Database Develop

[Q] Replace Kernel in Cognition v2.3b8?

Hi Guys,
I just got my Captivate couple days ago. I were able to unlock, root, get a new ROM (Cognition v2.3b8) and install some apps. I'm looking to get a new kernel for the ROM. How would I go about flashing it to a different Kernel like SpeedMod K12I ? Thanks.

Sgs kernel flasher app in market
To be safe always disable lagfix prior. App is very easy to user and quick
Sent from me

adrian18w said:
Hi Guys,
I just got my Captivate couple days ago. I were able to unlock, root, get a new ROM (Cognition v2.3b8) and install some apps. I'm looking to get a new kernel for the ROM. How would I go about flashing it to a different Kernel like SpeedMod K12I ? Thanks.
Click to expand...
Click to collapse
I am a noob here. But I am wondering what are/is the benefits/risk of replacing the kernel that comes with Cog v2.3b8 with another. I recently flashed Cog v2.3b8 from stock (batch 1006), and find this is pretty much as stable as stock. Only issue is with GPS (which was hit and miss on stock). So do the benefits of replacing the kernel in Cog v2.3b8 outweigh the risks?
Thankshttp://media.xda-developers.com/images/icons/icon7.gif

Well kernels have different features and abilities in them. It depends what you want from your kernel. Some might support BLN while others will have OC/UC or just OC. Various combinations of options. You just need to make sure that the kernel/ROM/modem are from the same family, etc. I9000 or Captivate. If you flash a i9000 kernel into a Captivate ROM you might have issues.
Cog v2.3b8 is a Captivate ROM I believe. You can flash Kernels which are for it.

cog runs fine with an i9000 kernel so long as you also use an i9000 modem. i can't run the i9000 roms because of service drops but this set-up is still very good.

Kernel flash
adrian18w said:
Hi Guys,
I just got my Captivate couple days ago. I were able to unlock, root, get a new ROM (Cognition v2.3b8) and install some apps. I'm looking to get a new kernel for the ROM. How would I go about flashing it to a different Kernel like SpeedMod K12I ? Thanks.
Click to expand...
Click to collapse
If you want to install a new kernel over the existing kernel,
1. Download the Kernel from http://forum.xda-developers.com/showthread.php?t=893880
2. Go to CWM recovery. (directly or through ROM Manager)
3. Choose the zip from SD
4. Flash and Reboot.
Make sure that there is atleast one boot after the ROM is installed.
To confirm,
check Kernel Version in Settings-> About Phone
You should see something like
[email protected]#116

Kernel benefits/risks
jperiod said:
I am a noob here. But I am wondering what are/is the benefits/risk of replacing the kernel that comes with Cog v2.3b8 with another. I recently flashed Cog v2.3b8 from stock (batch 1006), and find this is pretty much as stable as stock. Only issue is with GPS (which was hit and miss on stock). So do the benefits of replacing the kernel in Cog v2.3b8 outweigh the risks?
Thankshttp://media.xda-developers.com/images/icons/icon7.gif
Click to expand...
Click to collapse
Well each kernel has it's own benefits.
For instance, Speedmod uses sztupy's Universal Lagfix unlike other Kernels that use Vodoo Lagfix.
The main differences would be in the speed and battery. Samsung uses 250hz (as default), firebird kernel uses 300Hz and Speedmod uses 500Hz. Doesn't change battery consumption much but provides more smoothness.
Then the RAM Available. It varies from Kernel to Kernel from 300-350MB.
Cappy Kernels are for Captivate Only because of reorientation fixes and button mapping.
Hope this helps

Need some clarification please

Hi there , I just need some info about some stuff about ROMs, kernels and modems.
I plan to flash the latest firefly ROM on my rogers Captivate (SGH-i896) and need a but of clearing up. Some question will be thrown your way
1- if I do flash the ROM, what and modem gets flashed with it? Or do I have to flash them separately?
2- whats the difference between speedmod and suckerpunch #59?
3-Is the lagfix included in the ROM or kernel (if it gets flashed with the ROM)?
4- what the heck is vodoo?
Thanks guys ....I did a lot of reading on different threads and somethings are worded differently and confuses me .

