Tagged Questions

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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13 views

How to bundle modules with a kernel for recovery installation

I have compiled a custom Kernel for my HTC Desire 200 unit from htc's source. After my kernel is compiled i get a zImage file. I then use Android Image Kitchen, to take a standard boot.img file and ...
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0answers
22 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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0answers
12 views

Compiling the Source Code of ZTE v889d [on hold]

I just downloaded the source code of ZTE v889d (Gingerbread version) from ZTE official open source website. And then I got stuck. Which configuration should I have to compile that kernel?
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67 views

Extracting code from lk.bin (little kernel binary file) & preloader.bin

I have the lk.bin (little kernel) and preloader.bin (bootloader) from my android mtk6572. In ubuntu after doing hexdumps and string commands, have figured that the binary is a set of .c codes that ...
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0answers
35 views

dumpsys meminfo: differences between ICS and KitKat?

I noticed differences when I compare the meminfo of old Android and newer ones but I can't find documentation about it. Using the same apk, Graphics and GL only show up on KitKat and the usage on ...
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1answer
26 views

Trying to replace a modem but encountering errors

I've been having connectivity problems on my i9505 LTE on every ROM I've tried since August. Searching around reveals that the outdated modem is the source of the troubles, and that by using the ...
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1answer
43 views

What does it mean by letter 'g' in a kernel version string such as 3.4.0-gd59db4e?

In my Nexus 5 device, I can see the kernel version as follows: 3.4.0-gd59db4e I know 3.4.0 is the linux kernel version number, and d59db4e is short of a commit sha1. here is another example. I just ...
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0answers
9 views

LG G2 No Screen Need Access To Files [duplicate]

So my Sprint LG G2 (LS980) literally has no screen but I would like to be able to access it from my Windows pc. I don't think I had USB debugging enabled and without a screen I can't really do much. ...
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1answer
47 views

Is Android FAT / FAT32 implementation power failure resilient?

Does the android FAT/32 implementation handle sudden battery removal? I know that Symbian's 'Rugged FAT' (efat32.fsy) and Microsoft's T-Fat implement this, but I've not been able to find any ...
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0answers
136 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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2answers
84 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
48 views

Using a wifi dongle to monitor network

I have an android smart box with a built-in wifi and I want to add a dongle to the box so that I can monitor the network. I have found a similar question with somewhat vague answer(at least to me); ...
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0answers
17 views

BatteryManager inner workings

I recently installed linux on a Sony Xperia Neo (on SD), but the Android kernel remains under the hood. I've only changed kernel initrd to boot off the SD's Debian. The real question is: ┬┐What is ...
0
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1answer
286 views

Programmatically, how does “rooting” a device enable access? [duplicate]

From a layman point of view, one would say, "Oh, I'm unrooted so I am blocked and access is not allowed." I want the programmatic point of view; telling me how an unrooted device doesn't have access ...
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1answer
625 views

Network Issue after flashing Cosmic ROM at Galaxy S Duos

I am a Galaxy S DUOS S7562 user and I have flashed Cosmic ROM v2.5 to my phone. However, I face some connectivity problems. My phone is dual sim but now it forever activates and deactivates both sims ...
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0answers
98 views

softbricked sgh-i337 at&t with 4.4.2 ota update

I have a sgh-i337 at&t usa GPe recently updated OTA, I tried to format my rom so I could patch my kernel and threw everything at it but the kitchen sink to clear the memory but could not get it ...
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0answers
32 views

looking for a kernel hack

I have am Samsung g4 with borked code and for forensics and repair reasons, I need to extract/pull a copy of the running kernel from the /boot sector which is only accessible via Odin. I have the ...
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1answer
136 views

How do you extract the boot.img from a samsung g4?

