Database Info

[Q] Building Kernels 101

Anyone have any information as to where I can go to learn how to build/compile a kernel for my nexus s 4g? Id like to take a feeble stab at it. Thanks!

Here are some guides I used for getting started:
» [How-To] compile the Nexus S kernel from source
» [HOW-TO] Compile AOSP Gingerbread + [ROM] Master AOSP
» Building Kernel from source - CyanogenMod Wiki
Please note that most of the time you cannot just follow the guides verbatim. Just use it as "guidelines" and adapt it to suit your development environment.
Also you should have basic to moderate understanding in Git in order to apply patches/mods to your kernel properly.

Thanks. Almost easier to pay someone, what with being lazy and all.

Yeah, that's what I do now -- using a "tried and tested by community" kernel/ROM is much easier for life.
I think there are enough kernel threads in XDA that you should find one that suits your needs, and you can send a donation to the developer to show you appreciation in his/her work

There are quite a few, yes. Although I want a 'feature from this kernel and a tweak from that kernel'...or 'Id use this one if it didnt have that feature'...so I just sit at stock...

Lol, sounds like a "walk in the middle path" philosophy
That's a good decision though, nowadays instead of spending time compiling my own kernel, I spend as much time in checking the Development forum -- looking for new kernel(s) update everyday. It's kinda addict once you've tried flashing them

Hey Tails,
I am trying to take a stab at compiling my own kernel too. How did it go for you? I am having problems myself.
Sent from my Google Nexus S using Tapatalk

suomaf said:
Hey Tails,
I am trying to take a stab at compiling my own kernel too. How did it go for you? I am having problems myself.
Sent from my Google Nexus S using Tapatalk
Click to expand...
Click to collapse
I completely abandoned my attempts at building kernels. Sorry.
I'll leave it to the vets
Sent from my Nexus S 4G using xda premium

I would also like to give it a go, wonder if there is anyone that can give me advice. I have sync repo but can not for the life of me find where the new kernel sources are.
Sent from my A500 using Tapatalk

suomaf said:
I would sol like to give it a go, winner if there is anyone that can give me advice. I have sync repo but can not for the life of me find where the new kernel sources are.
Sent from my A500 using Tapatalk
Click to expand...
Click to collapse
May be here?

suksit said:
May be here?
Click to expand...
Click to collapse
Thanks for the quick reply, I think I have repo sync'd and also done
Code:
git clone https://android.googlesource.com/kernel/samsung.git
But I end up with an empty directory called samsung with a hidden directory .repo
Is this correct? Is the 3.0 kernel for nexus s somewhere else?

Well I haven't update the kernel sources since kernel.org was down... However, I think this may also be a good starting point.

suksit said:
Well I haven't update the kernel sources since kernel.org was down... However, I think this may also be a good starting point.
Click to expand...
Click to collapse
Thank you very much, will try to git clone https://bitbucket.org/KalimochoAz/samsung-kernel-3.git
---------- Post added at 11:15 AM ---------- Previous post was at 11:01 AM ----------
sigh.. this is hard,
Code:
git clone https://bitbucket.org/KalimochoAz/samsung-kernel-3.git
Cloning into samsung-kernel-3...
error: RPC failed; result=22, HTTP code = 502
fatal: The remote end hung up unexpectedly
I am guessing maybe the server is down or something? because git clone worked for me when testing
git clone git://github.com/git/hello-world.git

suomaf said:
Thanks for the quick reply, I think I have repo sync'd and also done
Code:
git clone https://android.googlesource.com/kernel/samsung.git
But I end up with an empty directory called samsung with a hidden directory .repo
Is this correct? Is the 3.0 kernel for nexus s somewhere else?
Click to expand...
Click to collapse
Just finished cloning samsung.git from googlesource. I suppose the directory name should be .git? If so, from within samsung directory, type the following command:
Code:
git branch -a
This will list all branches in the repository. You should see something like this:
Code:
* master
remotes/origin/HEAD -> origin/master
remotes/origin/android-samsung-2.6.35-gingerbread
remotes/origin/android-samsung-3.0-ics-mr1
remotes/origin/master
If you want the kernel code for ICS (linux 3.0), type the following command:
Code:
git checkout android-samsung-3.0-ics-mr1
This will checkout the code from the corresponding branch name. If things go well, you should see something like this:
Code:
Checking out files: 100% (37465/37465), done.
Branch android-samsung-3.0-ics-mr1 set up to track remote branch android-samsung-3.0-ics-mr1 from origin.
Switched to a new branch 'android-samsung-3.0-ics-mr1'
Git will create a new local branch for you. To see it, just type git branch -a again.
Now it's time to play!

