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

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dpkg error when installing linux

After running: sudo apt-get -f install or sudo apt-get install linux this error appears: dpkg: error processing linux-generic (--configure): dependency problems - leaving unconfigured dpkg: ...
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1k 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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817 views

Why the installation fails for this package? it says linux-headers not found but it is there

This package is failing to get installed, but the linux-headers are installed. root@sun-Alienware-X51:/var/tmp# uname -a Linux sun-Alienware-X51 3.5.0-28-generic #48~precise1-Ubuntu SMP Wed Apr 24 ...
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390 views

Latitude D630 Fan Not Working

I have a Del Latitude D630 That the fan never turns on. I tried FanControl. pwmsensors doesn’t show anything.
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127 views

how to downgrade kernel image using usb stick (live usb)?

is there a way to downgrade kernel on main ubuntu OS using live USB? thanx i read this: How to downgrade the Kernel on 11.10 , but it seems i need to have access to the OS, while in my case i cannot ...
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305 views

Ubuntu 12.04.2 showing a kernel panic at the startup

I'm using a Acer Laptop 5100 (Athlon 64 TK-53, ATI 1100, 320GB HD, 4GB RAM, Broadcom 4311 Wifi), and I was using for some time Ubuntu 10.04 and later 10.10 64-bit versions without a single freeze. I ...
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466 views

D-Link DGE-530T with Ubuntu 12.10

I really could use some help. I am quite new to this and I am officially completely lost here. I have been searching the web for a few hours now to no avail. I am running Ubuntu 12.10 and I have ...
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109 views

Installed kernel, and printer driver - No Unity?

I ran installation of printer drives for Epson Stylus S22 (From original website) The most recent installs are: 2013-04-10 12:06:53 install linux-image-3.5.0-27-generic:amd64 <none> ...
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413 views

How to enable switching Hybrid Intel/ATi with mux on Ubuntu 12.04?

I have notebook with hybrid intel/ati HD5650 graphic (with mux). I want to install previous kernel 2.6.35 like on ubuntu 10.10 because on that kernel a can switch my graphic without any problem with ...
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333 views

Why doesn't VMWare 7 recognize the Kernal headers for version 3.5.0-26-generic?

I installed VMWare 7.0 on Ubuntu 12.10 and when I run it I get an error that says: VMware Kernel Module Updater Before you can run VMware, several modules must be compiled and loaded into the ...
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67 views

how to stop adding unused module to loadable kernel module?

Is there any way how to stop unused module to loadable kernel module other than putting them in the mod probe blacklist.
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717 views

Kernel Panic error: Attempted to kill 'init'

After making a update on my Toshiba Satellite L300D laptop I started getting this error message: Kernel panic - not syncing: Attempted to kill init! exitcode =0x00000007 I am currently running ...
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372 views

Tried to install a Kernel, now i have mutliple problems!

I tried to upgrade the kernal to 3.8.2 but it didn't work. So after learning that 3.8 wouldn't work with bumblebee I tried to go back and install 3.5.25. It still didn't work. uname -r says: ...
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231 views

high interrupts

I have high Rescheduling interrupts and Local interrupts. while doing nothing my total CPU wakeups reach 275-400. While watching movies it reaches up 900-1000. And while browsing the Internet it ...
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145 views

No mouse after fresh install

I installed 12.04 64-bit on a 120GB SSD. I reboot after the install (no errors so far) and the mouse is not working. I tried depmod but this throws an error: /lib/modules/*****_generic is missing ...
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271 views

problems with network connetion after update to kernel 3.5.0-24

After release of ubuntu 12.04.2 I tried update my system with: sudo apt-get install linux-generic-lts-quantal xserver-xorg-lts-quantal unfortunately after that my network was not working. It just ...
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253 views

Unable to handle kernel NULL pointer dereference at 000000000000001b0

After doing the normal update-manager updates an hour ago on ubuntu 12.10, I rebooted my computer. Everything seemed to be going fine however as soon as the login gui is supposed to appear, the screen ...
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43 views

How do you rebuild and apply a portion of the kernel?

