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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Android 2.2 Galaxy S SGH-T959 kernel update with netfilter

I can't seem to find a kernel update for this phone that would include netfilter. Does anyone know a different way to install netfilter on this phone?
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45 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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0answers
18 views

Unlocking Bootloader Xperia L

I want to install cwm on my xperia L.So please help me which kernel should I flash ?
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0answers
34 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 ...
3
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2answers
243 views

What parts of the regular Linux graphics driver architecture is used in Android?

For example, could the Nouveau driver be used and provide hardware accelerated drawing when Android is compiled for x86?
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2answers
18 views

Go back to Stock Kernel

I upgraded to faux kernel not a long time ago and I am having a lot of issues with it. I want to go back to the original kernel. I even tried restoring to factory defaults but it didn't restore the ...
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2answers
1k views

Nexus 4, ART vs Dalvik Runtime: Which provides a lower battery consumption?

I'm using a Nexus 4 and currently using the Cyanogen Mod 11 ROM. I was using Paranoid Android Beta 4 for KitKat before but switched to Cyanogen Mod due to the stability that Cyanogen Mod offers right ...
0
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0answers
26 views

What really needs to be wiped before flashing rom or kernel?

Wiping Questions Does wiping cache wipe dalvik cache? What to do with dalvik cache in recovery when flashing when I changed the default from Dalvik to ART? When I flash kernel what partitions to ...
2
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1answer
434 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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0answers
34 views

Silent failure when connecting to VPN on HTC One Kitkat

I'm not sure exactly when this happens (since I normally use another phone for VPN work), but on my HTC One, updated to 4.4.2, connecting to VPN fails silently : the built-in VPN client, tested with ...
0
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1answer
47 views

I installed an incompatible kernel with CyanogenMod - what do I do?

I installed Faux kernel on my Nexus 5 with CyanogenMod 11. I forgot about CM's special kernel setup when installing Faux - how do I uninstall, or wipe my phone to reinstall CyanogenMod? I use ...
3
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3answers
16k 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, ...
75
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8answers
22k 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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0answers
39 views

Find source of display module (driver)

Howto find which module (driver) is used for display? I can see used modules with cat /proc/modules But is there anything more specific?
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0answers
193 views

MpDecision - cpu power consumption

I have a customize rom. With battery drain, about 3 times vannila/stock rom. with gapps, wifi off. proc/uptime show same wake time as stock/vannila for the same scenario possibilities of battery ...
0
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1answer
1k views

Samsung Note 10.1 USB Ethernet

I'm trying to get USB Ethernet support on my tablet, which for some reason is apparently disabled even though 4.1.2 directly supports it. (My Note II can use it...) I've come to the conclusion that ...
2
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3answers
13k views

Where can I find the stock kernel for my Samsung Galaxy S2?

I have a Samsung Galaxy S2 phone (GT-I9100). I installed clockworkmod, a custom kernel and rom (Resurrection Remix) earlier this year. One day I couldn't boot it anymore. I restored a backup of the ...
6
votes
2answers
254 views

Given that every application runs as a separate user, what happens when you want to add a new user account?

According to this, every application in Android runs as a separate kernel-level user, with a unique user ID and group ID. So, what happens under the hood when you add a new user (e.g. to your shared ...
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5answers
6k views

Why are there so many different Android kernels (technical answer please)

Isn't Android a common kernel that is used across all devices? For example CentOS will install on Dell, HP, and a variety of other hardware. Sure there are different modules but it's still CentOS ...
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0answers
32 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: ...
5
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2answers
4k views

Custom Kernels on Stock ROMs?

The General Question: Is it possible to install custom kernels on a Rooted Stock ROM? The Example: I have a Nexus 7 which I have rooted running 4.1.1 (Jelly Bean JRO03D) would it be possible to just ...
2
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1answer
117 views

Low level Android kernel hacking

Where can I find information regarding low level kernel hacking on Android? For example, I'd like to know how the device boots and follow the execution path from that point. Where exactly is the code ...
0
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0answers
102 views

Are all the cores online at a time when In-kernel Cluster switching CPUFReq driver is in use in SAMSUNG S4 GT-I9500?

I checked the file /dev/bL_status in Samsung S4-GT-I9500 (exynos 5410 Octa version) root@android:/dev # cat bL_status 0 1 2 3 L2 CCI [A15] 0 0 0 0 0 [A7] 1 0 0 0 1 and it says that ...
2
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0answers
880 views

Does CyanogenMod include a kernel?

I've installed CyanogenMod 10.1 stable for S III LTE (i9305), and noticed that my kernel version is 3.0.64 (I expected it to be 3.4 or something higher). As I've said in this question, the kernel I ...
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0answers
477 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
768 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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1answer
132 views

How to upgrade Avatar ROM's old kernel?

