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Froyo (2.2) for HUAWEI U8120 [based on AOSP] (under development)

Froyo 2.2.2 port for Huawei U8120.
Maybe it will work on Huawei U8100/U8110 series, but for now it is focused on U8120.
So I dont know what behavior has on U8100 etc.
I must say a big thanks to Tom_G for his awesome work, especially for his froyo port on pulse.Without his work and his posts
on modaco forum, I will not be able to accomplish this.
kalt kaffe's 2.6.29 kernel.
Android 2.2.2 from aosp with some codeaurora changes.
JIT enabled.
Working:
RIL
Audio
GPS
Bluetooth
Wifi
SD card
Sensors
TSCalibration from codeaurora(still the app needs some improvements.For now use a stick or pen when you calibrate the screen)
Not working/bugs:
camera
broken layout on dialer
sdcard cannot be mounted in pc
Its still under development.This is not a finished rom and its not fully tested.
Probably it has problems that I have not yet encountered.So I would not suggest you to try it,
except if you have some experience and you want to help.
I have tried to make it as plain and simple as it gets.No google apps, no bootanimation etc.When all bugs are fixed then I will include them or I will post
my rom.But there are guys that are more expert in rom cooking than me.
Here is a zip with already compiled image files if someone wants to try it and post any bugs/fixes that have found.I have also uploaded here gapps if someone wants them(gmail,market etc)
Code: https://github.com/tas0s
Device tree: https://github.com/tas0s/android_device_huawei_u8120
Try it at your own risk.
Im not responsible for any damage that this may cause.

v.1 initial build

How to build it:
- Install git and gpg (gnupg).
- Download repo - http://source.android.com/source/git-repo.html
$ mkdir android
$ cd android
$ repo init -u https://github.com/tas0s/platform_manifest.git
$ repo sync
- Extract necessary binaries
Some compiled code from the official eclair roms is re-used in froyo. Because some of this code is not opensources I cannot included in the git repository.
The files can be extracted from any u8120 eclair rom.
Place the rom zip in the android directory an rename it to u8120_update.zip
navigate to /device/huawei/u8120:
cd device/huawei/u8120
Then execute from the android directory
$sh device/huawei/u8120/unzip_files.sh
else you can extract them from a working u8120 phone with an eclair rom (check that adb is enabled)
$device/huawei/u8120/extract_files.sh
- Building the system
Once thats done you can start compiling.
Follow the aosp instructions on setting up the build environment. - http://source.android.com/source/download.html
After the environment is setup.
$ cd android
$ source build/envsetup.sh
$ lunch
Select the device u8120.
$ make
I recommend using multiple threads for make if you have a multi core/processor system. By default make will use
1 thread (-j1), set it to use 2*NumberOfCPUsAvailable (so on my dual core -j4). Reducing the number of threads used will reduce the impact on
system performance while the build is running.
The output will be image files in {buildroot}/out/target/product/u8120/. Flash with fastboot.
$ fastboot flash boot out/target/product/u8120/boot.img
$ fastboot flash system out/target/product/u8120/system.img
$ fastboot flash userdata out/target/product/u8120/userdata.img
$ fastboot reboot
For some reason the generated boot.img fails to boot.Maybe I have something wrong about kernel base etc in the BoardConfig.mk.
For now just use the ramdisk.img and the provided kernel and pack it with dsixda's kitchen or with the huawei-u8100 tools that have been posted on the forum.
Then just use fastboot as stated above.

for the future

thnx for the gifts up to it tomorrow

A question about camera problem, only video or all features?

bitye said:
A question about camera problem, only video or all features?
Click to expand...
Click to collapse
The camera fails after a few secs.When an image appears in the preview window.
I have read that the the way that android handles camera has changed in froyo.In cyanogen they are using a libcamera2 (just libcamera with a few changes I think so it can work with the new framework).
As you can see in the BoardConfig.mk I have already include the libcamera2 statements but not the lib
When I manage to get some free time I would try the libcamera2.Maybe until the end of the week or sooner.

Ρε πατριδα αξιζει η rom ή οχι;

tas0s said:
For some reason the generated boot.img fails to boot.Maybe I have something wrong about kernel base etc in the BoardConfig.mk.
For now just use the ramdisk.img and the provided kernel and pack it with dsixda's kitchen or with the huawei-u8100 tools that have been posted on the forum.
Then just use fastboot as stated above.
Click to expand...
Click to collapse
There's a little fix using bootbuilder for U8120, see this post:
http://android.modaco.com/content/t...l-r1-bootbuilder-for-pulsemini-alpha-release/
In the 6th reply you can find the info you could need it
Good luck!

Hi can you tell me on wich kernel it runs?
the 2.6.32 or2.6.29?
and if wiifi is completly fixed no crashes sleep works mac adress?
thanks

calibration fixed at this repo?

larissamafia said:
Ρε πατριδα αξιζει η rom ή οχι;
Click to expand...
Click to collapse
Πατριωτάκι δεν είναι για καθημερινή χρήση ακόμα.Γιαυτό δεν έχω βγάλει και έτοιμη rom.

@Shiftok:
The calibration is integrated in the framework etc but it has some small issues.
As I say in the first post, it needs improvement.
@Cedric123:
Im using 2.6.29 kernel.The wifi works normally.If I remember right and MAC address.

tas0s said:
@Shiftok:
The calibration is integrated in the framework etc but it has some small issues.
As I say in the first post, it needs improvement.
@Cedric123:
Im using 2.6.29 kernel.The wifi works normally.If I remember right and MAC address.
Click to expand...
Click to collapse
ah okey
does this work?
i extract boot.img
put my own zImage in it
repack boot.img
start Phone?
i rly want my own kernel in the ROM with my overclock funtion adn all my +kalt+kaffes optimizations

cedric123 said:
ah okey
does this work?
i extract boot.img
put my own zImage in it
repack boot.img
start Phone?
i rly want my own kernel in the ROM with my overclock funtion adn all my +kalt+kaffes optimizations
Click to expand...
Click to collapse
The kernel Im using is kalt kaffe's kernel.So I think that if you just replace the kernel and the kernel modules in /system/lib/modules you will be fine.
Im uploading now a zip with the compiled images.
It has the problems I mention in the first post etc.
Just an observation.If the calibration isnt correct the screen is always on landscape mode Propably because it gets wrong screen dimensions.So if you see something like that, calibrate your screen with the TSCalibration app.
When im done with the camera, I will fix the calibration bugs.

