Can’t provide internet” (CPI). DO NOT ASK when this will be fixed. If/when it is fixed, it will be announced public in this thread.
If you have a lot of apps installed, you may run into CPI as we suspect it's possibly a slow memory leak. Depending on how many apps you have installed CPI may show up in 14 days. The only way to "fix" CPI is to reboot.
CPI may also show up if you have even just one app that somehow triggers a huge/large memory leak. Again, the only "fix" is to reboot.
We've spent a lot of time trying various kernel binder patches and updating the binder code as much as possible, but some users, NOT all, still run into CPI. Since I use Aurora Store and minimal apps, I never run into CPI like some pre ALPHA testers.
6. Device running really slow/laggy due to low memory. If you run a lot of apps that "phone home/connect to mothership", there's a possibility that it triggers a slow memory leak and the device, over time, becomes slow and laggy. You can see if you're low on memory by running
Bash:
$ adb shell dumpsys meminfo
Total RAM: 2,827,980K (status critical)
Free RAM: 256,196K ( 53,728K cached pss + 87,128K cached kernel + 115,340K free)
Used RAM: 3,638,878K (3,067,642K used pss + 571,236K kernel)
Lost RAM: -346,213K
ZRAM: 671,040K physical used for 1,412,244K in swap (1,413,984K total swap)
Tuning: 192 (large 512), oom 184,320K, restore limit 61,440K
When the above shows "status critical", that's a sign of a memory leak and you may get CPI or slow/laggy performance. The only "fix" is to reboot. It should show "status normal" after a reboot.
If you're a developer, we could use some help here determining where the memory leak is.
7. gapps. Some of you require gapps for whatever reason. I use Aurora Store for my purposes and thus have NO KNOWLEDGE of the current state of gapps.
There are various gapps projects (at least 5 in 2023). Each has pros and cons. It's your job to do the research and find a suitable gapps project. I suggest you allocate at least a couple of hours/days doing your own research. My rom works by itself fine without gapps. DO NOT talk about gapps in this thread.
I have created a new 20 thread for those wanting to discuss gapps at
https://forum.xda-developers.com/t/...sion-for-20-roms-sm-t710-and-sm-t810.4600455/
In there, you will find what pre ALPHA testers have been using.
8. Possibly other features/apps that I haven't tested or do not use.
Source Code
Kernel source code
https://github.com/retiredtab/andro...ersal5433-selinux/tree/lineage-20-8916-binder
See FAQ 1 for links to the device tree, manifest and build instructions in post #2.
Thanks
1. LineageOS team for source code.
2. LineageOS-UL team for merging, maintaining the legacy patches needed for old devices into one common repository so everyone can benefit.
https://github.com/orgs/LineageOS-UL/people
3. In alphabetical order.
@ananjaser1211
- answering 5433 related questions wrt to certain features.
@bmwdroid
- testing many pre ALPHA 20 builds and reporting the results
@lpedia
- testing many pre ALPHA T710 builds starting in late Oct 2022 and reporting the results
- verifying my build instructions work so that the technically inclined can build this from source
- building, maintaining and most importantly, testing the T710 20 builds before monthly security patches release
@metterschling
- suggestions, feedback on 20
- verifying my build instructions work so that the technically inclined can build this from source
@pflyaz
- testing many pre ALPHA 20 builds and reporting the results
@Yogi555
- testing many pre ALPHA 20 builds and reporting the results
- verifying my build instructions work so that the technically inclined can build this from source
- building, maintaining and most importantly, testing the T810 20 builds before monthly security patches release

Frequently Asked Questions. You MUST READ this before posting any questions. If you think this is unreasonable, then find another rom. Thank you.
QuestionAnswerQ1. Can I build this ROM for myself? Where are the source and kernel source files?A1. Yes, you can. The source files are listed below.
