for questions concerning Ubuntu's kernel, including compiling and questions relating to modules

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Compiling an individual kernel module (Debian/Ubuntu)

I need to modify the ELF loader's kernel implementation of an Ubuntu 14.04 distribution. Having downloaded the sources using: sudo apt-get source linux-image-$(uname -r) I ran the configuration ...
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52 views

Getting initramfs error after adding the system call in Ubuntu?

I downloaded Linux source kernel using sudo apt-get source linux-image-`uname -r` command then I have created a directory and added a very simple system call in a *.c file and have created Makefile ...
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69 views

Up/Down interface in Kernel

I am trying to write a Linux kernel module that with the correct command, will bring down the the network interface (lets say wlan0) change its IP address to the one specified, then bring the ...
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171 views

Ubuntu 14.04 Reboot instead of Shutdown after kernel update

After updating the kernel of my Ubuntu Server 14.04 from 3.2 to 3.13 (generic-lts-trusty) it seems to be impossible to shutdown (power down) the server from the command line. Upon shutdown -P 0 or any ...
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58 views

install packages depends in linux kernel automatically when upgrading kernel

I created a .deb file from my project and defined dependency on specific Linux kernel package such: linux-image-3.11.0.29-generic For every Linux kernel update I will compile a deb file and put it ...
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Need help for kernel compile

I am trying to learn device driver programming. for that i need to install kernel source tree. here i am I find the error when i try compile the kerenl. -- Copy our flavored configuration file back. ...
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38 views

error in kernel compiling

I am new in linux environment. I want to learn device driver programming. I find a tutorials which seem to me nice coz it is also telling how to setup environment. Kernel tutorial What I did 1. ...
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352 views

Unable to load Super I/O module even though sesnors-detect sees it

Firstly, I'd like to state that I've created a post in Ubuntu forums here : http://ubuntuforums.org/showthread.php?t=2267869 . I've had no replies and no progress since. I'm still stumped. Not sure ...
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92 views

Kernel Not Loading and Boot Fails on Windows 8 Pre-Installed Laptop

I know this question is common, but this makes no sense to me. I use to dual boot Kali Linux on my PC all the time. I know for a fact my flash drive (where the files are) is specifically (hd1,msdos1) ...
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452 views

Autoremove kernel: Headers are missing

While autoremoving an old kernel, I get: Removing linux-headers-3.13.0-45-generic (3.13.0-45.74) ... Removing linux-headers-3.13.0-45 (3.13.0-45.74) ... Removing linux-headers-3.16.0-30-generic ...
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19 views

Kworld UB430-AF stopped working over 1 year ago

An Ubuntu user detected and then reported this issue over 1 year ago (regression of kernel drivers): https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1266328, and it wasn't fixed as of today. Can ...
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103 views

How to change the kernel for one of other distro (Gentoo)?

I'm having a "funny" problem with a Acer Aspire One 751h and Ubuntu (and Fedora, and Slackware, and Arch, and Debian, and OpenSUSE and...), where the computer crashes randomly (and the screen shows a ...
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23 views

Post Boot Kernel Panics

I've been having an issue as of late. It happens when I try to play Dota 2. I get into a match, and sometimes my computer will crash randomly leaving this error: Keep in mind these crashes are ...
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3k views

D-Link DWA-171 Driver installation problem

Hello so i downloaded official D-Link DWA-171 drivers http://www.dlink.com/xk/sq/support/product/dwa-171-wireless-ac-dual-band-usb-adapter, But when i try to install them in terminal using ...
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929 views

Ubuntu 14.04.1/2 installation: Unable to install the selected kernel

I am installing a new Ubuntu 14.04.1 on my Server (HP ProLiant DL360 G4) from an USB Stick. The installation runs until the step "Install the base system". Then I get this Message: Unable to install ...
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New ubuntu server hanging… trying to locate root cause

Thanks to anyone willing to help me locating a root cause. I presumably think it is due to limited memory causing the server to halt. After a reboot the machine works for a day or 2 and then hangs. ...
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43 views