Hi. Im testing your rom.
I cannot mount the sdcard on computer. when i press to activate usb storage it does nothing in computer.
EDIT - i cant install anything because i dont have a file explorer to see the sdcard files. can you please add one or make an .img with the stock apps

joilaroi said:
Hi. Im testing your rom.
I cannot mount the sdcard on computer. when i press to activate usb storage it does nothing in computer.
EDIT - i cant install anything because i dont have a file explorer to see the sdcard files. can you please add one or make an .img with the stock apps
Click to expand...
Click to collapse
Thank you very much for the feedback joilaroi.I have updated the first post with the sdcard bug.I tried myself and you are right.I will try to fix it.
As I know the stock android froyo hasnt any file manager/explorer.Maybe we can get it from cyanogens.
For now, you can do this.Flash the gapps update that I have in the first post,setup market etc and download a file manager from the market(ex.astro file explorer).

tas0s said:
Thank you very much for the feedback joilaroi.I have updated the first post with the sdcard bug.I tried myself and you are right.I will try to fix it.
As I know the stock android froyo hasnt any file manager/explorer.Maybe we can get it from cyanogens.
For now, you can do this.Flash the gapps update that I have in the first post,setup market etc and download a file manager from the market(ex.astro file explorer).
Click to expand...
Click to collapse
thanks. its what i am doing. if i find anything i will give feedback
EDIT - Cant install superuser and have permissions. it downloads su-2.3.1-bin-signed.zip to sdcard but its corrupted. maybe its better if its already on .img
Im getting more MFLOPS with 633Mhz in this rom than with 691Mhz with the other kernel. its now with 4.45 MFLOPS vs 4.1MFLOPS. Nice
Do you know where i can find su-2.3.1-bin-signed.zip?

Ubuntu 10.10 x64 under W7 VMWare will be enought for compile?
PC: C2D [email protected],2GHZ 8GB RAM
Laptop: Lenovo T410 i5 vPro 2,4GHz Quad Core 4GB RAM

I think yes

[HowTo] Compile the Kernel Source Code for the HTC One XL

Hi guys!
Someone requested a tutorial on how to build the kernel source code, so I thought I might as well do it I'll give you a bit more information too.
Maybe this will kick start kernel development a little bit too. Who knows.
Anyway:
1. Set up your build environment as per this guide by AOSP here: http://source.android.com/source/initializing.html
This guide will be primarily aimed at Ubuntu, but it should be easy enough to do on other Linux PCs. Ubuntu is highly recommended. And don't ask about Windows.
2. Download the toolchains: http://code.google.com/p/rohan-kernel-evita/downloads/detail?name=toolchains.tar.gz&can=2
I've hosted both GCC 4.4 and GCC 4.6 (prebuilt) on my Google Code page. These are for Linux.
Download the toolchain package here: http://code.google.com/p/rohan-kernel-evita/downloads/detail?name=toolchains.tar.gz&can=2
Then un-tar the archive and extract it to your home folder so that the path to the toolchain directories are ~/toolchain/whatever-one-you-want
3. At this point you can decide which kernel source you want to download. There are really two sources.
The first choice is getting it from HTC Dev directly. This is good if you want to build your kernel for a Sense 4 ICS ROM. If you want to build for AOSP/JB, then scroll down below all the following HTC stuff.
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
To use HTC's source:
Go to HTCdev.com and make an account. Then download the source code for our device (I'd recommend the "One X" source under carrier "AT&T" version "2.20". Let the zip file download and extract it to your home folder (so the path is /home/user/evita-ics..../
To build HTC's source, run these commands:
Code:
cd ~/evita-ics-whatever_the_directory_is_named
export ARCH=arm
make elite_defconfig
Second command is saying what type of architecture we want (we are compiling for ARM processors, so we want ARM)
Third command is saying to make the default config for our device (whose hardware is codenamed "elite")
Then to build the actual kernel:
Code:
make -j# ARCH=arm CROSS_COMPILE=~/toolchain/arm-eabi-4.4.3/bin/arm-eabi-
In the command above, there is "-j#". Replace the "#" with the number of CPUs you have.
Ask me about it if you need help. That should be it! Let the build go and in a few minutes you should have a zImage file located at ~/evita-ics-..../arch/arm/boot. That is the actual kernel.
To test out the zImage (kernel), connect your device via fastboot mode and type:
Code:
fastboot boot /path/to/zImage
Combined with the ramdisk, thats what makes the boot.img file. Eventually if you want to distribute your kernel, you should use an installer that injects the zImage into the boot.img or combine the zImage with a ramdisk to make a boot.img. I can do a tutorial on that later on as well.
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
To get the "other" source:
This source is based off of HTC's source and includes other devices as well in it (the One S and Evo 4G LTE). Its good if you want to build JB AOSP kernels.
To download this kernel source do this:
Code:
mkdir ~/kernel
cd ~/kernel
git clone https://github.com/CyanogenMod/android_kernel_htc_msm8960.git -b android-msm-evita-3.0
This version also includes a number of optimizations and odd bug fixes present in the HTC version.
To build this second source, run these commands:
Code:
cd ~/kernel/android_kernel_htc_msm8960
export ARCH=arm
make elite_defconfig
Second command is saying what type of architecture we want (we are compiling for ARM processors, so we want ARM)
Third command is saying to make the default config for our device (whose hardware is codenamed "elite")
Then to build the actual kernel:
Code:
make -j# ARCH=arm CROSS_COMPILE=~/toolchain/arm-linux-androideabi-4.6/bin/arm-eabi-
In the command above, there is "-j#". Replace the "#" with the number of CPUs you have.
Ask me about it if you need help. That should be it! Let the build go and in a few minutes you should have a zImage file located at ~/evita-ics-..../arch/arm/boot. That is the actual kernel.
To test out the zImage (kernel), connect your device via fastboot mode and type:
Code:
fastboot boot /path/to/zImage
Combined with the ramdisk, thats what makes the boot.img file. Eventually if you want to distribute your kernel, you should use an installer that injects the zImage into the boot.img or combine the zImage with a ramdisk to make a boot.img. I can do a tutorial on that later on as well.
-----------------------------------------------------------------------------
The second option is also a bit better as it uses the 4.6 toolchain instead of GCC 4.4. HTC's source doesn't work with GCC 4.6 so it can't be used without changes that the second source has.
If you have any questions, feel free to post here, message me on twitter (@rohanXm), chat me on IRC (#HTC-One-XL) or PM me!
If this helped you, please consider hitting the donation link under my username on the left. Donations are never required but always appreciated.

Instead of downloading cm10 the readme inclided with the HTC source has directions for getting a tool chain which will compile the source.
Sent from my HTC One X using Tapatalk 2

Perfect. Now I just have to read.
Sent from my HTC One XL bumping it

rohan32 said:
Code:
repo init -u git://github.com/CyanogenMod/android.git -b jb
Click to expand...
Click to collapse
FYI, It looks like the branch name has changed. When I changed "jb" to "jellybean" the repo init command worked.

