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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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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52 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 ...
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34 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 ...
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460 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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34 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 ...
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34 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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47 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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211 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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350 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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91 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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2k 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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168 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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22 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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151 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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179 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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514 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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122 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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549 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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490 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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221 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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890 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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322 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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2 views

tspdrv.h not found error in kernel compilation for android

I am getting error while compiling Xiaomi mi4i kernel..please help.. http://forum.xda-developers.com/general/help/help-tspdrv-c-warnings-treated-error-t3424833
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Updating Kernel using custom ROM has no effect

My device had Android 4.1.2 updated it using a custom ROM to Android 4.4.4 so that i can run apps which didn't support Jellybean. Device details(Settings-> About Device) shows Android version as 4....
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22 views

Backup Kernel Modules/Drivers From an Installation of Android

How can I create a backup of all the driver modules (especially those that are not part of the original kernel) from an installation of Android? Note: No, this's not an XY Problem. There's ...
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38 views

can I safely flash ls675zv4 recovery on the ls675zv5?

So end goal is to carrier unlock a phone that can't be carrier unlocked by stripping it down to nothing, rewrite my partition tables, and flash some non"boost" Sprint software. I've double checked the ...
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43 views

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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30 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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75 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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81 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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162 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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255 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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68 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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45 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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40 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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298 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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55 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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236 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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267 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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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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213 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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88 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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35 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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43 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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139 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 Qemu-kvm?...
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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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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 ...