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

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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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555 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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116 views

Resolution problem after upgrading kernel

I have an ASUS laptop X53S and Ubuntu 12.04. After the last update to 3.2.0-50-generic, my resolution changed to 1024x768 and it is not possible to increase it as before. In System > Settings, I see: ...
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286 views

wifi on Ubuntu 13.04 for nexus 4 on Sony Vaio laptop with Kernel driver in use iwl4965

I just recently purchased a Nexus 4 phone. I already have an iPhone and the same is working perfectly with my Ubuntu 13.04 wifi hotspot created on Sony Vaio laptop. On searching a lot I found that ...
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139 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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293 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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776 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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254 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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43 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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509 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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307 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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241 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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856 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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406 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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131 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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309 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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113 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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427 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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374 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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253 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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148 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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107 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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293 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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197 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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51 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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304 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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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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18 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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58 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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13 views

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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14 views

Stuck in upgrade loop

When i want to "upgrade" i get this message Pakketlijsten worden ingelezen... Klaar Boom van vereisten wordt opgebouwd De status informatie wordt gelezen... Klaar U kunt 'apt-get -f ...
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16 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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8 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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16 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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20 views

Unable to compile INTEL 82599 driver on Ubuntu 14.04

I am trying to compile the drivers on my machine and I am getting the following errors: ~/ixgbe-3.21.2/src$ make install make -C /lib/modules/3.13.0-46-generic/build ...
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18 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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19 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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21 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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13 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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25 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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26 views

DualBoot, Ubuntu booting error - Kernel Panic - not syncing

I installed Ubuntu 14.04.1 LTS on a Computer that had only Windows 7 and now I am having an error booting Ubuntu. When I select in the Grub to boot Windows, it works well but Ubuntu seems to have an ...
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16 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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19 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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39 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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16 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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37 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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19 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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16 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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581 views

vmhgfs module not compilable for VMware Tools 9.9.0 (Fusion7.1) after Ubuntu Linux kernel update to 3.13.0-46-generic?

vmhgfs module not compilable for VMware Tools 9.9.0 (Fusion7.1) and VMware Tools 9.9.2 (Fusion7.1.1 Build 2496486) after Ubuntu Linux kernel update to 3.13.0-46-generic (Febr. 2015) (Shared Folder ...
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20 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; ...