Rohan. You are one bad MF'er
Sent from my twin turbo'ed OneXL rocking rezound beats

rohan32 said:
2. You can either try to find a standalone package of the precompiled toolchain, or you are going to need to download a ROMs source. I'd recommend downloading a ROMs source since I've never found a good toolchain that worked for me. If you find one that works, post below
For now we will download CM10 since that seems like the defacto standard.
Click to expand...
Click to collapse
I downloaded the 2.20.502.7 kernel source and when I extracted it there was a file named evita_readme.txt which gave another, possibly more "official", location for downloading a toolchain:
--Please follow below command to download the official android toolchain: (arm-eabi-4.4.3)
git clone https://android.googlesource.com/platform/prebuilt
Click to expand...
Click to collapse
I just performed a build with this toolchain but got this error when I attempted to load zImage via fastboot:
c:\>fastboot flash boot zImage
sending 'boot' (5140 KB)...
OKAY [ 1.044s]
writing 'boot'...
FAILED (remote: image error! (BootMagic check fail))
finished. total time: 1.077s
Click to expand...
Click to collapse
I'm not sure if this is caused by the toolchain or if I screwed something up. Have you ever seen this error before?
EDIT: Ok I see what I did incorrectly. The zImage needs to be "Combined with the ramdisk". You wouldn't know how to perform this operation... would you?

denversc said:
I downloaded the 2.20.502.7 kernel source and when I extracted it there was a file named evita_readme.txt which gave another, possibly more "official", location for downloading a toolchain:
I just performed a build with this toolchain but got this error when I attempted to load zImage via fastboot:
I'm not sure if this is caused by the toolchain or if I screwed something up. Have you ever seen this error before?
EDIT: Ok I see what I did incorrectly. The zImage needs to be "Combined with the ramdisk". You wouldn't know how to perform this operation... would you?
Click to expand...
Click to collapse
You are trying to flash a zImage
To my knowledge, only booting zImages work on this device. For the time being just boot the zImage (use fastboot boot zImage)
I will make a tutorial on how to combine the zImage created with a ramdisk to make a boot.img when I get the chance

denversc said:
FYI, It looks like the branch name has changed. When I changed "jb" to "jellybean" the repo init command worked.
Click to expand...
Click to collapse
Oops, my bad! That was a mistake. AOKP uses -jb and CM uses -jellybean so I got them switched fixed now

Out of any device I've seen more people actually interested in helping and learning to help then any other community. I've watched noobs become less noobish.. I've watched skizz learn how to make themes. Hell I've learned 10 fold what I knew before this phone myself.
That is beautiful, and now such an informed, helpful post such as this.
Have great Sunday you guys! I think I might give this a shot!
Sent from my One X

I'll streamline this process in a bit, so that you don't need to download CM10
Edit: cleaned up post, now I'm uploading just the toolchains. Its a tar.gz archive, around 150mb. Much better than downloading the entire CM10 source

rohan32 said:
You are trying to flash a zImage. To my knowledge, only booting zImages work on this device. For the time being just boot the zImage (use fastboot boot zImage)
Click to expand...
Click to collapse
Thanks for your response, rohan. You are absolutely right: I was incorrectly attempting to flash zImage straight to the boot partition, and the error produced by flashboot was justified. I have since successfully "tested out" my compiled zImage by flashing it via "fastboot boot zImage" and it worked like a charm! I ported the modifications from sbryan's Blackout BeastMode kernel and I am now able to OC to 2106 MHz and UC to 192 MHz. It's been running solid for the past few hours at least
Of course, the kernel reverts back to the one stored in the boot partition after a reboot, and I want my shiny new kernel to "stick". I've done a bit of research on this topic and found some information about combining my zImage with a ramdisk into a "real" boot.img but have not yet been successful in creating a boot.img which does not bootloop after flashing it.
For example, I found an article on xda called Basic Kernel Kitchen for Minor Kernel Tweaking which points to a "kitchen sink" tool for creating a boot.img from a zImage and a ramdisk. My problem is that I don't know where to get or how to make a ramdisk. So I tried using the ramdisk from the boot.img of the ROM that I am currently running (CleanROM 4.5 DE) but just got into a bootloop. I've since been doing some yard work today so haven't gotten back to investigating further.
I also found another program named abootimg which can also produce a boot.img from a zImage abd a ramdisk, but when I tried it an error message about my zImage being "too big" was produced.
If it's not obvious yet, I am kind of fumbling around in the dark as compiling and deploying custom kernels is completely new to me! But this post was the most valuable resource I've come across in getting to this point. Thanks so much for writing it! I eagerly await your next article about creating the boot.img
---------- Post added at 06:05 PM ---------- Previous post was at 05:50 PM ----------
rohan32 said:
cleaned up post
Click to expand...
Click to collapse
Thanks for cleaning up the post rohan. I have a few follow-up questions/comments:
missing toolchains link -- the post says "Download the toolchains:" but there is no link to download anything... did you forget to paste the link?
official toolchain -- That's great that you uploaded the toolschains to save tonnes of bandwidth. The CM10 source was taking a VERY long time for me to grab. However, I imagine some people (like me) would prefer to get the toolchain from an "official" source. In the "evita_readme.txt" file of the kernel sources downloaded from HTC dev it instructs one to use the official sources from "git clone https://android.googlesource.com/platform/prebuilt". This is the toolchain that I used and it successfully built the zImage.
ko files -- I noticed in the ZIP file for Blackout BeastMode, in additional to installing the zImage it also puts a bunch of "ko" (kernel modules I believe) into the /system partition (eg. qce40.ko). Should I also be deploying .ko files from my build to the device?
Thanks!

denversc said:
Thanks for your response, rohan. You are absolutely right: I was incorrectly attempting to flash zImage straight to the boot partition, and the error produced by flashboot was justified. I have since successfully "tested out" my compiled zImage by flashing it via "fastboot boot zImage" and it worked like a charm! I ported the modifications from sbryan's Blackout BeastMode kernel and I am now able to OC to 2106 MHz and UC to 192 MHz. It's been running solid for the past few hours at least
Of course, the kernel reverts back to the one stored in the boot partition after a reboot, and I want my shiny new kernel to "stick". I've done a bit of research on this topic and found some information about combining my zImage with a ramdisk into a "real" boot.img but have not yet been successful in creating a boot.img which does not bootloop after flashing it.
For example, I found an article on xda called Basic Kernel Kitchen for Minor Kernel Tweaking which points to a "kitchen sink" tool for creating a boot.img from a zImage and a ramdisk. My problem is that I don't know where to get or how to make a ramdisk. So I tried using the ramdisk from the boot.img of the ROM that I am currently running (CleanROM 4.5 DE) but just got into a bootloop. I've since been doing some yard work today so haven't gotten back to investigating further.
I also found another program named abootimg which can also produce a boot.img from a zImage abd a ramdisk, but when I tried it an error message about my zImage being "too big" was produced.
If it's not obvious yet, I am kind of fumbling around in the dark as compiling and deploying custom kernels is completely new to me! But this post was the most valuable resource I've come across in getting to this point. Thanks so much for writing it! I eagerly await your next article about creating the boot.img
---------- Post added at 06:05 PM ---------- Previous post was at 05:50 PM ----------
Thanks for cleaning up the post rohan. I have a few follow-up questions/comments:
missing toolchains link -- the post says "Download the toolchains:" but there is no link to download anything... did you forget to paste the link?
official toolchain -- That's great that you uploaded the toolschains to save tonnes of bandwidth. The CM10 source was taking a VERY long time for me to grab. However, I imagine some people (like me) would prefer to get the toolchain from an "official" source. In the "evita_readme.txt" file of the kernel sources downloaded from HTC dev it instructs one to use the official sources from "git clone https://android.googlesource.com/platform/prebuilt". This is the toolchain that I used and it successfully built the zImage.
ko files -- I noticed in the ZIP file for Blackout BeastMode, in additional to installing the zImage it also puts a bunch of "ko" (kernel modules I believe) into the /system partition (eg. qce40.ko). Should I also be deploying .ko files from my build to the device?
Thanks!
Click to expand...
Click to collapse
Hey!
Sorry, set it to upload then got distracted Link posted
The reason why your boot.imgs bootloop is because there is a special ramdisk address that needs to be set when combining the ramdisk with the zImage, and most kitchens don't support this. You also need to set the address after setting the base value.
I will post a guide on how to make it a real boot.img whenever I get the chance.

