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 find out secret service codes for android

I have a Spice Dream Uno (Android One) and none of the secret service codes I found on the internet (like ##197328640## and ##7378423##) work on it. Do I have to root my phone in order for these to ...
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1answer
1k views

Android early boot console over usb

I'm trying to port newer kernel versions onto my Nexus S device. Most newer kernels panic very early on in the boot process. I would like to debug this. However, since the phone has been provided to ...
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1answer
107 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 ...
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0answers
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 ...
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26 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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16 views

Using android's BLOBs in GNU/Linux environment

I've successfully BOOTED to debian. I installed a regular debian file system under /data/debian with debootstrap, made a tiny init file in initcpio to tell it to switch_root to /data/debian and ...
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90 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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59 views

set pr_set_dumpable value to any apk on android device

I am trying to debug sigsegv errors in different apk files and found that many apps disable dumping the logs by setting prctl(pr_set_dumpable,0). Is there any way to get around this and get the ...
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1k views

Why does the Kernel and Android System/Android OS drain my battery?

3 hours since unplugging my phone, and at light usage it's at 61%. It is the kind of problem I've had with my previous phone, and I have with my current phone, often starting a few months in and ...
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161 views

What is the Despair kernal for Nexus 5 and 6?

I'm rooting my nexus 5 with android m and it asks me to install Despair Kernel. I can't find any info on what does the despair kernel actually do. Is it safe? What improvements does it have vs stock ...
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0answers
17 views

RCA tablet want to watch on monitor

I have an inexpensive tablet (RCA), and I want to hook it up to a monitor with a VGA hookup, I got the adaptor, micro USB on one side and VGA on the other. Hooked it all up, and nothing....I can't ...
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0answers
140 views

Is there any kernel requirement for installing Android Lollipop?

Is there a special requirement for a newer kernel in Android Lollipop? Can I use it with 3.4 kernel?
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144 views

Automatic turning on an android

i have found a solution of the problem of automatic turning on an android (not samsung), when battery is charging for this i've inserting the line /system/bin/reboot in the file /system/bin/ipod ...
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0answers
432 views

Any Fast Charge Kernel for Nexus 7 grouper? Franco Kernel?

I have the latest Franco kernel on my N7 2012 WiFi, normally it should be able to fast charge but I cant? Anyone have a solution or another kernel supporting fast charge for my device? This wont ...
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4k views

Nexus 5 takes forever and a day to charge

Since I have installed franco Kernel on my device, charging takes longer than normal (I'd guess 4-5 hours?). But today charging became extremely slow. I plugged it in overnight and this morning it ...
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110 views

What exactly happen when flashing new rom?

I searched for a while without any satisfactory answer. What exactly happen when you flash a new rom on an Android device? What the new rom contains of the Android architecture here: A rom (es: ...
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538 views

Updating Siyah Kernel to 1.9.1 on Galxy SIII i9300 ends in black screen after Siyah logo

I currently run Siyah 1.8.9 Kernel with CM 10.1 nightly (20130218), and I've tried to flash Siyah 1.9.1 with both Odin (PC) and through CM recovery. Both ways end up with a black screen after the ...
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467 views

Find PHYS_OFFSET value for mkbootimg

As I was following the instructions from here, I found a problem that my /proc/config.gz does not contain CONFIG_PHYS_OFFSET setting. But my /proc/iomem contains 40000000-5bffffff : System RAM. What ...
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213 views

Upgrading Kernel

I am somehow confused about the kernel and how it plays out. I have a couple of questions: Let's assume my device kernel reports its kernel as 3.0.8 (using uname -r). How can I figure out what ...
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856 views

Boot custom kernel via phone

I can currently boot a custom kernel (without flashing it) for test purposes by using fastboot on my computer via: cmd> fastboot boot customkernel.img Which works great. I've found great kernels ...
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319 views