I've got an S3 LTE version (GT I9305), with CyanogenMod (Avatar) installed. I've tried nightlies too, however, I'm still running Linux 3.0 (shown in about in settings). And I've seen CM screenshots ...
0
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1answer
63 views

Relation between Linux and Android kernel versions [duplicate]

I know Android is a modified linux kernel, but does that mean there is any relation between the kernel numbers? In other words, Is kernel number (for example) 2.6.xx of Android somehow based on or ...
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1answer
239 views

where does default setting for Command Line Switches is set in kernel source code in android

My android device is quad-core . But during booting only 2 cores are up . CPU_HOTPLUG is enabled . In dumpstate i found : maxcpus=2 in command Line options. I wanted to make this maxcpus=4 . I have ...
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0answers
677 views

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 ...
0
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0answers
67 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 ...
4
votes
2answers
1k views

What is the difference between the Linux Kernel and the Android Kernel?

What are the modifications done in linux kernel to make it an android kernel ? By this question I mean what are the differences between linux kernel and android kernel ?
3
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2answers
355 views

How to interrupt Android boot sequence to force it boot to Linux kernel only

I am trying to do some low level performance testing related to device processor cores through adb which I feel it is affected by Android background services and system stuff. As I know that the ...
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1answer
640 views

What is the default Kernel Governor in Stock Samsung Galaxy Mega Android ROM?

I have rooted my phone recently and just installed ROM Toolbox which has several Governors available. It is using OnDemand by default, but I switched to Interactive. I just need to be as close to ...
2
votes
1answer
1k views

Where can I configure SELinux in Cyanogenmod 10.1.3?

Cyanogenmod released the stable version 10.1.3 yesterday and it apparently includes SELinux enhancements running in permissive mode per default. I thought that you could change the mode in the ...
0
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0answers
340 views

Cherry Mobile Razor - Changing the screen refresh rate

I have a Cherry Mobile Razor which I bought here in the Philippines. Specs are as follows: Mediatek MT6589 Quad-core Cortex A7 Processor PowerVR SGX 544MP 1GB LPDDR2 540x960 qHD IPS LCD Screen 4GB ...
0
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1answer
107 views

boot.img doesn't contain source code

I have a MTK soc phone rocking JB 4.2.2 with kernel 3.4.0. I have extracted the boot.img in Ubuntu using dsixda kitchen, however the extracted boot.img folder doesn't contain C source code. I have ...
0
votes
1answer
2k views

Signature verification failed when flashing custom kernel (Siyah)

I am trying to flash a custom kernel (Siyah-s2-v6.0b5-CWM) to my Samsung Galaxy S2. When I go to recovery mode, click apply update from sdcard, and select the file, it shows this: Finding update ...
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0answers
100 views

installion of CWM/TWRP added kernel

I have installed a MIUI ROM in my LT18i. The first step was installing a CWM/TWRP kernel which came along with the ROM package. Now, I want to install cyanogenmod custom ROM. This custom ROM guide ...
1
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1answer
809 views

rmt_storage keeps polling and spam logcat

In logcat I can see rmt_storage keeps doing something every 2/3 seconds I/rmt_storage(15279): rmt_storage open success I/rmt_storage(15279): rmt_storage shared memory ioctl success ...
0
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0answers
223 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 ...
2
votes
0answers
142 views

How CF-Autoroot works?

How CF-autoroot Theoretically is able to root android devices ? I'm wondering on what technics it use to run su ? Do it use a custom/patched Linux kernel ? or it is based on local root exploit ? I ...
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1answer
506 views

What is the method to debug Android kernel from booting in tablet?

I have to test a custom Android build on a tablet and I need to know the method to debug the Android kernel from booting in the tablet? The tablet has only a screen, 2 USB ports and an HDMI port.
0
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0answers
71 views

ACPUCLOCK and Overclocking

I have an HTC One with ElementalX kernel. I have overclocked it to 2.1GHz using SetCPU, but is the phone actually running at 2.1GHz? Someone told me Qualcomm has been locking SCPLL since the 8x60 ...
1
vote
1answer
469 views

Is is possible to install a new CM version and a custom kernel in one go?

Currently my workflow to update to a new CM nightly and reinstall my custom kernel is this: Install the CM update using the CM updater Boot into recovery manually and install the zip file containing ...
7
votes
1answer
4k views

l2_hsic prevents my device from Deep Sleep. How to fix it?

I have installed BetterBatteryStats and CPU SPY, because I noticed that I had a faster than normal battery consumption when the tab was left alone. I made a 30 mins test Wifi OFF, Flight Mode On, ...
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1answer
2k 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
345 views

Stable Kernel that Allows Overclocking of Galaxy Tab 2 10.1?

I'm currently running Cyanogenmod 10.1, I've seen a few tuts around that may or may not work regarding Kernels that allow one to overclock their Tab 2 cpu. Has anyone had successful experience with ...
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0answers
46 views

Static screen on android - overclocked

I'm seeing almost the exact problem as this, on old 2.2 phone. Random colored static like on the old TVs - on mine, it was almost exactly the same, but with distinct columns of somewhat darker or ...
2
votes
1answer
322 views

Does Android 2 support swap space?

With Android 2.3 being Linux-based, can Android 2.3 use a swap partition without being rooted?