I'm telling you people, Rohan is a BOSS. Most helpful dev I know.
Sent from my HTC One XL using xda app-developers app

rohan32 said:
Hey!
Sorry, set it to upload then got distracted Link posted
The reason why your boot.imgs bootloop is because there is a special ramdisk address that needs to be set when combining the ramdisk with the zImage, and most kitchens don't support this. You also need to set the address after setting the base value.
I will post a guide on how to make it a real boot.img whenever I get the chance.
Click to expand...
Click to collapse
I have the zImage thanks to your tutorial, but I want to know how to create the kernel zip, whenever you have time will be amazing if you can post a guide, I'm really looking forward to that guide, because i haven't been able to locate a guide that works
Sent from my HTC One XL using xda premium

rohan32 said:
Hi guys!
Second command is saying what type of architecture we want (we are compiling for ARM processors, so we want ARM)
Third command is saying to make the default config for our device (whose hardware is codenamed "elite")
Then to build the actual kernel:
Code:
make -j# ARCH=arm CROSS_COMPILE=~/toolchain/arm-linux-androideabi-4.6/bin/arm-eabi-
Click to expand...
Click to collapse
This is the correct make for "other source" kernel.
Code:
make -j# ARCH=arm CROSS_COMPILE=~/toolchain/arm-linux-androideabi-4.6/bin/[COLOR="Red"]arm-linux-androideabi-[/COLOR]

Can you make a tutorial on how to insert governors into a kernel?

Compiling problem
Hey man,
Please help me I followed your article but when I try copile with:
make -j2 ARCH=arm CROSS_COMPILE=~/toolchain/arm-eabi-4.4.3/bin/arm-eabi
I got something like this:
/home/martin/toolchain/arm-eabi-4.4.3/bin/../lib/gcc/arm-eabi/4.4.3/../../../../arm-eabi/bin/as: error while loading shared libraries: libz.so.1: cannot open shared object file: No such file or directory
Thanks
UPDATE:
now its work
I went deeper and install lib32z1 with "sudo apt-get install lib32z1"... now its work

My device repositories are not available on github, But I got device tree and vendor blobs by making changes in similar device repo. That reference device's kernel's lineageos_defconfig is situated in htc msm8974 kernel repo. So how can I get lineageos_defconfig for my device, and which other my device related kernel files(.dtsi or any other) I have to push in htc msm8974 repo and get those files to make things ready for build?
Please help......

compile google sources with samsung ICS

Hi,
i'm trying to compile google sources version 4.0.4 with samsung sources from opensource samsung
From samsung sources i've only used the platform files. I've done all the steps that are in the platform readme:
How to build Mobule for Platform
- It is only for modules are needed to using Android build system.
- Please check its own install information under its folder for other module.
[Step to build]
1. Get android open source.
: version info - Android gingerbread 4.0.4
( Download site : source android)
2. Copy module that you want to build - to original android open source
If same module exist in android open source, you should replace it. (no overwrite)
# It is possible to build all modules at once.
3. Check module is in 'build\core\user_tags.mk'
If not, you should add your module name in it.
ex1) external\libjpega : Write "libjpega \" into "build\core\user_tags.mk"
ex2) external\libexifa : Write "libexifa \" into "build\core\user_tags.mk"
4. In case of 'external\bluetooth',
you should add following text in 'build\target\board\generic\BoardConfig.mk'
BOARD_HAVE_BLUETOOTH := true
BOARD_HAVE_BLUETOOTH_BCM := true
5. excute build command
./build.sh user
The command user was ./build.sh eng
Before running this command i've installer jdk 6 and follow the steps from android initializing
the ./build.sh eng run with success and after this i've run the make.
Some hours later i've got a new folder "OUT", inside there is a system folder but i've tryed to flash this folder with odin
and no success.
What am i doing wrong?
Thanks.

Trying to build the kernel + modules?
If i understand what your trying to do, Install new kernel and modules?
!!!!!Before you try this, do some research for your device and make sure this is the correct action!!!!!
you are looking for a file called: zImage
It should be in <build path>/arch/arm/boot/
To install the new kernel, you put your device into fastboot
Code: adb reboot-bootloader
Then you can install the new kernel:
Code: fastboot flash zimage /<path to your zImage file>/zImage
Then you can boot your device and manually copy over the modules.
Note: I didn't see in your steps where you mentioned configuring the kernel, are you doing this?

Thanks for your reply.
the kernel i've already compiled like you mentioned and it is ok i've flashed the zImage.
But there is another part that is the platform module that corresponds to the system.
When you have a Rom there are 3 things inside:
- boot.img that has the zImage (kernel)
- meta-inf
- system
i'm changing the code in one file that corresponds to the nfc part and them compile the samsung sources
and google sources to get that system.
after compile the is one folder out that has system.img but i can't flash this .img file the mobile phone gets like a stone :S
All Black!

Please describe the process you are using to flash the system.img.
Have you though about just copying over the modified files?
Also, if you could create a step by step list of your process, maybe we can figure out what's going wrong.

i've compiled the google+samsung sources and this created the system.img.
Then i used Heimdall to choose only system to flash and It didn't work.
i've tryed also to change only the nfc.apk file put it in the app folder tryed to flash the ROM (in this case from Cyanogenmod) and it didn't work.
Thanks.

pec0 said:
i've compiled the google+samsung sources and this created the system.img.
Then i used Heimdall to choose only system to flash and It didn't work.
i've tryed also to change only the nfc.apk file put it in the app folder tryed to flash the ROM (in this case from Cyanogenmod) and it didn't work.
Thanks.
Click to expand...
Click to collapse
have you tried to remove and install your nfc.apk using adb rather than trying to flash the entire rom? I would think all you need to do is mod the kernel, flash the kernel, then copy over any modules and replace the nfc.apk.