thanks boss,
Really appreciate you taking the time to do this, it was successful. Here I go to brick my nexus S

suomaf said:
thanks boss,
Really appreciate you taking the time to do this, it was successful. Here I go to brick my nexus S
Click to expand...
Click to collapse
lol
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No bricks so far, but has not been able to get the phone to boot. Did what I think is a default compile then took the ram disk from the phone. The damn thing just wont boot. Does this mean that I will have to compile the whole ics and use that ram disk? or am I just doing it wrong?

suomaf said:
No bricks so far, but has not been able to get the phone to boot. Did what I think is a default compile then took the ram disk from the phone. The damn thing just wont boot. Does this mean that I will have to compile the whole ics and use that ram disk? or am I just doing it wrong?
Click to expand...
Click to collapse
That sounds correct to me. However, I haven't done this for almost a year so I'll just try to recall from my memory =.= Usually the steps should be:
get the boot partition from the phone using dd?
use extract-bootimg.pl to extract the ramdisk
use mkbootimg to create a new boot image from the extracted ramdisk and your zImage
try it with fastboot boot newbootimage.img
Sorry that I couldn't be of more help

You have been great help. Thanks.
Sent from my Google Nexus S using Tapatalk

Just think about another way to do it: AnyKernel
BTW, it's my pleasure helping ppl to brick their phone lol

[Q] *NEEWB ALERT* better battery life with new kernel?

hi
im kind of new to som of this, although i have knowledge about root and custom roms, ive come across something i've never considered before, namely kernel :/ as i understand that the right kernel can extend your battery life and such, i get raather curious about wich kernel i should use or if i actually would benefitt at all.
at the moment i have icecoldsandwich 2.0.0 custom rom installed with CM9 kernel (installed it 30 min ago so havent had time to check battery performance on this rom).
what should i do? would i benefitt from another kernel?
cheers, and thank all of you for engaging in this community ive learned alot from just reading

you can't change kernel on CM9 coz there's none compatible with that ROM apart the one shipped with it; that rom is in deep developement you have to wait a while if you want other compatible kernels.
cheers

willywally93 said:
you can't change kernel on CM9 coz there's none compatible with that ROM apart the one shipped with it; that rom is in deep developement you have to wait a while if you want other compatible kernels.
cheers
Click to expand...
Click to collapse
Yep. All the ROMs have their preferred kernel anyway so you don't have much choice when it comes to kernels (at least not in the desire s section, not to say there's anything wrong with our kernels, Lowveld has done an amazing job with the kernels).
AOSP- Reaper kernel
Sense 3.5 - Endymion Kernel
Sense 3.0 - Hyperion Kernel
There are also two more kernels, Tiamat for AOSP and Unity v9 for sense. However, both these kernels are outdated now.

i see
well.... i have a reaaaaaal good feeling that there will be released a new version of the tiamat kernel veeeeeery soon :>
not sure if im allowed to say more :3 ive got my hands on something awesome

Silenti91 said:
i see
well.... i have a reaaaaaal good feeling that there will be released a new version of the tiamat kernel veeeeeery soon :>
not sure if im allowed to say more :3 ive got my hands on something awesome
Click to expand...
Click to collapse
Sorry, but i need proof to get excited!
Also, not to say you're not a trusted person, but you joined today! Trust has to be earned

dan-fish said:
Sorry, but i need proof to get excited!
Also, not to say you're not a trusted person, but you joined today! Trust has to be earned
Click to expand...
Click to collapse
okey... but first answer me this ... is it okay to upload stuff like that before official announcement?

