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

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2k views

Getting “read failed after 0 of 4096 at xxxxxx: Input/output error” error for LVM

I have system with Ubuntu 12.04. On this system used LVM for managing disk drives and similar mass-storage devices. When I used lvscan command for scanning all the logical volumes then it displayed ...
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91 views

Kernel 3.13.0.24 won't boot

I recently updated my Ubuntu to 14.04, which also resulted in the installation of kernel 3.13.0.24 Booting this kernel always resulted in a black screen, so I simply got rid of it and am now using ...
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77 views

traverse all the disks or get hd_struct by device name in kernel module

I'm writing a kernel module(on linux 2.6.32), to get the disk_stats of all the disks(not partition) in use. In other words, I'm getting the data just like what /sys/block/sda/stat shows, but in kernel ...
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606 views

“ERROR: Kernel configuration is invalid”

I have been stuck on this issue for two days now and couldnt find a fix for this. I installed a realtime kernel with sudo apt-get install linux-rt because KauNet (which is an ipfw extension) ...
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167 views

Blacklisted module is still loaded?

I have a problem with the module ivtv_alsa being loaded despite me having blacklisted it. No other module depends on it: # lsmod | grep ivtv Module Size Used by ivtv_alsa ...
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676 views

APEI generic hardware error

The following error message is shown while installing ubuntu 13.10 hardware error: Hardware error from APEI generic hardware error source 0 hardware error: APEI generic hardware error status hardware ...
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1k views

Linux stops at “Switched to clocksource tsc” after fresh install of 14.04 — Setup or reinstall?

I've been looking forward to installing the latest greatest daily build of Ubuntu 14.04 into my 'new' X301 Lenovo, which seemed promising as the OS preview from live USB worked rather well. ...
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516 views

How do I rollback Recent Updates? 50+ crash reports upon login

Am running 13.10 w/Cinnamon, but still have Unity installed. Everything was working fine until I responded to an update manager update notification. I tried rebooting into a prior kernel version, but ...
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103 views

SMP with iMac 27" (2013/14)

I'm a sysadmin for a University, and I was setting up a new iMac 27" triple booting Mac OS, Windows 8.1, and Ubuntu 14.04 x64. I have all of the operating systems working and booting procedures fine, ...
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46 views

How can I use the default generic kernel in a UEC Ubuntu Cloud Image?

I download a UEC style Ubuntu Precise image from http://cloud-images.ubuntu.com/ that I want to use in an OpenStack cloud, but I want to make some modifications to it before booting the VM. ...
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102 views

nvidia driver is not loading after kernel update

I downloaded Nvidia driver from Nvidia's website. I set up it under kernel 3.11.0-17. Every thing was almost perfect for me. It was even working after update to kernel 3.11.0-18. However I wanted to ...
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37 views

Changing kernel in a system not booting

I have a dell inspiron laptop and have just installed 12.04. The system hangs on boot after 'Switching to clocksource TSC'. I've searched all the questions here and had no luck changing bios ...
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277 views

How to install a custom Ubuntu Touch Kernel on the Nexus 10

I've just installed the latest version of Ubuntu Touch on my Nexus 10 tablet,but it does not fit my needs. Instead of it,I would like to install a minimal version of Ubuntu or Debian running with the ...
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17 views

Where to find a kingston pen drive in .config file

I was checking the .config file in the /usr/src/linux folder. 1.I was searching the name for my USB flash drive I couldn't find. By what name will it be there? 2.What happens if I copy the .config ...
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56 views

What should I learn before I dive into ubuntu-touch porting and development?

The documentation is a bit over my head. While I can understand the syntax for the most part, I have a hard time comprehending why specific parts, such as cyanogen mod, are important to the project, ...
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112 views

Kernel panic on boot: not syncing (HP dv6, Ubuntu 12.10 64bit)

I am running Ubuntu 12.10 64bit on an HP Pavillion dv6. Everything works fine except I randomly get a kernel panic "not syncing" when booting. After manually rebooting I usually get the same error; ...
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101 views

Can I use my Panasonic VDR-D100 in Ubuntu?

Is it possible to use a Panasonic VDR-D100 with Ubuntu? I have googled around and saw nothing related about it. The camcorder is so old. I want to be able to capture video with c++ but taught it best ...
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43 views

Upgrade from 10.04 to 12.4 shutdown in the middle of installation, and now i cant even run it live

I have had ubuntu 10.04 until yesterday, when my dad got home with a disc that has 12.4 on it, i quickly put it into the laptop and started the install, and everything was going fine, but apparently ...
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3k views

Error message: “This kernel requires an x86-64 cpu but only detected an i686 cpu”

I have already activated the AMD Virtualization option in the BIOS, but I continue to see the error. My processor is 64-bit compatible. PS.: Hi, i want to tell everyone that i found my mistake. I am ...
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494 views

Can I delete “generic” kernel if I use “low latency”?