[Q] [GT-P3100][Kernel] Compiled kernel does not boot!

Hi,
I'm trying to boot my galaxy tab2 7 with compiled kernel.
First, I downloaded kernel source from http://opensource.samsung.com.
I download GT-P3100_JB_Opensource_Update2.zip file and extract it.
To compile, I followed ketut.kumajaya's thread (http://forum.xda-developers.com/show....php?t=2086996)
I build only kernel, not other modules. Compile was done without problem.
And I extract boot.img from Stock ROM file downloaded from samsung-updates.com (http://samsung-updates.com/device/?id=GT-P3100).
Stock ROM version is P3100XXCLJ3 (that's my device's baseband version).
I unpacked boot.img and I got boot.img-kernel.gz and boot.img-ramdisk.cpio.gz.
(To make sure unpack/repack tool is working properly, I simply unpack stock boot.img and repack it. And the new boot.img was working properly. So I assume my unpack/repack tool have no problem).
So, I replace boot.img-kernel.gz with zImage and repack it.
But this time new boot image does not working (Device stuck in boot logo)
What did I done wrong? Any body help! I've been stuck with this for a week now...
(When stock ROM is flashed, Kernel version in device info is "3.0.31-595683"

You must compile pvrsrvkm kernel module as I mentioned in http://forum.xda-developers.com/showthread.php?t=1859227 and then you can use KK-Boot 0.5.x core as your flashable zip template (have PowerVR 3D driver binary inside). If you decide to keep the stock PowerVR binary, change:
#define PVRVERSION_BUILD 2166536
Click to expand...
Click to collapse
to
#define PVRVERSION_BUILD 2120756
Click to expand...
Click to collapse
and
#define PVRVERSION_BUILD_HI 216
#define PVRVERSION_BUILD_LO 6536
Click to expand...
Click to collapse
to
#define PVRVERSION_BUILD_HI 212
#define PVRVERSION_BUILD_LO 0756
Click to expand...
Click to collapse
in pvrversion.h
Do not forget to copy pvrsrvkm_sgx540_120.ko to /system/lib/modules (backup the stock modules first!)
For trouble free development, I recommend you to use GT-P3110_JB_Opensource.zip, apply all my kernel patch and use my android_espresso_omap4430_r04_blackhawk_defconfig as your kernel config file. Good luck!

necesriverua
ketut.kumajaya said:
You must compile pvrsrvkm kernel module as I mentioned in http://forum.xda-developers.com/showthread.php?t=1859227 and then you can use KK-Boot 0.5.x core as your flashable zip template (have PowerVR 3D driver binary inside). If you decide to keep the stock PowerVR binary, change:
to
and
to
in pvrversion.h
Do not forget to copy pvrsrvkm_sgx540_120.ko to /system/lib/modules (backup the stock modules first!)
For trouble free development, I recommend you to use GT-P3110_JB_Opensource.zip, apply all my kernel patch and use my android_espresso_omap4430_r04_blackhawk_defconfig as your kernel config file. Good luck!
Click to expand...
Click to collapse
Many thanx.
I really appreiciate it.
I will try this right away.

ketut.kumajaya said:
You must compile pvrsrvkm kernel module as I mentioned in http://forum.xda-developers.com/showthread.php?t=1859227 and then you can use KK-Boot 0.5.x core as your flashable zip template (have PowerVR 3D driver binary inside). If you decide to keep the stock PowerVR binary, change:
to
and
to
in pvrversion.h
Do not forget to copy pvrsrvkm_sgx540_120.ko to /system/lib/modules (backup the stock modules first!)
For trouble free development, I recommend you to use GT-P3110_JB_Opensource.zip, apply all my kernel patch and use my android_espresso_omap4430_r04_blackhawk_defconfig as your kernel config file. Good luck!
Click to expand...
Click to collapse
Dear ketut,
Because I'm behind firewall, I cannot download pvrsrvkm kernel source.
Frankly, I have very little knowledge about android system. so I'm not sure I understand your guide correctly..
What I've done is as follows:
1. Download GT-P3110_JB_Opensource
2. Apply your patch from http://forum.xda-developers.com/showthread.php?t=1859227
3. Modify PVRVERSION_BUILD and PVRVERSION_BUILD_HI and PVRVERSION_BUILD_LOW in drivers/gpu/pvr/pvrversion.h (kernel source)
4. Apply android_espresso_omap4430_r04_blackhawk_defconfig and Build (using arm-2010q1-202..)
5. Repack zImage with ramdisk.cpio.gz (extracted from stock rom file)
6. Replace boot.img in your kkboot-0.5.2-core-p31xx.zip with repacked boot.img
7. Apply new kkboot.zip in CWM and installation failed and aborted.
Am I totally in wrong direction? What am I missing here?
I sincerely ask your help.
(I found that when build kernel after your patch, additional module files (.ko) are generated.
Should I do something with that?)

cks1119 said:
Dear ketut,
Because I'm behind firewall, I cannot download pvrsrvkm kernel source.
Frankly, I have very little knowledge about android system. so I'm not sure I understand your guide correctly..
What I've done is as follows:
1. Download GT-P3110_JB_Opensource
Click to expand...
Click to collapse
Correct.
2. Apply your patch from http://forum.xda-developers.com/showthread.php?t=1859227
Click to expand...
Click to collapse
Correct, all my patch from 01-07.
3. Modify PVRVERSION_BUILD and PVRVERSION_BUILD_HI and PVRVERSION_BUILD_LOW in drivers/gpu/pvr/pvrversion.h (kernel source)
Click to expand...
Click to collapse
Incorrect, nothing to do with pvr driver inside the kernel source, it's useless. You can download eurasia_km.tgz from http://www.mediafire.com/?m9te7t4rosp131d . Do not modify PVRVERSION if you plan to use my kkboot boot image.
4. Apply android_espresso_omap4430_r04_blackhawk_defconfig and Build (using arm-2010q1-202..)
Click to expand...
Click to collapse
Code:
export CROSS_COMPILE='/opt/toolchains/arm-2010q1/bin/arm-none-linux-gnueabi-'
export LDFLAGS=''
export CFLAGS=''
export SUBARCH=arm
export ARCH=arm
make mrproper
make android_espresso_omap4430_r04_blackhawk_defconfig
make -j4
5. Repack zImage with ramdisk.cpio.gz (extracted from stock rom file)
Click to expand...
Click to collapse
Incorrect, use kkboot ramdisk for now.
6. Replace boot.img in your kkboot-0.5.2-core-p31xx.zip with repacked boot.img
Click to expand...
Click to collapse
Correct.
7. Apply new kkboot.zip in CWM and installation failed and aborted.
Click to expand...
Click to collapse
Try to unpack and repack kkboot without modification, is it works?
Am I totally in wrong direction? What am I missing here?
I sincerely ask your help.
(I found that when build kernel after your patch, additional module files (.ko) are generated.
Should I do something with that?)
Click to expand...
Click to collapse
Unpack kkboot, you will see a lot of modules inside system/lib/modules