I don't image the adb command is able to access that sector of the device but for the record, when I connect, I can see the device but C:\Users\Brad2\Downloads\adbUnzip2Cdrive\adb>adb kill-server ...
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1answer
142 views

Where is the .config hidden on Samsung Galaxy S4?

cat /proc/config.gz tmp-mksh: cat: /proc/config.gz: No such file or directory Is there another place to find it?
0
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1answer
117 views

Help to understand working of powerbutton and volume rockers

I want to understand the workings of power button and volume rockers in Android devices, which are associated with the kernel driver of these keys. What happens in the kernel driver and boot loader ...
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1answer
35 views

Proprietary software distributed along with Linux kernel

What is the licensing rationale behind distributing proprietary (copyrighted) software within a common smartphone's Android system? I mean software like device drivers (camera, GSM modules etc.) or ...
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1answer
103 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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1answer
184 views

Oddities Reading boot.img - Way Too Big and Errors In Kernel

This is related to this question but as I've made some progress since and run into some rather different issues that would mean I'd essentially have to rewrite it to be a totally different question ...
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0answers
62 views

How to mount ubifs filesystem on android emulator?

I want to test the functionality of a custom ubifs filesystem on an android emulator (avd- Nexus 5). I have compiled and deployed a goldfish kernel(3.4) with ubifs support. But not finding the correct ...
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0answers
73 views

unable to export a gpiokey in /sys/class/gpio using Android kernel

I tried echo 36 >/sys/class/gpio/export. I am looking to read the activelow value for my gpio pin. Instead of getting gpio32 dirctory I am getting gpiochip32. All the gpio related /sys entry ...
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1answer
72 views

Is it possible to unload built-in kernel module?

I have a kernel with built-in module that I want to replace. I have built a .ko and tried to insmod it, but it failed since the kernel was already built with it. Is it possible to do this?
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1answer
33 views

Replacing the system partition without touching the kernel?

So I have an android phone that I'd like to put a clean rom onto, but it looks like there aren't any good kernels ported to it yet. I've done some reading into the android architecture, and come to ...
0
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0answers
13 views

Change default Hotspot IPAddress (192.168.43.1) or mac address [duplicate]

I have some 20 android devices. It seems all have the same IPaddress(192.168.43.1) and mac address(XX.XX.XX.XX.XX.XX). I have a problem. when I am switching hotspot of any device. And I am ...
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1answer
251 views

How to install custom kernel from source? - Galaxy Tab 2 10.1 (GT-P5113)

I have modified the kernel code in attempts to add a driver for USB to Ethernet. I have successfully compiled the code and am trying to install it onto my tablet. I am following the README that came ...
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0answers
96 views

Where is the current_now measurement generated

If you go into the adb shell, you can check what the amount of current the battery is discharging by using the following command cat /sys/class/power_supply/battery/current_now When the current is ...
0
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1answer
22 views

how can I change the contents of /proc/product_name_extra?

I have a rooted device and need to change the contents of /proc/product_name_extra from Prod to Eng. I have tried cp, mv, echo, and vi. I get IO error most commonly and no matter what perms I set I ...
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0answers
154 views

What is “Additional Safe RAM” (ASRAM) and how do I enable it?

What is Additional safe RAM? How can I enable this in my custom ROM? I am using AOSP KK version Linux Android Kernel. Any reference code for ASRAM would be greatly appreciated.
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1answer
676 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 ...
-1
votes
1answer
91 views

Reason behind issues in FairPhone OS 1.1 [closed]

The current version 1.1 of the Android shipped with FairPhones had some issues which should be fixed with the upcomming version 1.2. The two major ones are Camera apps (default and others) showing ...
2
votes
1answer
524 views

How do I find the kernel config for my ROM?

I'm very happy with CM11 ported to my phone(Samsung Galaxy Ace 2). One day I bought Bluetooth keyboard. When I tried to connect it, it paired and... wat? No connection!? I thought that this ROM has ...
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0answers
3k 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
263 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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2answers
254 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 ...
0
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0answers
255 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 ...
0
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0answers
166 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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2answers
989 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 ...
1
vote
2answers
6k 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
438 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 ...
6
votes
2answers
464 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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0answers
52 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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1answer
353 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
138 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 ...
3
votes
1answer
2k 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 ...
0
votes
0answers
721 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 ...
0
votes
1answer
155 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 ...