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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How to make selinux on Android kernel, permanently permissive?

I am new to kernels and lately i compiled one for galaxy s5 with the marshmallow opensource. Now i can change my selinux policy to permissive from terminal emulator but i want to make that permanent ...
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1answer
1k views

How to debug “wlan_wake kernel wakelock” on an unrooted device?

The question is as short as the title. I've a Samsung Galaxy Note 3 & it has started showing issues where the CPU remains in lowest possible frequency (250Mhz) and it doesn't go to deep sleep. I ...
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0answers
21 views

Custom ROM on a stock S5 with custom kernel?

A couple months back, I have installed a custom kernel on my Samsung S5 with stock Touchwiz. Now I want to flash a custom ROM on this phone and was wondering if I can do it while my kernel is not the ...
2
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0answers
31 views

Is it possible to have the system/kernel reverse x-axis touch input?

I have a galaxy S6 G920F. I have this problem with my touchscreen. The x-axis input is reversed. When I touch it on the left part it registers the touch on the right etc.. Is there a way to just ...
2
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1answer
2k views

Does Cyanogenmod Kernel support loop devices?

Since I am failing to mount a Nandroid image and since I have read that the kernel needs to support loop devices for that I need to know if anybody has managed to mount a loop device on CM7 or similar....
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0answers
30 views

How to modify kernel to support OTG by sending current to USB port?

How to force kernel to send voltage from battery to usb port? I have otg support on my s3 neo i9301i but it won't provide power to usb port when otg cable connected. I tried to enable some drivers ...
3
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0answers
32 views

Can I flash a custom ROM and a separate custom kernel after?

I currently use a Galaxy S3 Neo and have recently flashed the latest Resurrection Remix ROM (android 5.1.1 based on cm 12.1). After doing this, I have experienced multiple random reboots which I found ...
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1answer
25 views

Why isn't Android using kernel v4+?

While i understand that the patches needed to "support" Android operations aren't in the mainline kernel distribution, I don't understand why it isn't being ported to newer kernels. Newer kernels ...
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1answer
90 views

Device file for USB controller/joystick not created

I've got an Android 4.1.2 device (OUYA) and a PSX-USB-Adapter with two Playstation controllers attached. Attaching it to the USB port makes the device show up in dmesg: <6>[ 331.002934] usb 2-...
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1answer
2k views

Cannot find HTC One in ADB, SD card not mounted, incorrect kernel for installed ROM, no backup

Pretty much what the title says. I have messed up big time. Because I am switching carriers, I have to switch back to the stock ROM. It is stuck at the loading screen, most likely because of a kernel ...
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5answers
38k views

How to find out if my Device's Kernel has Loop Device Support

I would assume most all of you know why I am asking this, but for those who don't, Loop Device Support of a Kernel on an Android device is utilized to mount a Linux Distro IMG file (Ubuntu or Debian, &...
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2answers
47 views

What is the difference between .dex and .apk file?

.dex and .apk file: What are they and how do they execute ?
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0answers
23 views

Debugging aboot with KGDB (serial)

I have a Samsung Galaxy S5 Qualcomm. Rooted and unlocked. Is it possible to debug aboot (android bootloader) with KGDB (kernel debugger through serial connection)? More specifically finding an address ...
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1answer
2k views

How do I mount an NFS share on an CM 12?

I'd like to mount an NFS share on my Android cell phone, with perhaps a mount-unmount button on the home screen. Any ideas of how to accomplish this? My /system/lib/modules is empty. It doesn't have ...
3
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0answers
70 views

Powersave governor VS Marshmallow Doze

After searching on Google and XDA for an answer (which I didn't find), I decided to pose this as a question here. So, I guess that the majority of us know about the so-called big difference between ...
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0answers
51 views

Does Android x86 support any PCI E WiFi cards?

In the Android x86 drivers list found at https://sourceforge.net/p/android-x86/device_generic_common/ci/marshmallow-x86/tree/firmware/ It seems that the only WiFi chipsets listed were laptop WiFi ...
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1answer
72 views

What does the ROM files (FACTORYFS, HIDDEN, CACHE, PARAM, etc.) mean?