Try to unpack and repack kkboot without modification, is it works?
Click to expand...
Click to collapse
No, unpack tool that I have is not working.
I found the tool that you've uploaded, but the unzip password was not correct for some reason

I downloaded your tool in http://forum.xda-developers.com/showthread.php?t=1241005
But while unpacking, it says below:
Code:
BOARD_KERNEL_CMDLINE console=ttyO2,115200n8 mem=1024M androidboot.console=ttyO2 vram=20M omapfb.vram=0:16M
BOARD_KERNEL_BASE 80000000
BOARD_PAGE_SIZE 00000800
gzip: ../kkboot.img-ramdisk.gz: not in gzip format
cpio: premature end of archive
Is it require special tools to unpack kkboot image?

Forgot to mention, my ramdisk packed in lzo format You need lzop application to unpack it.

ketut.kumajaya said:
Forgot to mention, my ramdisk packed in lzo format You need lzop application to unpack it.
Click to expand...
Click to collapse
You mean only ramdisk?
If so, as my understanding, unpacking boot.img in kkboot-0.5.2 and repack without any change, should be working
whether your ramdisk is packed with lzo or not.
But when I did it, I still got installation fail.
(I used the unpackbootimg in blackhawk tool from http://forum.xda-developers.com/showthread.php?t=1241005)
By the way,
I've searching about lzop compressed ramdisk and found this: https://github.com/trevd/aos-tools/blob/master/scripts/unpack-ramdisk.sh
And with this method, I could unpack ramdisk file.
Code:
cat boot.img-ramdisk.gz | lzop -d | cpio -i
But, I think this is not the point.

ketut.kumajaya said:
Forgot to mention, my ramdisk packed in lzo format You need lzop application to unpack it.
Click to expand...
Click to collapse
I simply unpack and repack boot.img from kkboot-0.5.2-core-p31xx.zip
with boot.img-tools in http://forum.xda-developers.com/showthread.php?t=1241005
Then change original boot.img with repacked one and make new zip file in external SD card.
When I go to CWM recovery and try to install new zip file, then I got following message:
Code:
-Extracting files
set_perm : some changes failed
E:Error in /external_sd/newfile.zip
(Status 7)
Installation aborted
I've been trying other tools that I could find but still does not working :crying:

ketut.kumajaya said:
Forgot to mention, my ramdisk packed in lzo format You need lzop application to unpack it.
Click to expand...
Click to collapse
Finally done it!
I've got tab 2 running my own kernel!
Again, thank you for your help and all works you've done!:good:

cks1119 said:
Finally done it!
I've got tab 2 running my own kernel!
Again, thank you for your help and all works you've done!:good:
Click to expand...
Click to collapse
Congrat :good:

Development boot.img for SM-A127F and SM-A125F with the touch and MTP fixed

Here is a few boot.img files (tarred for Odin and zipped) intended to be used together with GSI systems (e.g. LineageOS) which suffer from the non-functional touchscreen after the wake-up and the non-functional MTP (USB file transfer). The boot.img files contain the recompiled stock kernel taken from Samsung Open Source with only a couple of the most necessary fixes. 99.9% unaltered, 100% open-source
All credits for the touchscreen fix go to manteiga25, he's done an amazing job on figuring this all out, still from his solution which includes additional performance tweaks I've taken the absolute bare minimum so that the problem is no longer present. Also huge thanks to Osvaldo Costa for the wonderful bootimgtool.
NOTE: If you did not yet flash any non-stock boot.img or recovery.img you may get the bootloop after flashing of any of these files (except for the orig's). That bootloop is caused by bootloader refusing to boot the VB-unsigned kernel together with the rest of the VB-signed components. The only solution (unfortunately) is the full factory reset, so you'll have to lose your user data; everything else, including the GSI will remain intact, but you'll have to set it up from scratch.
UPDATE 01/09/23: added the version based on A127FXXU7CVL2 (Android 13) version of the kernel.
UPDATE 01/11/23: added the fixed kernels for SM-A125F.
UPDATE 03/16/23: added the version based on A127FXXU5BVF3 (Android 12) version of the kernel.
Files for SM-A127F:
boot_sm-a127f-u4_fixed.zip: A127FXXU4AUK1-based kernel, Ilitek ili9881x fix, MTP fix
boot_sm-a127f-u5_fixed.zip: A127FXXU5BVF3-based (Android 12) kernel, Ilitek ili9881x fix, MTP fix
boot_sm-a127f-u7_fixed.zip: A127FXXU7CVL2-based (Android 13) kernel, Ilitek ili9881x fix, MTP fix
orig_boot_sm-a127-u4.zip: the original unaltered A127FXXU4AUK1 boot.img for undo
orig_boot_sm-a127-u5.zip: the original unaltered A127FXXU5BVF3 boot.img for undo
orig_boot_sm-a127-u7.zip: the original unaltered A127FXXU7CVL2 boot.img for undo
src_sm-a127f_fix.zip: all the altered source files
Files for SM-A125F:
boot_sm-a125f-u2_fixed_v1.zip: A125FXXU2BVB4-based kernel, Ilitek ili9881x fix, MTP fix
boot_sm-a125f-u2_fixed_v2.zip: A125FXXU2BVB4-based kernel, Ilitek ili9881x fix, Novatek nt36525 fix, MTP fix
orig_boot_sm-a125-u2.zip: the original unaltered A125FXXU2BVB3 boot.img for undo
src_sm-a127f-fix_v2.zip: all the altered source files
v1 should be easy on battery, but v2 will probably eat more because it basically disables the power saving features of the touchscreen chip (unfortunately that's the only solution at the kernel side).
If you don't trust me or if you're in desperate need of a more recent kernel, here are the steps how to rebuild it all yourself (for SM-A127F on Debian 11):
Download the kernel source from Samsung Open Source (A127FXXU3AUJ5)
Unpack SM-A127F_RR_Opensource.zip and Kernel.tar.gz inside
Unpack SM-A127F_RR_Opensource_A127FXXU4AUK1.zip into the same dir (overwriting the files)
Unpack the attached source.tar.gz, it contains only the changed files and build.sh facilitating compilation
From root: apt install clang-9 gcc-9-aarch64-linux-gnu
Remove any other versions of clang. Then cd /usr/bin; ln -s clang clang-9; ln -s clang++ clang++-9; ln -s clang-cpp clang-cpp-9
Back in the Kernel dir, run build.sh and wait for the kernel to compile
Download bootimgtool and compile it (just "make")
Download the stock firmware
Extract boot.img from AP_A127FXX[...].tar.md5 (unpack using tar, ignore the .md5) to the root dir of your Kernel
bootimgtool disassemble boot.img
cp Kernel/arch/arm64/boot/Image kernel
bootimgtool create -o boot.img
Flash boot.img as is using Heimdall or pack into .tar and flash using Odin
For SM-A125F you'll need to use the Google's patched Clang and GCC instead, and there is no way around that except for lots and lots of additional include paths for the Mediatek drivers (and even that does not guarentee that it will be compiled successfully).

