Develop Bugs

[Q] Kernels?

Ok... can someone please tell me what HAVS, CFS and SVS means?

HAVS - no idea
CFS - http://en.wikipedia.org/wiki/Completely_Fair_Scheduler
SVS - no idea

lol... i guess google is my friend
HAVS (Hybrid Adaptive Voltage Scaling) What this does is provide SUPERIOR BATTERY
Really? Anyone else use these kernels? Whats the risk, is it risky like flashing a Radio?

KevAmiga said:
lol... i guess google is my friend
HAVS (Hybrid Adaptive Voltage Scaling) What this does is provide SUPERIOR BATTERY
Really? Anyone else use these kernels? Whats the risk, is it risky like flashing a Radio?
Click to expand...
Click to collapse
No, only thing is some undervolted kennels might not be stable so always nandroid before changing kernel.
Sent from my HTC Desire using XDA App

Brill - I have some Nandroid backups, so if anything goes wrong the recovery will still work, and I can restore... excellent. Thought so

AOSP Kernel for SENSE ROM?
http://forum.xda-developers.com/wiki/index.php?title=FAQ#Kernel
here's a link with "all" neccesary informations
--------------------------------------------------------------
i would like to add a new question in this thread:
is it possible to use an AOSP Kernel like: http://forum.xda-developers.com/showthread.php?t=893484
with my SENSE-ROM ? (currently using ReflexTSense http://forum.xda-developers.com/showthread.php?t=791315 )
thx

No, at least I know that way. You have to use a Sense kernel with a sense ROM, like this to run without problems.

so there's no option to use newer Kernels with Sense-ROM's ..
thx for the information

Sorry to break into your thread, but does it work the other way round? I mean, is it possible to use a Sense kernel with an AOSP rom?

sense with asop and the other way
i tride som ASOP Kernel with my SensHD Rom and it worked "booting
i found a flickerning screen but it worked; i refalashed a sense kernel
i think that the other "Way" should also work with some "issues"
greetings..
ps: i somewhere on thos forum found a discussion between two ROM-Programmers about using ASOP Kernel in Sense roms.
As far as i remember they both found the conclusion that sense-kernel are using differetn Graphicdrivers so that a asop kernel never will run "full" with a sense-rom but the ASOP Kernel COULD be modded in "future"

[Q] how do i choose the best kernel ??

hey guys
i have just flashed the leedroid rom, and i want to flash the latest kernel since kernels optimize the performance and speed... the thing is that i dont know how to choose kernels, and which one fits my rom and phone, add to the consequences of installing kernels...
i hope anyof u could help, or link me to any thread...
thanks in advance

As far as I know, snq is the only one who has updated the kernel for sense roms. But try them out.

Thank u
I didn't find it in everything desire thread
I would propose some explanation abt the reason of changing vilolts and wut does kernels improve exactly
Sent from my HTC Desire using XDA App

A kernel controls a lot of stuff and can be important. You can change stuff like CPU speed, performance increases. I don't know exactly what a kernel does.
Here's the link for snqs kernel. No idea why it isn't in the desire everything thread.
http://forum.xda-developers.com/showthread.php?t=1039004
Punched in..

[KERNEL] HO!NO! Palace...

To avoid mess up in tread i decide to separate kernel from Rom.
This is going to be my Kernel palace
GB Kernel V1 include:
Overclock to max stable 1836 mhz
Under-volt all frequency
New low power level (Saves ~8ma at battery for low fps apps)
Add 5 more frequency table
Use readl_relaxed and writel_relaxed
Add interactive, smartassv2, lagfree governor
Implementation of 2-Phase OnDemand
P930 Gingerbread Kernel V1 (Work on Nitro HD and Bell Optimus LTE)
SU640 Gingerbread Kernel V1
LU6200 Gingerbread Kernel V1
P930 CM9 Kernel V4
Mirror
HO!NO! GitHub

Sweet thank you ! Cant wait for a CM9 hehe
Sent from my LG-P930 using XDA

Thanks for all ur work!
Sent from my LG-P930 using xda premium

Advice
HO!NO! said:
To avoid mess up in tread i decide to separate kernel from Rom.
This is going to be my Kernel palace
GB Kernel V1 include:
Overclock to max stable 1836 mhz
Under-volt all frequency
New low power level (Saves ~8ma at battery for low fps apps)
Add 5 more frequency table
Use readl_relaxed and writel_relaxed
Add interactive, smartassv2, lagfree governor
Implementation of 2-Phase OnDemand
P930 Gingerbread Kernel V1 (Work on Nitro HD and Bell Optimus LTE)
SU640 Gingerbread Kernel V1
LU6200 Gingerbread Kernel V1
P930 CM9 Kernel to come when CM9 will be in RC stage....
Click to expand...
Click to collapse
Sir ,maybe you can improve your kernal for deep searching the cm9 kernal,hoping that would be a good resource for your ref.Meanwhile expecting your new ver Of your home-made kernal. keep up your job！