Kernel
https://github.com/retiredtab/android_kernel_samsung_universal5433-selinux
Device Tree
https://github.com/retiredtab/android_device_samsung_gts2-common-selinux
https://github.com/retiredtab/android_device_samsung_gts28wifi
Vendor
https://github.com/retiredtab/proprietary_vendor_samsung-selinux
The build manifest and instructions on how to compile from source are at
https://github.com/retiredtab/LineageOS-build-manifests/tree/main/20/exynos5433Q2. Is this ROM suitable as a daily driver?A2. It might be, depending on your requirements. You would need to try it yourself, with your preferred apps, to see if suits your purposes. I've been using it myself since Oct, 2022 with no major issues.Q3. What do I do if my app xyz doesn't work?A3. I can't help diagnose problems with random apps I know nothing about. If the app is critically important to you and it doesn't work on this ROM, go back to a ROM where it did work.Q4. Why is this ROM laggy and/or buggy?A4. The device will be noticeably slower if you're using any Gapps package. Consider going gapps-free. A lot of apps will work without Google's services, or there exist alternatives that will. Check out F-Droid, Aurora Store, NewPipe, etc.Q5. What TWRP should I use?A5. You MUST use TWRP 3.6.2_9. Get it from
https://sourceforge.net/projects/retiredtab/files/SM-T710/TWRP/Q6. Why should I use this ROM?A6. You don't have to! If you don't like it, go back to your old ROM.Q7. Will you offer monthly updates with security patches?A7. We plan to do so. We will try to update the ROM with the monthly security patches after LineageOS has released them, free time permitting. Each monthly build will be tested to make sure all the "What works" functionality listed in post #1 still works, before it's made available (which might in some cases delay the release).Q8. I'm a newbie. Can you provide step by step instructions?A8. We simply don't have the time to do this, but there are lots of tutorials, videos, etc online showing how to flash custom ROMs and how to deal with common problems. Newbie questions are also accepted in the XDA General Questions and Answers forum.Q9. Can I report a bug with respect to the ROM?A9. Yes, but you need to supply the following information. If you don't, I won't look at it.
Provide an adb logcat of the problem, and if possible describe how to reproduce it. Note that I can't help if it involves downloading any app I don't already use that requires payment or creating a userid/password.
To get a logcat, open a terminal window on your PC, connect your device to it via USB, and do this:
Code:
# clear the logcat first
adb logcat -c
# start logcat trace
adb logcat > problem.txt
# reproduce problem
# wait until problem has occurred,
# then stop trace by hitting ctrl-c
# zip the problem.txt file before uploading it.
Q10. How long will you build 20 for this device?A10. For now, 20 will be built for all of 2023. After that, we will make a decision depending on a number of factors.Q11. Do I need to erase everything and format my data before installing this ROM for the first time?A11. If you're coming from stock Samsung Android, or an earlier version of LineageOS, or a different custom ROM, you MUST 'clean flash': boot to TWRP recovery, wipe system, data, dalvik/art cache, and cache partitions, then Format Data, then install this ROM.
If you don't do this you're likely to run into problems, such as getting stuck at the boot animation for more than 5 minutes.Q12. What Gapps should I use?A12. Your choice! There are several well-known Gapps packages, such as NikGapps, BiTGapps and MindTheGapps. Do your own research as to what is the most reliable gapps option for you. As a courtesy to gapps users, I opened a thread at
https://forum.xda-developers.com/t/...sion-for-20-roms-sm-t710-and-sm-t810.4600455/
for you to discuss gapps. Do not discuss gapps in this thread. Thank you.
You could also consider Google alternatives, such as Aurora Store, which mirrors the Google Play Store apps but doesn't need any Google services itself. Many Play Store apps do not actually depend on Google services.
If you are going to install any Gapps package, follow the installation instructions given for that particular package.Q13. I'm having problems with Gapps. Can you tell me why it's not working?A13. I can't answer any questions about Gapps, because I don't use them. Ask your questions on the XDA thread for the Gapps package you're using.Q14. Why isn't my post answered?A14. There are several possible reasons: the question is answered in the FAQ (in which case it will be ignored completely); or it involves apps or operating systems that I don't use; or it's about Gapps, which I don't use; or I simply have not had time to answer any questions.Q15. What speed up/optimization tips do you suggest?A15. These steps can make a big difference to performance:
Turn off animations. Go to Settings > System > Developer options, scroll down to the Drawing section, and set Window, Transition and Animator scale all to "Animation off".