stephan001 said:
Hi there , I just need some info about some stuff about ROMs, kernels and modems.
I plan to flash the latest firefly ROM on my rogers Captivate (SGH-i896) and need a but of clearing up. Some question will be thrown your way
1- if I do flash the ROM, what and modem gets flashed with it? Or do I have to flash them separately?
2- whats the difference between speedmod and suckerpunch #59?
3-Is the lagfix included in the ROM or kernel (if it gets flashed with the ROM)?
4- what the heck is vodoo?
Thanks guys ....I did a lot of reading on different threads and somethings are worded differently and confuses me .
Click to expand...
Click to collapse
1. no
2. depends on what you like better
3. yes(usually)
4. a freaky spiritual thing cajuns do(lsu tiger fans and new orleans saints fans)
Sent from my SAMSUNG-SGH-I897 using XDA App

stephan001 said:
Hi there , I just need some info about some stuff about ROMs, kernels and modems.
I plan to flash the latest firefly ROM on my rogers Captivate (SGH-i896) and need a but of clearing up. Some question will be thrown your way
1- if I do flash the ROM, what and modem gets flashed with it? Or do I have to flash them separately?
2- whats the difference between speedmod and suckerpunch #59?
3-Is the lagfix included in the ROM or kernel (if it gets flashed with the ROM)?
4- what the heck is vodoo?
Thanks guys ....I did a lot of reading on different threads and somethings are worded differently and confuses me .
Click to expand...
Click to collapse
1. The ROM includes the modem so there's no need to flash one separately. And if I remember right, Firefly uses the JK4 Modem.
2. Suckerpunch includes the ability to overclock and/or undervolt which affects battery life and overall performance. I personally use speedmod because that's what was included with my ROM and I haven't decided to flash a new kernel.
3. Yes, the lagfix is included in the ROM and the kernel is (if I'm not mistaken) what controls the lagfix.
4. Voodoo is another set of custom tweaks and enhancements that improve a number of things including speed, audio, and video.
Hope that answers your question.

Jay1390 said:
1. The ROM includes the modem so there's no need to flash one separately. And if I remember right, Firefly uses the JK4 Modem.
2. Suckerpunch includes the ability to overclock and/or undervolt which affects battery life and overall performance. I personally use speedmod because that's what was included with my ROM and I haven't decided to flash a new kernel.
3. Yes, the lagfix is included in the ROM and the kernel is (if I'm not mistaken) what controls the lagfix.
4. Voodoo is another set of custom tweaks and enhancements that improve a number of things including speed, audio, and video.
Hope that answers your question.
Click to expand...
Click to collapse
Thank you, that really cleared up a lot

[Q] Switch kernels. Wipes?

Hi all.
I'd like to know what should I wipe to safely change from one kernel to the other.
Just flashing kernels, nothing else.
For example if I go from a CF kernel to a stock one.
In that case, will it be possible to wipe from a recovery menu even if I don't have access to CWM anymore?
Thanks a lot.

Kernel script cleaner is good when you changing kernels.

Seems to be for CM7, isn't it?
I don't mean to constantly change kernels so I don't mind wiping through recovery if necessary instead of using some extra app as long as this is the recommended procedure...

Look for lippol94 ultimate kernel cleaning script in the dev section...
There are 2 versions one for CM7 and the other for samsung rom's...
It will be best for changing kernel's

Bork84 said:
Look for lippol94 ultimate kernel cleaning script in the dev section...
There are 2 versions one for CM7 and the other for samsung rom's...
It will be best for changing kernel's
Click to expand...
Click to collapse
I both use and recommend this as well.

if all you are doing is going from CF kernel to stock a clean is not necessary as the CF kernel is mostly stock but with root added. A more comprehensive clean is only needed if moving back from a more heavily customized kernel or from one custom kernel to another.
A system cleanse also is recommended when moving from a custom rom to another and especially if moving back from a deodexed custom rom to an odexed one and after changing themes.

