Questions tagged [kernel]

The kernel is a central component of most computer operating systems. It acts as bridge between applications and the hardware and also manages the systems's resources.

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Hijacked Android phone (not detected by Windows and cannot reset it)

I tried to debug my Android phone using mvt-android on Kali Linux, and guess what happened, my Samsung phone started flickering (pink screen) all of a sudden. I had to restart it. I then re-plugged it ...
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Create boot.img from compiled kernel

I am trying to install Magisk on a RePhone. The only operating system related download I found (on the company's website or anywhere else) is this: https://myrephone.com/opensource.7z That seems to be ...
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Does Heimdall have the option to boot without flashing/substituting the kernel? (like fastboot boot boot.img)

Fastboot has the option fastboot boot Image.gz to boot a kernel without flashing it to the phone. Is there something similar for Heimdall? I did not want to mess with my phone's kernel for now. It's a ...
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Which phones today uses Android Common Kernel? [closed]

Android Common Kernel is an effor by google to unificate the kernels of the phones. What are examples of phones today that uses Android Common Kernels, except Pixel?
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unable to boot new kernel with kexec on android

As an alternative to pstore (pstore/ramoops won't work on Poco M3, rooted), I'm trying to boot another kernel into my already booted android kernel, to maybe see the kernel logs on boot, using ...
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pstore/ramoops won't work on Poco M3, rooted

I'm trying to use pstore logs on my Poco M3. I tried everything. PSTORE configs are activated on the kernel, pstore module is loaded on the phone, phone is rooted, /sys/fs/pstore is mounted ...
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HELP! How to properly modify anykernel.sh?

I managed to flash self-modified kernel which apparently is installed. Inquiry: How can I install this kernel correctly and completely? I suspect that anykernel.sh is the issue here, because I don't ...
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Android ftrace microphone

Is there a way to discover if an application uses microphone using ftrace in Android kernel? I monitor all binder transactions but I did’t find a method that discovers in unique way that an app uses ...
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Why is a vendor blob needed to build an Android ROM?

Why do we need a vendor blob in order to make our custom Android ROM from the AOSP project? As far as I know, the vendor blob contains the required proprietary drivers. But these drivers we could have ...
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How to enable both "diag" and "rndis" port of Android?

I have One Plus Nord device which is rooted using Magisk. I am able to enable the usb tethering(rndis) and capturing modem logs(diag) separately using the libusb program. But the requirement is to ...
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Installing v4l2loopback and other modules on android?

I'm trying to install v4l2loopback, ffmpeg and v4l-utils onto my android device. I believe I have figured out how to install v4l2loopback (by pushing it as a signed kernel module), but I'm stuck ...
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Fastboot Kernel Install

I want to install Arrow OS with OrangeFox. I understood the installation step, but I want to install the KVM opened kernel. I have it in the form of boot.img file and I install it with the fastboot ...
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Change network interface name in persistent way on Android [duplicate]

Is it possible to change the name of a network interface in an Android 11 rooted system making the change persistent? I am not looking for just renaming the interface after the boot, I want to change ...
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Can't run `fastboot boot kernel` on Poco M3

I'm trying to boot a kernel without flashing it, on my Poco M3. I already unlocked the booloader and I'm on fastboot mode. Some fastboot commands like reboot work, but for fastboot boot, I did ...
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Is it possible to build a linux kernel/stripped down android version for Samsung Galaxy A5 and Tab 4? [duplicate]

I have been doing a lot of hobbyist electronics recently and was wondering if I can use my old Samsung Galaxy A5 duos phone, samsung galaxy core duos gt-i8262 and/or Samsung Galaxy Tab 4 7.0 3G in ...
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How to load android shared libraries

How does Android load /system/lib/*.so libraries? How does the system knows what file is for what purpose. Is there a database or list of expected.so files and their functions?
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Android x86 Driver Issues + Kernel Update

I have a Intel tablet (Reeder A12ix, hampoo) and i installed Android-x86 x64 using USB drive. I have this problems: Touchscreen not work Not autorotating Power button not work Animations very slow, ...
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How do I get the kernel for this phone?