Flashing my Galaxy S 2 i9100 (after breaking with CyanogenMod update CM-13.x) I used the following command: sudo heimdall flash \ --FACTORYFS factoryfs.img \ --CACHE cache.img \ --HIDDEN ...
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0answers
63 views

Which one to install- 32 bit or 64 bit kernel?

Although I'd flashed my phone with new ROMs several times, I've never tried flashing the kernel before. When I searched for a custom kernel, saw 32bit and 64bit version. So how am I supposed to ...
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0answers
264 views

How to read/interpret Bluetooth HCI snoop log?

... to continue troubleshooting to my previous question: bluetooth - Nexus 6p - kernel wakelock - bluesleep - Android Enthusiasts Stack Exchange, I Enable Bluetooth HCI snoop log via (Settings -> ...
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0answers
28 views

Samsung I9300 Galaxy S 3 CPU default clock speed info Changed after installing Boeffla-Kernel

Original Clock Speed: Quad-core 1.4 GHz Cortex-A9 Samsung I9300 Galaxy S III - Full phone specifications But after installed Boeffla-Kernel it changed to Quad-core 1.6 GHz Cortex-A9 Looked up the ...
6
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1answer
3k views

AFwall+: Why does the Kernel need an internet connection all the time?

Since I started using AFWall+ (a firewall based on iptables) on Android, I was wondering why the Linux kernel tries to connect to the internet all the time? Allthough blocking the kernel I didn't ...
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1answer
45 views

Can I flash another phone's ROM or Kernel on my phone? [duplicate]

Can i flash another phone's kernel or ROM on my phone and what would happen is i did so?
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1answer
662 views

Is it possible to flash a boot.img kernel with twrp?

I'm looking to flash a cm based rom's boot.img on another cm based rom for my device both based on android L 5.1 with twrp 3.0 is that possible?
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1answer
25k views

Which Android runs which Linux kernel?

Is there a list of which kernel version comes in each Android AOSP version? Or lets say, which version /proc/version would spit out.
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0answers
33 views

linux kernel not seen from android filesystem?

I'm reading 'embedded linux' and in chp.6 "filesystems" there is a figure that I do not understand. here it says that the 'linux kernel' is not seen from android filesystem. This give me some ...
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0answers
141 views

How to boost voltage of headphone jack from kernel?

I want to increase my headphone jack voltage from kernel . How I can find the sound folder and sound module files in android kernel ? I used viper and other softwares , they are not powerful as ...
3
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1answer
3k views

How can I backup and restore Cyanogenmod 12.1 rom installed on my Samsung Galaxy 2 i9100?

Cyanogenmod(12.1)'s recovery has no backup or restore option. As I read in the answer of a previous post, CyanogenMod recovery is basic, so we should flash another recovery. The easiest way would be ...
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0answers
46 views

Can't sideload some apps on some kernels (idlekernel, Cyanogenmod kernel)

I always wanted to use idlekernel but once I install it, the apps would disappear (also happened on Cyanogenmod kernel). Usually the apps that it doesn't want me to sideload are the ones that gets ...
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0answers
5k views

Swap to Increase RAM but kernel issue

I have Micromax Canvas Doodle A111 phone with Android v4.1.2. My phone has 512 MB RAM by default. So whenever I try installing some new apps my phone becomes really slow so I decided to increase RAM ...
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0answers
202 views

Unpack and Pack the Ramdisk.img

I want to make some change to the ramdisk.img file and use that to bring up the emulator. I unpacked the ramdisk.img with the following command: gunzip -c ../ramdisk.img | cpio -i Before making any ...
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66 views

Extract boot.img from Emulator

I want to extract the boot.img from the android emulator. But I am not able to find it. I took the adb shell and read the proc/mtd file. This is content of the proc/mtd file. root@generic:/ # cat ...
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42 views

Galaxy S2 stuck at boot. Please help

Yesterday I flashed CM 12.1 on my Galaxy S2 gt-i9100. I rooted the device by flashing Siyah kernel via Odin. Then using cwm based siyah recovery I did the factory reset and wipe cache & dalvik and ...
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0answers
35 views

How to slow down boot on Samsung Galaxy S6 Edge

I made a custom boot animation in .qmg for my Galaxy but the system boots too rapidly, I try to slow it down. I searched in all the boot files how to do that but I did not found anything... One file ...
0
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1answer
793 views

Confirming the nature of a Samsung update, and declining it

I find it a little bit offensive to receive a "Software Update" message on my Galaxy Note 2 that does not disclose the nature of the update (an OS update? an app update?). software update message (...
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0answers
182 views

How can I enable/add USB OTG support to my rooted and Cyanogenmod installed Huewei Honor 4x?

