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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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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8 views

How to install custom kernels in android phone? [duplicate]

I'm using NOKIA X which has android firmware but it's performance is very weak so I want to flash custom kernel to increase its performance a little.
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1answer
57 views

How to enable “double tap to wake up” in any android device?

I've heard about the feature "double tap to wake up". How to enable this option on my device My device details: Gionee P3 Lollipop Cyanogenmod 12.1 Kernel Version 3.4.67
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1answer
40 views

Can system apps be enabled/disabled directly from the filesystem?

System apps can be disabled by using pm disable [appname] and re-enabled in the same fashion. But is there a way to accomplish the same thing by editing some file(s?) somewhere? Context: My Android-...
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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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2answers
229 views

How to upgrade Android kernel version

I am running a Android device with a kernel version of 3.4.5 on a soc made by mediatek (MT6582). Now recently I found a within post with the stock untouched KitKat based kernel for MT6582. This new ...
4
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2answers
117 views

Why does Android differ so much from Linux?

I have read all related questions here, but they don't answer my questions or are not up-to-date since Android is particularly included in Linux kernel ( > 3.x.x). Why didn't Google just take a Linux ...
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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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0answers
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 ...
2
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0answers
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 ...
3
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1answer
87 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
31 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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2answers
56 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
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 ...
3
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0answers
81 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
73 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
106 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
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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458 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
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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1answer
52 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
1k 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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0answers
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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161 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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0answers
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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254 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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0answers
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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0answers
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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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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349 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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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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1answer
124 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 ...
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1answer
52 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
235 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
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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0answers
30 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
720 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
86 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
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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1answer
213 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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1answer
124 views

How to run 2 shell scripts from ramdisk?

I am attempting to setup my ramdisk to fire off 2 sets of scripts. 1 is ramdisk /sbin only, the others are user allowed scripts # Check Properties on property:dp.early_init.done=1 chmod 0777 /...
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0answers
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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1answer
28 views

How practical the number of cores in Android

I've often wondered how practical the cores usage in Android smartphones. I'm looking from technical perspective. The articles that I've read so far claimed either more cores is good or more cores is ...
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
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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0answers
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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2answers
91 views

Why one cannot download the drivers of the Android OS like we do in our pc's

I know that i sound kind of a noob but i had this question from the day i started tweaking my phone .I know that without kernel sources it is very hard to get drivers for the phone for the sake of ...