I think companies are legally required to publish the kernel for their phone somewhere. I bought a phone derived from this one: https://www.paxtechnology.com/android-smart-pos and can't find the ...
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flash boot.img to use the kernel

why to flash a kernel i need a zipper anykernel 3? i can't flash directly the boot.img of a rom, example (PixelExperience) to have oniichan kernel on (LineageOS)? i'm absolutely new in the world of ...
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Does each ROM has its own boot?

At the moment, I have Redmi Note 7 on Pixel Experience. I do not like the kernel it has. As a result, I tried to change it by flashing the boot.img of the stock ROM. Unfortunately, it remains stuck at ...
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Is there a way to stop Android messages from network providers?

I receive ads from my network provider via Android pop-ups: Is there a way to disable it? These messages are extremely annoying, I woke up last night due to the brightness of the screen, as these ...
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Is it possible to run KVM-Accelerated VM on Android Devices?

I am trying to enable KVM on the Android kernel so that I can run KVM accelerated VM on my Android phone. However, after enabling KVM, checking the dmesg, I get this: [ 1.039716] c3 1 kvm [1]:...
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Booting pixel4a from source stuck on google boot screen

Building Pixel 4a kernel Asked this same question and then closed the topic without actually answering it. When building and flashing pixel3a, following instructions on https://source.android.com/...
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2 votes
1 answer
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Native Linux on Android's SOCs

I wanted to know for quite some time why linux operating systems are not ported to phones or tablets SOCs with android? Like how they are on desktops and laptops. I know linux can run on various ...
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Building Pixel 4a kernel [closed]

I'm trying to build my custom sunfish kernel on pixel 4a, note that the system is unlocked and rooted via "Magisk", After building success (for test I didn't change anything on kernel source)...
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1 answer
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Modifications of vendor image on Android 10 - alternative idea

Further to my earlier question here and according to the "Mounting Partitions Early" article, I'm looking the correct way to implement my new idea: Skipping the mounting in the startup of ...
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1 vote
1 answer
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Modifications of vendor image on Android 10

There is a vendor image in my device I want to change (unpack/mount, doing changes, pack/umount). My purpose is to update boot.img with my new kernel (in rooted device). Unfortinatly it does not ...
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1 vote
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How to get information parameters from kernel after boot loads android?

when an (Android) bootloader starts loading kernel, it passes some parameters to the kernel (for example androidboot.verifiedbootstate, ...),how to get the information whether boot gets successful or ...
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1 vote
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How to automatically set a CPU governor on boot?

There are apps that can accomplish this task (e.g. "Kernel Adiutor" and others), however they in turn require other apps that can grant them root access to begin with, which is a lot of ...
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1 vote
1 answer
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AOSP Android 11 Kernel build for Pixel3a/Sargo Touchscreen not working

Intro: I had an issue getting the build to compile, but finally got it to successfully build/compile, & installed on my phone, as covered here: mkbootfs command not found while trying to build ...
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mkbootfs command not found while trying to build aosp kernel

Followed guide here: https://source.android.com/setup/build/building-kernels mkdir android-kernel && cd android-kernel repo init -u https://android.googlesource.com/kernel/manifest -b android-...
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What can I do with an open source phone/kernel?

So this is my very first attempt in any kind of android development. I have here my phone's official kernel source. I was wondering if I can build this to boot or if it's ready for building. Also this ...
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3 votes
1 answer
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Salvage Android Phone as Linux-Server (radio/wifi hardware broken)

My device has hardware problems with radio/wifi. Hence it's not possible to use sim-card or wifi. That also makes it restart frequently. Now it's useless as a phone. So I am trying to turn it in a ...
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Is it safe to turn off kernel panic in Android?