How can i automatically upgrade to mainline kernel

I am using Ubuntu 14.04. I know how to upgrade the kernel manually and I manually upgraded the kernel to 3.18.2. Is there any way to upgrade kernel to 3.19 automatically?
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47 views

Unable to resume from stand-by

I usually let my machine suspend to ram after time X. That used to work very well but within the last few days, I have had problems multiple times to wake my machine up and get it back into working ...
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190 views

Java algorithm performance difference between Linux and Windows

We observe a very significant performance difference of an algorithm in java between Linux (ubuntu) and Windows. The difference is 3x-4x in favor of Windows. Test machine is i3770 quad core (8 logical ...
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50 views

Segmentation fault at 7f59002b3978 ip 00007f59…(long message)

I was writing a program last night and I was using g++. I was running the program and left it in between to get some food. When I came back I forgot that the program was running and I shut down my PC. ...
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101 views

ubuntu file system memory allocation

While building ubuntu OS image from source how to allocate specific memory to specific folders of filesystem i.e. /home will get xx GB, /sbin will get xxy GB, /bin get yytt GB etc. Is there any ...
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62 views

There are no OS options in Dell Recovery.

I was messing around with partition flags in gparted while trying to resize one of my partitions.I ended up removing the boot flag and I forgot to put it back and restarted my laptop. And now, ...
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143 views

TV tuner Avermedia AverTV Volar HD PRO - 3.2.0 kernel

I'm trying to get my TV card Avermedia AverTV Volar HD PRO working on ElementaryOS (based on Ubuntu, kernel version 3.2.0-76-generic). I've tried some tutorials I've found, but nothing works, ...
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304 views

Adaptec 8805 kernel panic on Ubuntu 14.04.1 64bit

I use QUADStor with Adaptec 8805 and constantly falls into a kernel panic by reason of AAC (adaptec) Current driver version: 1.2-0 (30200) Clean installed system with quadstor ... same errors ...
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46 views

My Ubuntu 14.04 wireless is not working

I changed from windows 7 ultimate to Ubuntu 14.04 lts yesterday on an fairly "old" compaq presario-c500-rt155ea and now my wireless is not working. Also as looked for updates it came at some point of ...
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44 views

How to check kernel module list at boot time and their order?

I have questions as I wrote title over. We know, we can check loaded module list with command lsmod. By the way, at boot time, what does kernel refer to for loading modules? Any file about that? ...
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231 views

How to reinstall a single kernel module

A server has 3 network cards, one being rather old. All Realtek. All NICs work thanks to the r8169 driver (module). In order to use some extra features, the Realtek driver was downloaded from the ...
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54 views

How to rebuild kernel?

Need to test if all my dkms modules will be included to kernel in next update, so now I want to repeat update process with current kernel. How to rebuild it?
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237 views

Question about Ubuntu Touch kernel version

I'm using a Nexus 5 device installed with Ubuntu Touch for a while, and i've noticed that the kernel used by Ubuntu Touch is nearly the same as Android 4.4.4 and 5.0.2 are using. I'm very interessted ...
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38 views

Will compiling a new kernel destroy bumblebee?

I am using ubuntu 14.04, and I want to update my kernel from .14 to the latest one (afaik at the moment .18). Furthermore, I am using bumblebee for being able to lower my power consumption. Will ...
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49 views

Very weird behaviour when signal sent from Kernel to UserLand Process

So I am sending a SIGUSR1 signal from a LKM to a userland process. Assuming I have the PID of the user-land process, here is the relevant code from the LKM: void s3f_send_signal(struct task_struct* ...
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33 views

Are systemd fixes backported?

My initial Stackoverflow question is: here. Launchpad bug #1333140 here indicates a fix has been produced (thank you to all involved!), see extract below. systemd (218-10) experimental; ...
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111 views

Block device drivers for linux kernel > 2.6

I am new to drivers development under linux kernel. After starting with the simple examples from the book Linux Device Drivers v3, I realised that the block driver API has been totally changed since ...
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183 views

Boot DVD failed w/Kernel panic - not syncing: Fatal exception in interrupt

Trying to install Ubuntu 14.04.1 LTS This is a brand new ASUS w/ Windows 8 pre-installed. I'm not trying to do a dual boot or anything. I've searched the forums and google and have already disabled ...
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199 views