HO!NO! said:
To avoid mess up in tread i decide to separate kernel from Rom.
This is going to be my Kernel palace
GB Kernel V1 include:
Overclock to max stable 1836 mhz
Under-volt all frequency
New low power level (Saves ~8ma at battery for low fps apps)
Add 5 more frequency table
Use readl_relaxed and writel_relaxed
Add interactive, smartassv2, lagfree governor
Implementation of 2-Phase OnDemand
P930 Gingerbread Kernel V1 (Work on Nitro HD and Bell Optimus LTE)
SU640 Gingerbread Kernel V1
LU6200 Gingerbread Kernel V1
P930 CM9 Kernel to come when CM9 will be in RC stage....
Click to expand...
Click to collapse
Can u change the charging animation of LU6200 when it's power off. The original one is really ugly. Thank you very much.

great job! Thanks very much.

THX 4 UR HARD WORK 4 OUR LU su!
啤酒是必须的~

Can't wait for CM9 kernal! Anyone see an improvement in battery life with the current kernals?

Thank you for all your work in main this phone one of the best out there

HO!NO! said:
To avoid mess up in tread i decide to separate kernel from Rom.
This is going to be my Kernel palace
Click to expand...
Click to collapse
restored my phone to original att nitro hd rom, then flashed the corresponding kernel, wiped dalvik cache and rebooted.. now i dont have root access? any way to resolve this issue besides rerooting it.. the kernel shouldnt affect it right?

kumayam said:
restored my phone to original att nitro hd rom, then flashed the corresponding kernel, wiped dalvik cache and rebooted.. now i dont have root access? any way to resolve this issue besides rerooting it.. the kernel shouldnt affect it right?
Click to expand...
Click to collapse
Your original nitro rom is maybe not rooted...
And no kernel does not change one thing about root.

HO!NO! said:
Your original nitro rom is maybe not rooted...
And no kernel does not change one thing about root.
Click to expand...
Click to collapse
i rooted the stock att nitro rom with super on click, then i made a backup and thats what ive been using, everytime i flash the corresponding kernel, it says i have no root access
Edit: I just rerooted it using super one click and everything works fine now, thanks for everything

rsalan said:
Can't wait for CM9 kernal! Anyone see an improvement in battery life with the current kernals?
Click to expand...
Click to collapse
Wasn't much better than on Bell Stock ROM the first days... but now after some days with tweaking and battery calibration the best battery life i have had so far!

Cromson said:
Wasn't much better than on Bell Stock ROM the first days... but now after some days with tweaking and battery calibration the best battery life i have had so far!
Click to expand...
Click to collapse
What sort of tweaks?

rsalan said:
What sort of tweaks?
Click to expand...
Click to collapse
heres some tweaks
http://androidforums.com/triumph-al...-performance-tweaks-updated-04-03-2012-a.html
http://forum.xda-developers.com/showthread.php?t=1560588
http://forum.xda-developers.com/showthread.php?t=1227269
http://forum.xda-developers.com/showthread.php?t=1289554

init.d support
Any chance of adding init.d support? I have a set of sick tweaks that really promotes battery life and performance.
However, I can only install part of it (manually).

thomas.raines said:
Any chance of adding init.d support? I have a set of sick tweaks that really promotes battery life and performance.
However, I can only install part of it (manually).
Click to expand...
Click to collapse
init.d support is already in my rom, this is why i don't see important to make it native in the first version.
In next release it will be native.

Thank you very much

HO!NO! said:
init.d support is already in my rom, this is why i don't see important to make it native in the first version.
In next release it will be native.
Click to expand...
Click to collapse
Which ROM? I installed Kernelpan1c Nitro HD ROM and my wife is liking it very much (it's her phone). But she wants me to hook it up with my init.d scripts as she knows how much battery life and performance is improved. However, when I tried to add the init.d forlder manually, the phone soft bricked. I guess I should post this in the ROMs thread, but I am using this kernel, and as far as I knew, in order for init.d scripts to work, your kernel has to be compatable.

I love this kernel but I love to use cm9.
I know the developer here wants to wait cm9 to rc stage in order to make the kernel for cm9, I would like to ask if you can change your mind cos cm9 original kernel is so lagging. Pls help!
Sent from my LG-P930 using xda premium

[Q] Do you usually flash a kernal before or after the rom?

Hi guys,
It's been so long since I have flashed a new kernal, is it better to flash them before or after you flash a rom?
are there any recommendations you fine XDA members have for kernals if I want to use it with the latest AOKP
Thanks for the help!