uluruman said:
Here is the boot.img (tarred for Odin) intended to be used together with GSI systems (e.g. LineageOS). It contains the recompiled stock U4 kernel taken from Samsung Open Source with only a couple of the most necessary fixes, namely the freezing touchscreen and the non-functional MTP. 99.9% unaltered, 100% open-source.
All credits for the touchscreen fix go to manteiga25, he's done an amazing job on figuring this all out, still from his solution which includes additional performance tweaks I've taken the absolute bare minimum so that the problem is no longer present. Also huge thanks to Osvaldo Costa for the wonderful bootimgtool.
If you don't trust me here are the steps how to rebuild it all yourself (on Debian 11):
Download the kernel source from Samsung Open Source (A127FXXU3AUJ5)
Unpack SM-A127F_RR_Opensource.zip and Kernel.tar.gz inside
Unpack SM-A127F_RR_Opensource_A127FXXU4AUK1.zip into the same dir (overwriting the files)
Unpack the attached source.tar.gz, it contains only the changed files and build.sh facilitating compilation
From root: apt install clang-9 gcc-9-aarch64-linux-gnu
Remove any other versions of clang. Then cd /usr/bin; ln -s clang clang-9; ln -s clang++ clang++-9; ln -s clang-cpp clang-cpp-9
Back in the Kernel dir, run build.sh and wait for the kernel to compile
Download bootimgtool and compile it (just "make")
Download the stock firmware
Extract boot.img from AP_A127FXX[...].tar.md5 (unpack using tar, ignore the .md5) to the root dir of your Kernel
bootimgtool disassemble boot.img
cp Kernel/arch/arm64/boot/Image kernel
bootimgtool create -o boot.img
Flash boot.img as is using Heimdall or pack into .tar and flash using Odin
Click to expand...
Click to collapse
Amazing work. Love to see developers still working on this device. Does it work with SM-A125F?

Allehandro said:
Amazing work. Love to see developers still working on this device. Does it work with SM-A125F?
Click to expand...
Click to collapse
You can try, it may work, but most likely will bootloop. SM-A125F is based on a Mediatek SoC, SM-A127F is based on Exynos, which has a different kernel config.

uluruman said:
You can try, it may work, but most likely will bootloop. SM-A125F is based on a Mediatek SoC, SM-A127F is based on Exynos, which has a different kernel config.
Click to expand...
Click to collapse
I don't want to risk it as it is my main device and don't want to have to restore the device later on. Thanks though.

I've finally managed to compile the SM-A125F kernel (A125FXXU2BVB4 - SM-A125F_EUR_RR): somehow it turned out to be MUCH harder than that for SM-A127F, as nearly everything there is designed for only one specific toolchain, plus the non-Samsung s_mtp driver did not compile, so I had to take it from A127F's source. Anyway, I've ported the same fixes and here is the experimental boot.img. As I don't have SM-A125F I cannot test it, so I need someone to test it. Also attached is the original U2 boot.img: in case it does not work you just flash the original.

Amazing bro! Mad respect!!!!
I will soon put this baby to the test and see what's made of!!!
I can flash this using ODIN (PDA) directly over the current LOS GSI right?
Also, do you plan to include this kernel in your gsi building script so that the boot img of the gsi will be this one?
One other issue that I seemed to also have in my phone was the proximity sensor was not working e.g. when I was in call the screen would remain on....

axy_david said:
Amazing bro! Mad respect!!!!
I will soon put this baby to the test and see what's made of!!!
I can flash this using ODIN (PDA) directly over the current LOS GSI right?
Also, do you plan to include this kernel in your gsi building script so that the boot img of the gsi will be this one?
One other issue that I seemed to also have in my phone was the proximity sensor was not working e.g. when I was in call the screen would remain on....
Click to expand...
Click to collapse
Yes, flash using Odin. GSI should not be affected in any way. If anything does wrong I've also attached the original A127FXXU4AUK1 boot.img, so that you could revert the changes.
Currently I'm struggling to make the same fixed boot.img for my second phone, which is SM-A325F, and I cannot: even if I just unpack and repack back the same boot.img using any tool, including the Google's official mkbootimg, it causes the bootloop. So all of this is currently experimental.

uluruman said:
Currently I'm struggling to make the same fixed boot.img for my second phone, which is SM-A325F, and I cannot: even if I just unpack and repack back the same boot.img using any tool, including the Google's official mkbootimg, it causes the bootloop. So all of this is currently experimental.
Click to expand...
Click to collapse
This issue is sorted out: one cannot flash a custom boot.img over the signed stock one and don't do the full factory reset afterwards. Only after the factory reset the system boots with the unsigned boot partition. Interestingly enough, Download allows flashing such an image without any warnings (in contrast to flashing up_param.bin) but the system just refuses to boot.

uluruman said:
This issue is sorted out: one cannot flash a custom boot.img over the signed stock one and don't do the full factory reset afterwards. Only after the factory reset the system boots with the unsigned boot partition. Interestingly enough, Download allows flashing such an image without any warnings (in contrast to flashing up_param.bin) but the system just refuses to boot.
Click to expand...
Click to collapse
is it possible to fix the proximity sensor?

axy_david said:
is it possible to fix the proximity sensor?
Click to expand...
Click to collapse
There is no physical proximity sensor in this phone, but with the latest firmware you can normally use the Phone app. Now it normally reacts on touching the top part of the screen with your ear and blanks the screen. The screen does not blank on approaching the screen but only on touching it.