Silenti91 said:
okey... but first answer me this ... is it okay to upload stuff like that before official announcement?
Click to expand...
Click to collapse
I wouldn't do it from a developer unless they gave you permission. But if it were from HTC I'd do it! I think a screenshot would suffice. Going to about phone can show you the kernel version.

dan-fish said:
I wouldn't do it from a developer unless they gave you permission. But if it were from HTC I'd do it! I think a screenshot would suffice. Going to about phone can show you the kernel version.
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Click to collapse
okey here it goes
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proof

Silenti91 said:
okey here it goes
proof
Click to expand...
Click to collapse
uhhhm,.... how do i upload pictures x)
w8 got it

Silenti91 said:
okey here it goes
proof
Click to expand...
Click to collapse
EDIT: got there
Wow sounds awesome! Now you've got me excited
But still I wouldn't release without permission from cayniarb

dan-fish said:
EDIT: got there
Wow sounds awesome! Now you've got me excited
But still I wouldn't release without permission from cayniarb
Click to expand...
Click to collapse
no are u crazy ^^ its his work so it should be him that releases it im just happy he gave the file to me ^^,
i can say the kernel seems to work great so u have reason to be excited

Silenti91 said:
no are u crazy ^^ its his work so it should be him that releases it im just happy he gave the file to me ^^,
i can say the kernel seems to work great so u have reason to be excited
Click to expand...
Click to collapse
Well congrats! I hope to see it around soon

dan-fish said:
Well congrats! I hope to see it around soon
Click to expand...
Click to collapse
yes his download section is down atm so maybe it showes up when it gets back online shouldnt be long at least

Just making sure, this is what a kernel is and does right?

Being I am trying to get more involved in roming, I am trying to understand other things like kernels. After searching about, I just wanted to be clear that I knew what a kernel was..Some clarification . Basically a kernel is like an engine to a car, like the central control system. It makes the phone and all functional and working. What it does for you depends on the phone you have (some kernels do not work with certain phones or may run better on another phone), kernel you are using (being there are many out there) and what works best for you (everyone has different needs and preferences).What it can do is increase speed, performance, battery life and etc. Am I somewhere in the ballpark?

ninjaman1025 said:
Being I am trying to get more involved in roming, I am trying to understand other things like kernels. After searching about, I just wanted to be clear that I knew what a kernel was..Some clarification . Basically a kernel is like an engine to a car, like the central control system. It makes the phone and all functional and working. What it does for you depends on the phone you have (some kernels do not work with certain phones or may run better on another phone), kernel you are using (being there are many out there) and what works best for you (everyone has different needs and preferences).What it can do is increase speed, performance, battery life and etc. Am I somewhere in the ballpark?
Click to expand...
Click to collapse
Yeah, it's like the engine, just make sure you flash a kernel that is for YOUR PHONE!!!! If not, brick city. Kernels are made for a certain phone, not interchangeable between phones, so only flash a kernel in the section for your phone.

yea i know the kernel I am probably going to flash is http://forum.xda-developers.com/showthread.php?p=19906779 it says all samsung roms so it should work

ninjaman1025 said:
yea i know the kernel I am probably going to flash is http://forum.xda-developers.com/showthread.php?p=19906779 it says all samsung roms so it should work
Click to expand...
Click to collapse
Why are you in the tmobile section? do you have a skyrocket or a tmo gs2? There is a faux kernal in our section as well.

Oh whoops wrong link. I was on another post here with that link so I guess that was still copied. Anywho, going to get the Faux 010m kernel which just released. Thanks btw

xcrazydx said:
Why are you in the tmobile section? do you have a skyrocket or a tmo gs2? There is a faux kernal in our section as well.
Click to expand...
Click to collapse
Faux's Skyrocket kernel is a branch from the Hercules kernel and all the info faux123 posted about general kernel info is the same and not specific to the phone. The architecture diagram comes straight from the general Android Operating System page on Wikipedia, which came from the Android dev guide here:
http://developer.android.com/guide/basics/what-is-android.html
OP, all the info/resources you'll want/need can be found either on the Android dev site:
http://developer.android.com
or their sister site, the Android Open Source Project (AOSP)
http://source.android.com/
Here' the link for the skyrocket branch of faux kernel:
http://rootzwiki.com/topic/14570-skyrocket263514010oc173ghzgpu-ocotguvslqbblnmar-09/

I already flashed Faux 10, jw anyway to know you have it?

ninjaman1025 said:
I already flashed Faux 10, jw anyway to know you have it?
Click to expand...
Click to collapse
Use CPU spy from the market, your kernel info will be on the bottom of the screen
---------- Post added at 01:10 PM ---------- Previous post was at 01:09 PM ----------
m4570d0n said:
Faux's Skyrocket kernel is a branch from the Hercules kernel and all the info faux123 posted about general kernel info is the same and not specific to the phone. The architecture diagram comes straight from the general Android Operating System page on Wikipedia, which came from the Android dev guide here:
http://developer.android.com/guide/basics/what-is-android.html
OP, all the info/resources you'll want/need can be found either on the Android dev site:
http://developer.android.com
or their sister site, the Android Open Source Project (AOSP)
http://source.android.com/
Here' the link for the skyrocket branch of faux kernel:
http://rootzwiki.com/topic/14570-skyrocket263514010oc173ghzgpu-ocotguvslqbblnmar-09/
Click to expand...
Click to collapse
I realize this, just making sure our friend isn't flashing all hercules stuff without knowing there is a skyrocket section.