I currently can't update my release as there is not enough space on boot. I just have the one kernel version there, but seem to have both the Generic and Low Latency versions. uname -r just shows ...
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93 views

“Service ssh restart” causes server to encounter Kernel panic

I just got my HDD's in my servers raid controller replaced with Intel 520 SSD's. Now after reinstalling the server (with ubuntu server 12.04 and with a newer kernel 3.8.0-29-generic) and installing ...
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313 views

blender does not start after kernel update despite reinstall

Hi I recently updated my ubuntu 12.04.3 installation with the new kernel 3.8.0.30 After that blender did not start any more with the message that: /usr/lib/blender/blender: error while loading shared ...
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530 views

cannot find import; DLL may be missing, corrupt, or wrong version. Wine kernel32.dll error?

I'm trying to install hard drive wiping software that was written for windows. I have downloaded wine and get through most of the installation process until the program tries to open. It is here where ...
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357 views

Cannot access local variables using systemtap

I am just getting started using systemtap. On my 64bit Ubuntu 13.04 system, I installed systemtap and dependencies + systemtap-doc and elfutils then added the ddep repository to my apt/sources.list ...
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597 views

Hyper-V frambuffer driver not working correctly

Running the up to date Alpha of Xubuntu 13.10 on Hyper-V (WIndows 8 Pro) I noticed the included Hyper-V frambuffer driver does not work as expected. According to the commit message ...
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571 views

Ubuntu 13.04 kernel panic after installing laptop-mode tools

Since my laptop was overheating I first installed Jupiter. At that point there was no problem. But then I installed laptop-mode tools. Now the problem is every time I try to switch from battery to AC ...
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157 views

Is it possbile to load module compiled under kernel 2.6.x to a system with kernel 3.8.x

I have Marvell USB wireless driver src which only supports up to kernel 2.6.8. Now my system is Ubuntu 13.04 with kernel 3.8 and I can not compile the src under the new kernel anymore. I found the ...
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309 views

Driver r8169 not working after installing kernel 3.9.8

I tried to install kernel 3.9.8 on my Kubuntu raring, but the network driver don't work anymore! (r8169) I hope that it is fixed as soon as possible. I went to kernel.org and there is written that I ...
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914 views

Cannot get Wireless working by any means on 12.04 (Broadcom Issues)

I am a linux newbie interested in getting to know my computer a little bit better. The last time I even tried linux was Ubuntu 8.04LTS (Hardy Heron). I am not scared of the terminal but I am not ...
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273 views

Kernel panics randomly

My system randomly crashes. I cannot reproduce the crash except using this command: echo c | sudo tee /proc/sysrq-trigger Everytime it crashes (like once a week). I can boot and work with the ...
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45 views

system log not perpetually scrolling?

rsystemlogd is installed - when running - then system log is scrolling too with kernel.log and logging of eth0. Now it happens that system log is not scrolling despite of that rsystemlogd is still ...
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614 views

Can't get kernel module `uinput` started

I'm trying to get my BD remote to work with my Ubuntu media server and XBMC. I've followed the directions here: http://forums.boxee.tv/showthread.php?t=15200 I get everything installed, but uinput ...
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355 views

Xubuntu with custom kernel : why is it using configuration from /boot?

I've downloaded the latest stable Linux kernel source (3.9.4), I'm running Xubuntu 13.04. I'd like to try to build my own kernel, as I'm quite comfortable at my hardware. As suggested, I did the ...
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243 views

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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932 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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462 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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316 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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121 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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447 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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376 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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302 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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109 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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309 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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298 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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52 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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328 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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2k 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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6 views

Kernel crash sometime

know anyone how I can fix my kernel? Sometime it crash... All my PC in that moment are freezing and I can't do anything, just after I reset my PC. And after it is turning on it show me that error ...
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15 views

Mouse not working ubuntu 12.04 LTS after downgrading kernal

Beginner here,I recently downgraded my kernal in Ubuntu 12.04 so I can install my amd driver (not yet tried) but there's only problem in this kernal my mouse can't move.Keyboard works fine ,I can open ...
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24 views

How to bisect kernel when good is v3.11.10 and bad is 3.12.0

since upgrading from Ubuntu 13.10 to 14.04 (changing from kernel 3.11.10 to 3.12.0+), suspend hangs occasionally on my 2 different PCs. It is reproducible on 14.04, 14.10 and still present in all ...