Since most roms come with their own kernel, I flash the Rom first, then whichever kernel I plan on using.
Sent from my Galaxy Nexus using XDA

boot into recovery.
wipe wipe wipe
flash rom
flash gapps is needed
if want, flash desired kernel
reboot.
wait for all apps to sync,
if needed, reboot into recovery and flash a theme.
Sent from my Galaxy Nexus using Tapatalk

Thanks for the help!

MarcMaiden said:
Thanks for the help!
Click to expand...
Click to collapse
np
Sent from my Galaxy Nexus using Tapatalk

Kernel is always after the rom.
Rom's install a kernel themselves that will completely overwrite any kernel you had set.
I use LeanKernel. And stick to the stable versions.
But that's my preference. You'll have to flash a few to decide.
Kernel testing itself is a bit of a bore. You need to test each kernel for at least a full battery cycle to see how it responds for you.
Also keep in mind that you can tweak kernel settings like color control, sound control, undervolting, clock speeds, and cpu governors if you want more customization.

After the rom ... roms contain kernels so it overwrites any kernel installed already ...
Don't forget to wipe your Davlik Cache before flashing your kernel

Please Suggest a good order
custom Rom
Super Su
Gapps
custom kernel
or whichever order is good after ROM..?!!

How to tweak a kernel?
Jubakuba said:
Kernel is always after the rom.
Rom's install a kernel themselves that will completely overwrite any kernel you had set.
I use LeanKernel. And stick to the stable versions.
But that's my preference. You'll have to flash a few to decide.
Kernel testing itself is a bit of a bore. You need to test each kernel for at least a full battery cycle to see how it responds for you.
Also keep in mind that you can tweak kernel settings like color control, sound control, undervolting, clock speeds, and cpu governors if you want more customization.
Click to expand...
Click to collapse
GREETINGZ JUBA
Would just like 4 u 2 know that I most sincerely appreciate the knowledge that u put down in ur post, I found it 2 be most insightful & madly helpful. Now, as for that kernel tweaking u mentioned, wut is the tweaking process?, & where is the kernel located?, & lastly, how would I navigate 2 it'z location? Thx a mill in advance my lady peace. P.S. Luv the name.

Help here!

I want to know if I need to install a custom rom or a custom kernel or a combination of both so that I can overclock my phone(1ghz single core). Please help. Why is everybody so silent here, so unwilling to answer a simple question as this. My fourth post of the same question.

hey dude....
todopertin said:
I want to know if I need to install a custom rom or a custom kernel or a combination of both so that I can overclock my phone(1ghz single core). Please help. Why is everybody so silent here, so unwilling to answer a simple question as this. My fourth post of the same question.
Click to expand...
Click to collapse
if u install a custom rom it is obvious that a custom kernel will get installed automatically...
any way there is a app called setCpu that helps u overclocking the phone required your phone is rooted...
u can also use "seeder" an app that tries to add smothness to the kernel....

todopertin said:
I want to know if I need to install a custom rom or a custom kernel or a combination of both so that I can overclock my phone(1ghz single core). Please help. Why is everybody so silent here, so unwilling to answer a simple question as this. My fourth post of the same question.
Click to expand...
Click to collapse
You would only require a custom kernel for your purposes.
anurag.dev1512 said:
if u install a custom rom it is obvious that a custom kernel will get installed automatically...
any way there is a app called setCpu that helps u overclocking the phone required your phone is rooted...
u can also use "seeder" an app that tries to add smothness to the kernel....
Click to expand...
Click to collapse
Custom ROMs can be built with stock kernels so that's not always true.

hey listen...
Anu6is said:
You would only require a custom kernel for your purposes.
Custom ROMs can be built with stock kernels so that's not always true.
Click to expand...
Click to collapse
cyanogen offers cpu overcloacking but stock kernel doesnot offer this stuff..
if u build cyanogen with stock kernel then rom wont be smooth....

anurag.dev1512 said:
cyanogen offers cpu overcloacking but stock kernel doesnot offer this stuff..
if u build cyanogen with stock kernel then rom wont be smooth....
Click to expand...
Click to collapse
The question asked did not specify a specific ROM. The question was what would be required to perform OC. What is required is a custom kernel that allows tweaking. Telling someone if they install a custom ROM they automatically get a custom kernel is misinformation.

plzzz be clear
Anu6is said:
The question asked did not specify a specific ROM. The question was what would be required to perform OC. What is required is a custom kernel that allows tweaking. Telling someone if they install a custom ROM they automatically get a custom kernel is misinformation.
Click to expand...
Click to collapse
i think u need to read the question properly..
he is asking about custom kernel and rom as well....
if u use stock kernel then it would work only with aosp based roms with only minor changes not the change that allows processor tweaking...
and one more thing the stock kernels used to be part of custom roms of gingerbread ...