ninjaman1025 said:
I already flashed Faux 10, jw anyway to know you have it?
Click to expand...
Click to collapse
You can us CPUSpy as crazyd mentioned, or if you have something like Elixir2, you can just go to the information section, and under software, you can see the Kernel info:
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thanks guys i love XDA

ninjaman1025 said:
thanks guys i love XDA
Click to expand...
Click to collapse
No problem, glad you got it sorted out!

[ROM][JB][4.3][OFFICIAL] Evervolv || 3.3.0p1 || AOSP || Nightlies

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What is Evervolv?
Evervolv is an AOSP (Android Open Source Project) rom. We're fully open sourced and encourage it with no restrictions. The work put into this rom is community driven and and Evervolv Project is made up of numerous members and contributors. And this whole time we were receiving 4.3 nightlies
Right now the current source we are working on is Jellybean (Android 4.3.x).
Current version: 3.3.0p1
Nightlies (starting 8.28.2013) available for testing. Once issues are re mediated, a release build will be posted.
Pre-Requisites:
1. CWM or TWRP
2. S-Off, or thorough understanding of how you work around S-On to get the kernel included in this ROM flashed. FAUX, CM kernels are not compatible and will result in functionality issues if it boots at all.
3. Desire to be helpful in an appropriate manner. Logcats, dmesgs, etc are very helpful, and necessary to assist.
4. Full data wipe/factory reset
Downloads:
http://www.evervolv.com/devices/speedy - Named "ev_speedy-nightly-2013.xx.xx-squished.zip"
This requires gapps for 4.3, do not use 4.2 gapps.

Where do we get the GApps?
Edit: I got them from HERE. 20130813
Edit2: Wow this works great right out of the box! Nightly 10-2

thanks, runs great so far. only issue i see right now is i cant take screenshots, keeps telling me storage might be in use but its not.

Confirmed on my end. Screenshot isn't working for me either. I'll try to get a logcat later tonight.

Here is the logcat I got when attempting to get a screen shot. I hope this helps.

It's an issue across a couple of msm7x30 devices. glacier being another one

elginsk8r said:
It's an issue across a couple of msm7x30 devices. glacier being another one
Click to expand...
Click to collapse
Glad to see this device still kicking!

I'm hoping to port some roms, need testers

Zpik said:
I'm hoping to port some roms, need testers
Click to expand...
Click to collapse
im probably one of only a few left using it but you can inbox me roms and ill try when i can

Still on the shift
Sent...

-somebody- said:
im probably one of only a few left using it but you can inbox me roms and ill try when i can
Click to expand...
Click to collapse
sure! I'll start tonight, but what you guys want? How about trying a cm10.2 backport?

Zpik said:
sure! I'll start tonight, but what you guys want? How about trying a cm10.2 backport?
Click to expand...
Click to collapse
sure, at this point i havent even been paying attention to what other phones are getting cause i cant escape the shift. if cm 10.2 was where they implemented more privacy from information grabbing apps then my answer is most definitely.

-somebody- said:
sure, at this point i havent even been paying attention to what other phones are getting cause i cant escape the shift. if cm 10.2 was where they implemented more privacy from information grabbing apps then my answer is most definitely.
Click to expand...
Click to collapse
Im on it, I pm you in a little while

How about source built instead

CNexus said:
How about source built instead
Click to expand...
Click to collapse
dont got ubuntu:silly:

uploading a build now.

I meant me
I have access to a build server :thumbup:

CNexus said:
I meant me
I have access to a build server :thumbup:
Click to expand...
Click to collapse
hect yeah go for it! It may come out more stable

ParanoidKang said:
hect yeah go for it! It may come out more stable
Click to expand...
Click to collapse
Syncing source now, I'll change the evervolv setup for CM tomorrow..

CNexus said:
Syncing source now, I'll change the evervolv setup for CM tomorrow..
Click to expand...
Click to collapse
I got a port test if anyone wants to try. And keep up the good work cnexus

[Kernel] CodeCraft™ Kernel Series [updated] Lollipop Powerhouse!