I was following the steps here to build my own kernel, which worked great, then I wanted to make a small tweak to the setup file (/arch/x86/kernel/setup.c) and rebuild it to see my message printed in ...
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106 views

Where do I get linux-headers-3.0.0 for 12.04

I'm pretty new to Ubuntu, so question may seem stupid. I have a module which used to work on my parents laptop. After several updates module no longer works, and I'm pretty sure, old kernel would ...
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285 views

Unable to install Ubuntu - Kernel panic

I was installing Ubuntu 12.10 but my computer shut down and every time I tried to install, showing the following:
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182 views

What priority to use calling sched_setscheduler

I am writing a server that I do not want preempted by any other user process or "low priority" kernel process. I'm using code like this: struct sched_param sched_param; memset(&sched_param, 0, ...
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416 views

Convert existing Ubuntu desktop 12.10 installation to have Xen Guest Support

It looks like previous versions of Ubuntu had a package called linux-ec2 that would install a kernel with Xen Guest support. I was unable to find any packages in specifically 12.10 that install a ...
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46 views

Linux kernel: page substitution policy

I am supposed to answer for homework which algorithm is implemented in Linux for the virtual memory page substitution and also give some extracts of the code to prove that. After some research I have ...
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288 views

Problems with booting Linux after updating kernel

After updating linux headers from 3.5.0-19 into 3.5.0-20 i faced booting problem. I don't know reason, sometimes boots normally, but sometimes i need to reboot 3-4 times. I tried to boot with recovery ...
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146 views

VMPlayer does not flush all outputs to serial port

I am debugging a Linux kernel in the VMPlayer on Ubuntu 12.04 configured a serial port to a file to see the debug information. However, each time when the kernel panics, only the backtrace stack were ...
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1k views

WiFi can't connect after suspend

I've had this problem since Ubuntu 11.10 (my first install) but I was able to get around this issue with this answer. After I installed Ubuntu 12.04.1 I tried to use the same fix as before but I ...
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9 views

Ubuntu 14.10 touchscreen not recognized anymore on XPS 15 9530 Haswell

I've a Dell XPS 15 with Ubuntu 14.10 and I've just realized that my touchscreen does not work anymore. It's not even recogized: $ dmesg |grep -i touch [ 3.179897] psmouse serio1: synaptics: ...
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12 views

free space in boot for upgrade to 14.04

Can not upgrade to 14.04. Not enough free space in /boot again. No obsolete kernels detectable. What gives? :~$ ls /boot/ abi-3.11.0-13-generic initrd.img-3.11.0-26-generic ...
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8 views

Write udev rules for serial device

I have one concern regarding device name assign by kernel like /dev/sda* , /dev/sdb* ... etc but i would like to write rules for assign name to new pattern like "/dev/sc**"(starting with modified ...
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10 views

how to avoid loosing kernel changes throgh updates?

I'v modified kernel to enable SPIDEV on Pandaboard Ubuntu. Unfortunately I am loosing this devices every kernel update. Is there any posibility to avoid it, so I do not need another day to compile the ...
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13 views

Configure webcam

I see a garbled image when using my web cam using Cheese or Skype using uvcvideo kernel module. I am aware that this is a known bug, but does it have a solution yet? Links: Kernel modules with ...
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7 views

linux modules do not autload after updating

I did apt-get update and since that moment, something in config files probably changed, however since that moment modules in my kernel (kernel wasn't updated) do not autoload. I have to manually load ...
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20 views

How to upgrade/ remove recompiled kernel version in Ubuntu 14.04?

I m working on process migration and for adding extra utilities, I recompiled my previous kernel version 3.13.0-24 generic to 3.10.48. Now I want to install Checkpoint/Restart tools (CRIU) which are ...
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23 views

.conf in /etc/modprobe.d does not work [14.10]

I have that horrible buzzing sound in my left headphone (it's the same in windows, I think it's a hardware defect) so I want the sound chipset to automatically power off to get rid of that buzz sound ...
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24 views

Terminal command to send an interrupt to mimic a new peripheral device connection?