I have tried stickmount but did not succeed in getting otg mounted. I basically want to use wireless mouse or keyboard. I think the kernel that is installed presently does not support otg. What is the ...
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0answers
256 views

How do I use external web camera though USB OTG on Huawei Honor 6?

Built-in kernel does not come with USB Video support and when using sideloaded uvcvideo.ko the camera works very bad (image is distorted, the device often crash). I can barely get even single 160x120 ...
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0answers
307 views

Lenovo S6000 - Auto power on after connecting charger

I searched the web to automatically power on my lenovo tablet after connecting the charger, but all the guides are for samsung and some other brands. File /system/bin/playlpm doesn't exist in lenovo ...
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0answers
49 views

Correct build choice for Nexus 7 lunch

I've been trying to install a kernel/bootloader/etc for my Nexus 7 wifi only model tablet and got this error from fastboot flashall, Device product is 'flo'. Update requires 'msm8960' or 'deb'. ...
0
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1answer
101 views

How to unroot and remove a custom kernal on android

I have had my Samsung s5 mini (G800F) for some time now and am looking to sell it. I rooted the phone and used a custom kernal that allowed OTG support for the phone. How do I remove the root and the ...
123
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9answers
48k views

What is the difference between: Rooting, Jailbreak, ROM, Mod, etc.?

What is the difference between: Unlocking the bootloader (prerequisite for doing many, though not all, other things below) Rooting Jailbreaking ROM NAND and Nandroid Operating System Mod (e.g. ...
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1answer
50 views

Android kernel decompiling?

I want decopile kernel to add futures like OC. I extracted ram disk ,dts (device tree source) and copiled kernel from boot.img. I also have other files like recovery ,system ,data etc. How decopile ...
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0answers
196 views

Do I have a FUSE-enabled kernel?

I would like toknow if my kernel supports FUSE. If not, how do I build or download one with FUSE support, where on the FS do I place the kernel? I don't want to install CyanogenMod. I have a Samsung ...
0
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0answers
245 views

How to get Kindle Fire HD out of boot loop

I was trying to change the lockscreen image on my Kindle Fire HD 7 [rooted] using a guide on xda-developers, when I copied framework-res.apk using ES File Explorer, the Kindle rebooted. It now has ...
0
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0answers
28 views

What is the point of separating the kernel and the rest of the operating system?

With all of the Android devices that I've seen, the Linux kernel and the initial RAM disk are placed in (the poorly named) boot.img and the rest of the operating system is placed in system.img or ...
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2answers
605 views

How can I find the name of the Kernel and its version that is running in my phone?

I had flashed Android 6.0 Marshmallow in My Nexus 5. As a part of a rooting process, I had to flash the kernel to allow SU binary to work. All is fine and root works well. Kernel is a intangible ...
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1answer
77 views

Can we modify or replace kernel and shell of an Android Device? [closed]

Is it possible to modify the kernel and shell of an android device? Devices like Samsung Galaxy S6 or Xiaomi Mi4i? If yes, how is it possible? Does the Manufacturer need to provide the Kernel before ...
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0answers
188 views

Run custom Android image in Qemu

Is it possible to compile and run a Samsung Android image (e.g., kernel for Galaxy S6 or older version) in a mainline Qemu? Samsung has released the source code for most of its mobile devices ...
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2answers
2k views

does flashing a kernel ever wipe anything on the phone? + Doing it without CWM?

does flashing a kernel ever wipe anything on the phone? and is it ever dependent on android version? e.g. 4.22 or 4.3 I have CWM and i've seen the option to install from zip within CWM recovery. ...
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1answer
196 views

How to determine if my device supports USB Ethernet controller?

I'm about to purchase USB-OTG Ethernet controller, but I read what it doesn't work on all devices. Furthermore, I've read what this functionality depends on Linux kernel been compiled with Ethernet ...