[Q] Overlocking a SGS GT-I9000

Hello all
I just wanna know if there is any way to Overclock my processor
If there is.. i need the required kernel and programs please
PS: my device is Samsung Galaxy S GT-I9000, 2.3.3, Gingerbread.jpjv6
Thx in Advance ( :

Search is your friend. Try looking in the development section yourself.

Thx, i found a question similar to mine
but the best answers's link is Invalid : (
http://forum.xda-developers.com/showpost.php?p=12353412&postcount=2

I am pretty much sure you need to be rooted for overclock. Are you?

lots of kernels which allow for OC. Several programs that allow you to monitor and set OC available on the market, most have a free version that you can try and then buy the pro version once you have made a choice. Some kernels allow for more user control and variance, others are more prescribed -- a lot of it is personal preference and so much is phone dependent: no 2 phones are the same in terms of what OC or UV settings they will sustain.
Lastly, most kernels will have their own group of users and advocates. Some have experimented extensively with alternate kernels, some less so, but all will have a passion for the kernel that is their personal preference. There really is no substitute for your own trial and error. Download 3 or 4 and try them with a stock rom -- root and use sgs kernel flasher -- flash a custom kernel, set your OC and use it for a day. Flash another, repeat the process and continue until you find your preference.
Having found the kernel you like best, then set about flashing a custom rom that plays nice with your chosen kernel.
Take about a week but at the end you will know what you like best and why.
Between flashes, clean cache and davlik cache -- keep a good backup of apps on your pc or external sd, and even better, completely cleanse the phone between kernels -- that will standardize things and allow each kernel to operate on a clean system.

b_0 said:
I am pretty much sure you need to be rooted for overclock. Are you?
Click to expand...
Click to collapse
Yes i am, and i used a lagfix "if that make difference".

Sorry i know i'm noob but i'm afraid to flash into a kernael which is not oc-able :S
So do i have to know any precautions first? or the CWM is enough to restore the original kernel?

its quite easy my friend download semaphore kernel 1.8.0 and flash it via odin or recovery and after flashing just go to semaphore script manager change ur overclock values.......too simple

And then use apps such Voltage Control (in the market) to select speed & voltage of the processor.

Thx all i appreciate all your help
and for guys having the same issue here's the topic that helped me alot..:
http://forum.xda-developers.com/showthread.php?t=966646
and i don't recommend OC the processor, "SpeedMod" kernel made me satisfied.

[Q] Kernel Compatibility Question GB KK1

I recently flashed my Captivate (I897) to stock leaked 2.3.5 I897UCKK1
I am trying to understand what my options are for rooting to regain wifi tethering capability. Unfortunately, I really don't understand the kernel interaction and the potential compatibility issues. Normally, I understand I just need to stay on a kernel that was sourced from the same version (in this case KK1).
Anyway, I am hoping for some information on what kernels might be OK to use with my current ROM. My wish list in a kernel at this point would be BLN, EXT4 Lagfix (Voodoo or new CWM) and Root. From reading, it sounds like there is a lot more support for KK4.. Maybe I need to move to a KK4 ROM as well?
Thank in advance for not flaming the noob (I hope)

Davensocal said:
I recently flashed my Captivate (I897) to stock leaked 2.3.5 I897UCKK1
I am trying to understand what my options are for rooting to regain wifi tethering capability. Unfortunately, I really don't understand the kernel interaction and the potential compatibility issues. Normally, I understand I just need to stay on a kernel that was sourced from the same version (in this case KK1).
Anyway, I am hoping for some information on what kernels might be OK to use with my current ROM. My wish list in a kernel at this point would be BLN, EXT4 Lagfix (Voodoo or new CWM) and Root. From reading, it sounds like there is a lot more support for KK4.. Maybe I need to move to a KK4 ROM as well?
Click to expand...
Click to collapse
I suspect you're right. KK4 does have a good following since it is the newest leak, and there are several KK4 based ROMs out there in active development that support lagfix.
You won't find BLN on any i897 ROMs, though. There's no source code from Samsung so there is no way for the devs to add it in. For that, you would need to use an i9000 ROM or a 2.2 i897 ROM.

Thank you!