Is there a way to send an interrupt indicating a connection of a new peripheral device? Being precise I want a standard user command that could perhaps mimic ps/2 mouse connection. My mouse keeps ...
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21 views

Which part of the kernel powers on/off USB ports? How - the internals?

Please refer to this post: Power on/off USB ports . It is one thing to blindly replicate the codes in a terminal and get the desired results. I wish to know which part of the kernel does this work, ...
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24 views

Header file for struct proc_dir_entry

I'm writing a firewall for the Linux kernel and I'm using the proc_dir_entry data structure (which I've found in the tutorial I'm currently reading). My firewall is conceived as a kernel module but ...
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41 views

Ubuntu 14.04 : Core 2 Duo : System wont boot when Multi Core processing is enabled

I belive you guys are having good time. Well i am not!! I got an annoying problem with my Laptop(Thoshiba L310). She wont boot if Multi Core processing is enabled. On booting, just before i enter the ...
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42 views

Hard Disk SMART Attributes FAILING

I have a dual booted lenovo ideapad z510 computer - windows 8 and ubuntu 14.04 (mainly used). Since a few days, while I go into ubuntu, errors of not able to read from hard disk , kernel panic , etc ...
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29 views

Use new 3.16 kernel alsa firewire with qjackctl

I just upgraded Ubuntu studio to 14.10 with 3.16 kernel on a 2008 MacBook because it should support a lot of new firewire audio devices natively in alsa. I plugged in my Behringer ufx1204 with its ...
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30 views

Ubuntu not returning from suspend after kernel 3.13.0-36-generic

The latest kernel I have now is 3.13.0-40-generic but since upgrading from 3.13.0-36-generic none of the kernels have allowed my system to resume from suspend. I have to power cycle to get back in. ...
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49 views

Ubuntu 14.10 Kernel boot problem

yesterday I installed 14.10 on my laptop. Everything worked fine I installed the proprietary nvidia drivers and updated my intel graphics drivers. I rebooted after that and everything worked. Today I ...
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26 views

Kernel messages scrolling over Grub background image during boot?

I display a Grub custom background image at boot time(Ubuntu 14.10). I would like this background image to stay in place during the kernel startup and to scroll the kernel messages over the Grub ...
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32 views

Failure to boot after a possible power failure during upgrade from Ubuntu 13.10 to 14.04

I left my machine to upgrade from 13.10 to 14.04 overnight. I think there was a power failture. When I switched it on in the morning I got these messages: scanning fr Btrfs filesystems run-init: ...
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22 views

No Wireless drive detection in new built kernel for reverse bisecting

I need to do a reverse bisect for a bug and I narrowed the versions down to two. Now, I need to build a 8 new kernels. However, when I built them, the kernel cannot detect my wifi drive so that I can ...
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57 views

Problem installing NVIDIA drivers - mismatched kernel files(?)

This question was more long-winded than planned. In summary, I'm having trouble upgrading to cuda-6.5 with Linux 14.04. I think it's because I have some files for linux-kernel 3.11 and others for ...
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6 views

Is there a backport of ulogd2 for 12.04 precise?

I have a server with Ubuntu 12.04 running on Rackspace cloud, configured to use the latest kernel. A week ago or so I rebooted the server and it booted on a new kernel 3.17.1 (that had been released ...
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52 views

Lubuntu kernel headers configure

I get this error: ERROR: The kernel header file '/lib/modules/3.13.0-39-generic/build/include/linux/version.h' does not exist. The most likely reason for this is that the kernel ...
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102 views

Failed to load ZFS module stack

Have been using zfs on linux (zfs-native/stable) raidz on 14.04 for several months without hitch and decided to move across some more important files as considered it trustworthy or I guess "stable" ...
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88 views

Intel Xeon Phi 7120p on 14.04LTS

I recently bought Intel Xeon Phi 7120p and plugged it into a computer running Ubuntu 14.04 LTS. The card shows up in lspci, but then I don't know what to do next. Should I install updated MPSS ...