Don't install Gapps unless you depend on something that only Google is providing. Use Aurora Store to get your preferred Play Store apps - they will all be available on Aurora Store. You can choose to access this anonymously or use a Google account.
Don't run more than two apps at the same time. You can probably listen to music in the background and use a web browser at the same time.
Use a web browser with built-in adblock and privacy features, such as Brave.
Use NewPipe to watch your streaming content. It has built in adblock so you don't have to watch forced ads.
Look for apps that are open source, ad-free and lightweight.
Q16. Does this ROM support Magisk so I can root my device?A16. Magisk works with this ROM as reported by beta testsers, but that could change with any revision and changes by Google. However I don't use it myself and can't help with any related issues. Direct any questions about Magisk to the XDA Magisk forum.Q17. Will this ROM ever become official?A17. With 19.1 and up, legacy devices like ours will NEVER be official due to lack of ebpf support. See https://lineageos.org/Changelog-26/Q18. What is the difference between this ROM and others?A18. This ROM tries to be pure LineageOS with little or no modification. Other ROMs may come with a different UI, different bundled apps, etc.Q19. Will there be any major 20 code modifications in the future?A19. There may be some major modifications along with some slight tweaking to the SEpolicy, small bug fixes and minor code cleanup, but all the hard work - getting the rom up and running, and fixing all the major bugs - has been done.Q20. Why did you fork the trees?A20. I wanted my own private branch where I could make changes that would only affect my own personal builds.Q21. Can you build a variant of this device? For example, a LTE or S-pen version?A21. I cannot and will not try to build for a variant device if I don't physically have that device. I have to be able to boot and test it myself, and there's no guarantee that I can get those variant features working.Q22. Can I load this ROM on a variant device like LTE or S-pen version?A22. This ROM is for the device explicitly listed and will only work on that device. Do not try to install it on any other device.
ONLY if you are an advanced user and understand TWRP, adb, odin, heimdall, etc, you could try loading it on a LTE or S-pen variant by modifying the updater-script, but be warned: there are likely to be problems, including a bricked device, bootloops, or the ROM not being able to support the functionality of LTE/S-pen.Q23. Does this ROM have any wifi connection issues?A23. This ROM's wifi has been stable on the specified device ever since lpedia and I determined the root cause of the wifi problems back in July 2021 and re-installed the original S2 network 'blobs' with LOS 17.1.Q24. Is this ROM secure so I can do financial transactions?A24. Although Android monthly security patches do improve general security, this ROM's outdated kernel and old proprietary vendor blobs/drivers will NEVER get updates of any kind, and could have significant security holes.
In addition, although the ROM is SElinux enforcing, there's a good chance that the rules written (about 1000+ lines of code) have some errors.
If the device is rooted, this would further weaken the security.
With this information, it's up to you to make an informed decision about whether you trust this ROM to be secure enough for your financial transactions.Q25. How do I turn off the taskbar at the bottom of the screen?A25. Goto settings, system, buttons and disable taskbar.Q26. Okay, I understand the consequences and willing to take the risks outlined, now where can I find the ALPHA rom?A26. Downloads are at https://sourceforge.net/projects/lpedia-sf/files/gts28wifi-20/

Release notes
NOTE: All builds that I upload have been personally tested on my device to boot and function as described in post #1. Having said that, there's still a chance it won't work on your device due to human error, your configuration, your apps, etc. If it won't boot, always start with a complete wipe of everything and format your data in TWRP. This is known has a clean install. Backup your data before a clean install.
June 23, 2023
1. Initial 20 ALPHA public release.
2. Incorporates June 5th security patches as per https://review.lineageos.org/q/topic:"T_asb_2023-06"
3. If you are coming from stock rom or an older LineageOS version (example, 18.1 or 19.1), you MUST format your data in TWRP. Remember to backup your data and verify that restore data works before upgrading to 20.

Reserved.