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Changelog
Stock: well.... its stock with exFat, compiled with Linaro
powerhouse: exFAT, OC to 2.5 UC to 2.68, Voltage control, Sweep2sleep, color control, fastcharge, device vibrate control, GPU OC to 600 Mhz
And also kexec-hardboot in the update
powerhouse RLS1: Bumped up voltages on the OC side Thanks @holla420 for testing, now it shouldn't reboot when running benchmarks . added sio, fiops, bfq and vr schedulers. added ondemandplus governor (might add more) added memutils from LG G3 (port in from 8960 boards)
CodeCraft-M8-4.4.4 is vzw source with all powerhouse commits added

Your back to kerneling

krazie1 said:
Your back to kerneling
Click to expand...
Click to collapse
yeah, its hard to stay away. I have a little more time now.

Nice. Missed ur kernels
Sent from my insanely powered M8 using Tapatalk

Omg you're back. I've been sticking with stock kernels because there are no good sense kernels for vzw

StarfishP said:
Omg you're back. I've been sticking with stock kernels because there are no good sense kernels for vzw
Click to expand...
Click to collapse
I appreciate it bud, these kernels are both really solid & stable

Evolutionmods said:
I appreciate it bud, these kernels are both really solid & stable
Click to expand...
Click to collapse
Hit me up on hangouts
Sent from my HTC6525LVW using Tapatalk

buckmarble said:
Hit me up on hangouts
Sent from my HTC6525LVW using Tapatalk
Click to expand...
Click to collapse
You got it bruh

Does your kernel include kexec hardboot patch?
Sent from my HTC6525LVW using Tapatalk

I have one built with that in it. Lemme get some coffee and I'll post one

Evolutionmods said:
I have one built with that in it. Lemme get some coffee and I'll post one
Click to expand...
Click to collapse
First off, thanks for making a kernel with that feature. I certainly enjoy fooling with MultiROM and that's a requirement for the host ROM.
At the same time, I don't know that the kernel posted is successful. I flashed the CodeCraft-M8_PH-kexec-hardboot.zip posted in the OP on my device running Santod's latest NuSense build. Using the MultiROM Manager, it states that the kernel does not have the kexec-hardboot patch.
I can't say I have high proficiency with MultiROM or what this specific kernel feature is otherwise, so let me know if there is a specific log that it would be useful for me to attach. I wasn't sure if a logcat would say much in this instance.

jskup said:
First off, thanks for making a kernel with that feature. I certainly enjoy fooling with MultiROM and that's a requirement for the host ROM.
At the same time, I don't know that the kernel posted is successful. I flashed the CodeCraft-M8_PH-kexec-hardboot.zip posted in the OP on my device running Santod's latest NuSense build. Using the MultiROM Manager, it states that the kernel does not have the kexec-hardboot patch.
I can't say I have high proficiency with MultiROM or what this specific kernel feature is otherwise, so let me know if there is a specific log that it would be useful for me to attach. I wasn't sure if a logcat would say much in this instance.
Click to expand...
Click to collapse
Okay so that one was my bad . Its in the code just wasn't initialized in the config. I have a new one cooking right now. If its not to much trouble, can you flash it to check if the problem persist?

Happy to. Watching for the new posting. Thank you for your efforts to the community.

jskup said:
Happy to. Watching for the new posting. Thank you for your efforts to the community.
Click to expand...
Click to collapse
All set, same name new zip

Still no luck. I installed the kernel once with Flashify and a second time just from recovery to be sure. In both cases, I receive the message that the kernel doesn't have the kexec-hardboot patch.

jskup said:
Still no luck. I installed the kernel once with Flashify and a second time just from recovery to be sure. In both cases, I receive the message that the kernel doesn't have the kexec-hardboot patch.
Click to expand...
Click to collapse
It shows it hasnt been downloaded yet. try the new one

Evolutionmods said:
It shows it hasnt been downloaded yet. try the new one
Click to expand...
Click to collapse
Not sure what is up with the download counter, but yes, I've tried that copy as well. Screenshot is attached of the feedback I get from the MultiROM Manager program (and yes, I know I didn't install the main MultiROM file yet. This still works for detecting kernel ability, or it has in previous builds). Please let me know if there is any other log source I can provide.

Well I got it working and new zip is uploaded

@Evolutionmods what's setting should I have to advoid reboots when running antutu?
Sent from my Insanely powered M8 using Tapatalk