So I'm using a custom kernel that overclocked my CPU and GPU. I turned down the frequency to stock but the big cpu freq can't be set(restore itself to default after some time), causing my phone to ...
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Add more clock speeds

I know that the phone's kernel contains the clock speeds but is there a way to add your own clock speeds? What do I have to do to edit the kernel, where is the the clock speed data stored?
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How to process live sound output

I'm new to android and new to anything related to soundprocessing. The thing is, I have a simple deep learning model to eliminate noise (barking dogs, cars, ...). I want to apply (use) it to the sound ...
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2 votes
0 answers
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Does turning off cpu cores will actually save power?

My phone is using custom kernel that has cpu hotplug in it. The hotplug name is AutoSMP and it has max cpu (big & little) core that should be online option in it. Currently I'm using 3 + 3 core ...
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Why does android has only one zram but linux distros use many zram equal to the number of cpu cores?

Most android roms have only one zram device [zram0] but linux distros use many zram like zram0, zram1 .... Why is it like that? Does using many zram consumes more power or adds complexity? what's the ...
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1 vote
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How to debug the kernel if the device only boot to fastboot [closed]

I am tring to compile the kernel source provided by the manufacture of my phone(OPPO PCCM00 precisely). Since it's not "well-opensourced", I changed quite a lot to make sure the kernel would ...
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1 vote
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What algorithm does Android used to translate touchscreen events to scancodes?

I have been debating someone recently about whether physical keyboards are faster than touchscreen keyboards. I have a lot of CS knowledge, but not a lot of Android knowledge. Therefore, during this ...
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1 vote
1 answer
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syslog shows a bunch of FF messages

When I run dmesg I see a bunch of these errors, FF SUSPEND INT 0 ?\x09 FF WAKEUP 0 ?\x09 FF GAD SUS 0 ?\x09 What do these mean? Is this ...
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What is the most stable kernel for my ALE-L21 (2015) alice and ROM?

I'm pretty sure that this is already a weak legacy device but I want it to be useful and stable in performance to the max. Can you suggest the ultimate kernel for my 7.1.2 AOSP based custom ROM? Note:...
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How can I tweak my kernel to use all CPUs in my rooted device?

I have Huawei ALE-L21 alice (2015) Magisk-rooted Bootloader-Unlocked Xposed-Installed but it's somehow slower and I decided to tweak my CPU but here is what ES Kernel Manager shows: Also, I can't ...
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android's linux kernel scheduling mechanism vs harmony os's deterministic latency engine

I was reading upon Harmony OS and found that android's Linux kernel scheduling mechanism has some limitations as mentioned here: https://harmonyosofficial.com/ From Harmony OS website mentioned above: ...
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2 votes
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264 views

Android Boot Logs Before Logo

BTW, I am wanting to know what Android Boot Logs come before the Android Boot Logo. I see an Android Boot Logo, and I have to hold the power button, but what does it show in the boot logs in the ...
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2 votes
1 answer
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Default kernel version of Android-x86 ISO

I know that android-x86[...]-k49.iso means it is using kernel version 4.9, but for some ISO like android-x86[...]-r4.iso, the kernel version is not mentioned. Since 64-bit isn't booting for me, it ...
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Linux Deploy Ubuntu share folder

I wasn't sure if I had to ask this question on a Linux Exchange or on the Android one, but since folder sharing is working fine on the Linux that are running on my computer, I thought that it is an ...
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3 votes
1 answer
156 views

Galaxy S7EDGE Random Reboots

Two months back from now I installed LightROM oreo, it was fine then but after two months it started to get slow. So I decided to flash pie or Q rom, but from my previous experience whenever I install ...
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4 votes
1 answer
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How to make Ethernet work on Android over OTG?

I am trying to use an LTE modem connected to an Android 7 device over an OTG cable. The kernel recognizes the device and registers it with cdc_ether, but I am unable to use the connection from the ...
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Nexus 7 (2012 Wifi) Custom kernel bootloop [closed]

I trying to build custom kernel for my Nexus 7 (2012 Wifi) device. Changed few things builded successfull, no bootloop. But I enable this in menuconfig: Device Drivers -> Network device support -> ...
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