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

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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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108 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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410 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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66 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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711 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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227 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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144 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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269 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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245 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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104 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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284 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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171 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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56 views

problem with vga and kernels

I'm trying to do a clean installation of ubuntu 12.10 in my desktop computer. I have an Ati/Amd hd 6450 I tried the live-cd and it worked well so i proceed with the installation. It finished ok. and ...
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227 views

How can I direct make-kpkg to output .deb files to a different location?

I am compiling a new kernel on my Ubuntu 12.04.1 using make-kpkg. In order to do so, I'm doing the same process as suggested in izx's answer. However, I want to direct the generated .deb files to my ...
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565 views

disable initramfs in order to accelerate boot process

I was wondering if it is possible to disable initramfs on an ext4 partition in order to reduce the time it takes Ubuntu (12.04) to boot. See source here! Instead, setting up the root device directly ...
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Is this considered a minor kernel update from 3.2.0-24.38 to 3.2.0-35.40?

I am thinking of installing Ubuntu 12.04.1 LTS, 64 bit, English. It comes with a kernel version 3.2.0-35.40 One of my programs only support kernel version 3.2.0-24-generic. On ...
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411 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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100 views

Clean uninstall of kernel

During installation of ubuntu kernel 3.5.0.20-33 sthg. wrong happened, I guess during initramfs. How can I cleanly uninstall the kernel? apt-get remove --purge linux-image-3.5.0.20 and re-installing ...
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733 views

where can i get vmlinux file for running kernel

I'm developing several kernel module. Also i need some profiling to be done. As all my work is kernel modules, rebuilding kernel seems a overkill. I've seen KGDB/KDB and Oprofile is enabled in default ...
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142 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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435 views

Kernel panic on reboot after failed logical volume resize

I attempted to do a logical volume resize yesterday using the follwoing commands $sudo pvdisplay "/dev/sda8" is a new physical volume of "113.11 GiB" --- NEW Physical volume --- PV Name ...
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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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1 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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1 views

Using netpoll on Kernel 3.16

This was the question asked in stack overflow which is unanswered. The UDP packet should be sent from 192.168.56.2 to 192.168.56.1 (port 514) I checked with tcpdump on 192.168.56.2 and wireshark (+ ...
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20 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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9 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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19 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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9 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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22 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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26 views

Low resolution on 14.10

The Ubuntu kernel team asked me to try out kernel 3.17-rc5. In installed that kernel, rebooted, and performed the requested testing. However ever since that the X.Org driver for my ATI graphics has ...
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4 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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27 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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29 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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40 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 ...
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6 views

PCIE module options

Exactly after last kernel upgrade, my HDD started to make errors, switch to Read-only operating system, etc. I'm using a PCIE card to connect this SATA2 HDD to my Ubuntu Server. dmesg lists some ...
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13 views

How to deal with very frequent failure to inform the kernel about modifications to partition?

Moving multiple ext4 and vfat partitions in gparted 0.19.0 on Ubuntu 14.10 constantly causes Error informing the kernel about modifications to partition /dev/sda13 -- Invalid argument. This means ...
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Kernel Tuning Tools?

How to improve performance of a Kernel ? Are there any tuning tools to improve Kernel performance ? Thank you.
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What does it mean for /proc/kpagecount to be zero

for some entries in /proc/kpagecount, all the 64 bit entry is zeros and yet the page is allocated (confirmed from /proc/kpageflags). What does it mean for kpagecount to be zero for certain physical ...
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10 views

My kexec is broken with Utopic Unicorn

I am unable to do proper warm reboots with kexec since the release upgrade to Ubuntu 14.10 on my Lenovo ThinkPad T410. When I get to Starting new kernel..., the system does a cold reboot (full reboot ...
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74 views

Ubuntu frustrating crash

I am experiencing a freeze once in a while. When my computer freezes, only the mouse can move but it cannot click anything. In addition, I cannot switch to terminal using alt + f1 or ctrl + alt + ...
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33 views

Upgrading Kernel Breaks Several Features

I've recently made the switch from Windows to Ubuntu 14.04. I'm sure you can imagine my excitement when I started the OS, and found it to be almost completely ready to go out of the box! After a few ...
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27 views

Error after start instalation

Can this be disabled? thx for any help
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69 views

Dell 5737 freezes on ubuntu14 everytime during resume from suspend

My dell 5737 laptop was running all fine on 12.04. As soon as I upgraded to 14.04 I am consistenly running into system freeze everytime system attempts to resume from suspend. This happens when I ...
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10 views

Modules in /proc/modules address issue

If I cat of the /proc/modules the RAM address location of modules is always 0x0000000000000000. Any ideas? vmnet 51316 13 - Live 0x0000000000000000 (OX) parport_pc 32701 0 - Live 0x0000000000000000 ...
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21 views

How do I implement multiple keymaps into a kernel?

my problem is as follows: I have a custom-made kernel that has no functionality in regards of changing the keyboard mapping. It is possible to compile a different keymap into it, but that's it. The ...