uluruman said:
Here is the boot.img (tarred for Odin) intended to be used together with GSI systems (e.g. LineageOS). It contains the recompiled stock U4 kernel taken from Samsung Open Source with only a couple of the most necessary fixes, namely the freezing touchscreen and the non-functional MTP. 99.9% unaltered, 100% open-source.
If the fixed boot.img does not work for you for some reason, I've also attached the original U4 boot (taken from the SM-A127F_NPB_A127FXXU4AUK1 firmware) so you could revert the changes.
All credits for the touchscreen fix go to manteiga25, he's done an amazing job on figuring this all out, still from his solution which includes additional performance tweaks I've taken the absolute bare minimum so that the problem is no longer present. Also huge thanks to Osvaldo Costa for the wonderful bootimgtool.
If you don't trust me or if you're in desperate need of a more recent kernel, here are the steps how to rebuild it all yourself (on Debian 11):
Download the kernel source from Samsung Open Source (A127FXXU3AUJ5)
Unpack SM-A127F_RR_Opensource.zip and Kernel.tar.gz inside
Unpack SM-A127F_RR_Opensource_A127FXXU4AUK1.zip into the same dir (overwriting the files)
Unpack the attached source.tar.gz, it contains only the changed files and build.sh facilitating compilation
From root: apt install clang-9 gcc-9-aarch64-linux-gnu
Remove any other versions of clang. Then cd /usr/bin; ln -s clang clang-9; ln -s clang++ clang++-9; ln -s clang-cpp clang-cpp-9
Back in the Kernel dir, run build.sh and wait for the kernel to compile
Download bootimgtool and compile it (just "make")
Download the stock firmware
Extract boot.img from AP_A127FXX[...].tar.md5 (unpack using tar, ignore the .md5) to the root dir of your Kernel
bootimgtool disassemble boot.img
cp Kernel/arch/arm64/boot/Image kernel
bootimgtool create -o boot.img
Flash boot.img as is using Heimdall or pack into .tar and flash using Odin
P.S.: the U5 kernel sources are suspicously segregated between RR (rest of the world), EUR, CIS and CIS-SER (Russia). It's quite interesting what are the differences?
Click to expand...
Click to collapse
Can you make one for A127F/DSN U7? (I don't have linux)

just tested on my phone latest U7 or s7???? nevertheless it bootloops

axy_david said:
just tested on my phone latest U7 or s7???? nevertheless it bootloops
Click to expand...
Click to collapse
it only works for u4 currently.

TheWorldYT said:
Can you make one for A127F/DSN U7? (I don't have linux)
Click to expand...
Click to collapse
I will, hold on.

just tested on my phone latest U7 or s7???? nevertheless it bootloops
TheWorldYT said:
it only works for u4 currently.
Click to expand...
Click to collapse
damn, and I can't downgrade, im using A127FXXS7BVK1 the latest update for europe really

axy_david said:
just tested on my phone latest U7 or s7???? nevertheless it bootloops
damn, and I can't downgrade, im using A127FXXS7BVK1
Click to expand...
Click to collapse
same thing.
also:
uluruman said:
I will, hold on.
Click to expand...
Click to collapse
axy_david said:
just tested on my phone latest U7 or s7???? nevertheless it bootloops
damn, and I can't downgrade, im using A127FXXS7BVK1 the latest update for europe really
Click to expand...
Click to collapse
uluruman said he will create one.

axy_david said:
just tested on my phone latest U7 or s7???? nevertheless it bootloops
damn, and I can't downgrade, im using A127FXXS7BVK1 the latest update for europe really
Click to expand...
Click to collapse
Done! ) See the update in the first post.
I've used the A127FXXU7CVL2 version source but it should work anyway because it's also U7-based (anyway there is no alternative - Samsung provides only that U7-based kernel). The only thing that theoretically can be needed is the factory reset: at least with my SM-A325F that was the case of the weird boot loop - the Verified Boot protection being voided (the warranty void bit being set) caused the bootloader to refuse loading the kernel.

uluruman said:
Done! ) See the update in the first post.
I've used the A127FXXU7CVL2 version source but it should work anyway because it's also U7-based (anyway there is no alternative - Samsung provides only that U7-based kernel). The only thing that theoretically can be needed is the factory reset: at least with my SM-A325F that was the case of the weird boot loop - the Verified Boot protection being voided (the warranty void bit being set) caused the bootloader to refuse loading the kernel.
Click to expand...
Click to collapse
Thank you!

uluruman said:
I've finally managed to compile the SM-A125F kernel (A125FXXU2BVB4 - SM-A125F_EUR_RR): somehow it turned out to be MUCH harder than that for SM-A127F, as nearly everything there is designed for only one specific toolchain, plus the non-Samsung s_mtp driver did not compile, so I had to take it from A127F's source. Anyway, I've ported the same fixes and here is the experimental boot.img. As I don't have SM-A125F I cannot test it, so I need someone to test it. Also attached is the original U2 boot.img: in case it does not work you just flash the original.
Click to expand...
Click to collapse
Can u make flashable zip for fix touch and mtp for a125f cause i think it dndt work after flashing only boot.img in twrp,still i found out that the baseband version is still bv5 instead of bv4 i hope you fix that bro because i want to install gsi

uluruman said:
Here is the boot.img (tarred for Odin) intended to be used together with GSI systems (e.g. LineageOS). It contains the recompiled stock U4 kernel taken from Samsung Open Source with only a couple of the most necessary fixes, namely the freezing touchscreen and the non-functional MTP. 99.9% unaltered, 100% open-source.
If the fixed boot.img does not work for you for some reason, I've also attached the original U4 boot (taken from the SM-A127F_NPB_A127FXXU4AUK1 firmware) so you could revert the changes.
All credits for the touchscreen fix go to manteiga25, he's done an amazing job on figuring this all out, still from his solution which includes additional performance tweaks I've taken the absolute bare minimum so that the problem is no longer present. Also huge thanks to Osvaldo Costa for the wonderful bootimgtool.
UPDATE 01/09/23: added the version based on A127FXXU7CVL2 (Android 13) version of the kernel.
If you don't trust me or if you're in desperate need of a more recent kernel, here are the steps how to rebuild it all yourself (on Debian 11):
Download the kernel source from Samsung Open Source (A127FXXU3AUJ5)
Unpack SM-A127F_RR_Opensource.zip and Kernel.tar.gz inside
Unpack SM-A127F_RR_Opensource_A127FXXU4AUK1.zip into the same dir (overwriting the files)
Unpack the attached source.tar.gz, it contains only the changed files and build.sh facilitating compilation
From root: apt install clang-9 gcc-9-aarch64-linux-gnu
Remove any other versions of clang. Then cd /usr/bin; ln -s clang clang-9; ln -s clang++ clang++-9; ln -s clang-cpp clang-cpp-9
Back in the Kernel dir, run build.sh and wait for the kernel to compile
Download bootimgtool and compile it (just "make")
Download the stock firmware
Extract boot.img from AP_A127FXX[...].tar.md5 (unpack using tar, ignore the .md5) to the root dir of your Kernel
bootimgtool disassemble boot.img
cp Kernel/arch/arm64/boot/Image kernel
bootimgtool create -o boot.img
Flash boot.img as is using Heimdall or pack into .tar and flash using Odin
P.S.: the U5 kernel sources are suspicously segregated between RR (rest of the world), EUR, CIS and CIS-SER (Russia). It's quite interesting what are the differences?
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Please create working flashable zip file for twrp for a125f cause i dont have pc i cant use odin,thank you