Cannot turn on LG GT540 due to kernel panic

I cannot turn on my LG GT540. When I try to turn it on it displays a message which says: Linux Kernel Panic Process swapper (pid : 1 ) What does this mean? How can I fix it?
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27 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 ...
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27 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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19 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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29 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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18 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 ...
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49 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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62 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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25 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'. ...
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66 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 ...
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0answers
139 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 ...
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25 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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107 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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0answers
59 views

Run Bash Script from Terminal

I have modified a kernel's ramdisk to include a "settings" terminal run bash script. However, when I type in terminal su dp I get file is not found. dp exists in the ramdisk as /sbin/dp I've ...
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20 views

How to modify appsbl

I want to modify the appsbl partition for my device, I know the danger but I want to learn how to unpack and repack it. What method and tools can I use ?
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37 views

Devices names from android system

for several days I'm trying to find devices ( accelerometer, g-sensor etc ) names and placement of theirs drivers? I'm new to android and linux and can't figure out where can I find this info. I was ...
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0answers
285 views

Activating and loading kernel modules (uinput.ko) on CM12.1 sgs3

I recently installed CyanogenMod 12.1 on my Samsung galaxy s3 i747 (cm-12.1-20150526-NIGHTLY-d2att.zip to be exact). I want to use Synergy to share my computer mouse with my phone and to do this ...
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0answers
207 views

How to disable SELinux completely without recompiling the kernel?

When trying to port CyanogenMod 12 to my LG L9II, I experience problems with the wireless modem (3g/2g). I believe to have traced it back to the driver/kernel module not being loaded properly due to ...
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42 views

Recover from incompatible kernel

I have an old Evo 4g lte that I play with (it's not my primary device) and I got my self into a tough spot. I am currently S-on, and used flashkernelgui to change to the haunted kernel. I tried ...
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27 views

how to set or know scalling driver

I am trying to modify the scheduler/governor. For the same I need to know what CPUFreq Driver or scalling driver am I configured to run. 1.Where can I find what scaling driver am I configured to ...
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0answers
93 views

Is “Host GPU on” on android emulator same as GPU passthrough?

I see that there's "Host GPU on" for standard Android emulator(which is incidentally qemu-based) from Google. Is it same as the hardware acceleration obtained by successful GPU-passthrough in ...
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0answers
73 views

Franco kernel “audio boost” damage risk?

I was wondering what is the actual risk of increasing the "speaker audio boost" in Franco kernel settings? Obviously, the easy answer is to not to modify default settings to minimize risk, but I ...
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0answers
3k 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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4k views

Extracting code from lk.bin (little kernel binary file) & preloader.bin - MTK6572, mediatek

This is a changed question from the original, since nobody seemed to have answered, found most of the answer on my own. As stated before, wanted to fix my userdata and fat area blocks after hacking ...
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1k views

Can't mount SMB folders on rooted device

Android 4.3 on a rooted Samsung galaxy note. Astro file manager can work with my network (SMB) folders but the CIFS Manager app says "mount: no such device". (Mount Manager app doesn't seem to support ...
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2k views

internal sd storage partition/mount problem

I got my nexus 7 2013 a few weeks ago. It worked great for some time until I decided to flash a kernel that claimed to add support for CIFS windows shares mount. After installing this kernel, when the ...
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0answers
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What are the differences between Perseus and Adam kernels

I have a Galaxy S4 i9500 and have started looking into Android development and custom ROMS to get a feel on how they are made, what changes they provide and to what they focus on. But I always end up ...
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168 views

Touchpad buttons do not respond after flashing Kernel

I flashed a new ROM and Kernel on my Galaxy Player 5.0 USA version (YP-G70). I since then tried several kernels and the capacitive buttons (Menu/Home/Back - no physical buttons - just part of the ...
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0answers
295 views

One S reboots with new CM 3.4 Kernel

This is something that's been bugging me ever since the 3.4 kernel was released: Problem: I am getting intermittent reboots when using any ROM which is based on the 3.4 kernel. It happens totally at ...
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150 views

Sound on Power-On

I want a sound to be played when the user presses the power button, Since I am customizing Android for Visually Challenged people this feature might let them know if the tablet has actually powered on ...