Kernel Panic after upgrade to 14.10

My new kernel panics and won't boot after upgrading to 14.10. The output with a stack trace is fed to the screen, but I can't roll up, so I don't know what the problem is. I can boot if I use the ...
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272 views

Compiling the Davicom driver on RK3188 chipset

I want to compile the module dm9601.c for ubuntu 14.04 on the mentioned chipset. I have read up the tutorials of Ian Morisson, e.g. here and here. I am also failiar with this. On an MK802 IV ...
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49 views

T9 keyboard using numeric keys

after bought an gamer mouse, that have 12 numeric keys at left side, i was wondering how to do an T9 keyboard to use that keys on ubuntu? I'm working with java but can't figure out how to integrate ...
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59 views

Cannot compile kernel?

I recently re installed my ubuntu and got it updated to 14.1..it has a generic kernel 3.16 as we all know..however, when I started to compile the kernel 3.19(downloaded from the official site) the ...
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144 views

Firefox crashes not due to plugins-latest FF on Ubuntu14.04

Firefox ver35.0 crashes after running videos for a while or even after seeing many .Gifs on Ubuntu 14.04 I have reinstalled FF and Ubuntu too. No luck. One window says; Must restart FF. Other window ...
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97 views

SCHED_BATCH policy for schedtool in Ubuntu 14.04

The INSTALL file of schedtool says that the SCHED_BATCH policy (-B) is implemented in kernels 2.6.16+. However, I am unable to use this policy in Ubuntu 14.04 (kernel 3.13.0-45)? The output of ...
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90 views

Openstack + Ubuntu Utopic/Trusty + nr_requests

Anyone know why ubuntu utopic/trusty doesn't allow to change nr_requests and I/O scheduler for instance that is running on the cloud using openstack? echo 129 > /sys/block/vda/queue/nr_requests ...
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45 views

Driver is automatically removed after kernel update

I had a problems with old wi-fi driver, so I have installed newer package, downloaded from the internet. Each time I had updates for kernel - this driver was removed after reboot, so I manually ...
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63 views

Is it possible to reduce the v4l source tree to just the modules I need?

I have a PVR card that needs a number of custom-built modules from linux-media (aka v4l). These are linked to the current kernel so every kernel upgrade, I have to set put the computer in a trance ...
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205 views

Logitech USB headset holding up parts of boot process

I am having problems with my Logitech USB Headset. When I have my headset plugged in when I turn on my computer, it takes longer to boot than usual. When I log in, all fonts are not anti-aliased, the ...
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102 views

Kubuntu cannot start, I'm thrown into busybox

What I did Changed the HD from my previous sony lap to a Lenovo P580, added the Windows drivers required and that worked, I did not check Kubuntu at this time but Grub2 was working. Several months ...
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110 views

error while booting xubuntu 14.04

I get a message on the screen every time I load xubuntu 14.04 on my xp mini, which says: " Support for core revisions 0x17 and 0X18 disabled by module paron allhusupport=0. Try013.allhusupport=1. ...
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2k views

How to fix “Could not connect to kernel driver.” hostapd error?

Hi everyone I have a problem when I try to start hostapd when I enter this command hostapd hostapd-minimal.conf I got this Configuration file: hostapd-minimal.conf Could not set channel for kernel ...
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Does anything bad happen when I type depmod?

When i was uninstalling virtualbox, I didn't see anything about removing virtualbox kernel modules, so I typed depmod in the terminal hoping that would output a list of installed ones, but instead it ...
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66 views

How to get normal terminal or impement new intel i915 drivers to 4.2.0-27-generic kernel

I had problem with intel i915 drivers (get gpu hang) like this on Linux version 4.2.0-27-generic (buildd@lgw01-12) (gcc version 5.2.1 20151010 (Ubuntu 5.2.1-22ubuntu2) ) #32-Ubuntu SMP Fri Jan 22 ...
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How to access the menuconfig when building the kernel from source?

My Computer is Applex ARMCHI 815, I need to install the Touch panel drivers. At the docummentation of dirver says. **2.1 Patch kernel module To install driver, please check module ...