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

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310 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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334 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

vgaswitcheroo has no effect

I have a Dual Graphics setup on my Laptop. [root@MISTRI ashesh] $ lspci -vnn | grep '\''[030[02]\]' 00:02.0 VGA compatible controller [0300]: Intel Corporation 3rd Gen Core processor Graphics ...
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23 views

Linux-Image-xxxx reported as Broken in package manager

I have been having some Kernel issues - installing new linux image or trying to go to older one all the packages get reported as Broken by Aptitude. $ sudo aptitude search linux-image | grep B iBA ...
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10 views

Kernel panic attempted to kill initexitcode=00000009 Dell inspiron 3000 series with ubuntu kernel 3.13.0-62-generic

I have a Dell Inspiron 14 3000 series with Ubuntu. I keep getting a kernel panic failure to sync attempted to kill init. I did a factory reset and tried a different kernel. currently it is ...
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17 views

Newly installed system won't boot, how to disable k10temp from GRUB2?

I just installed Ubuntu GNOME (via the minimal install, as no other Live CDs would boot) on a desktop computer which has an AMD Triple-code Phenom 8450 processor. The issue is, that after one reboot ...
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30 views

NUC 5CPYH + Intel 3165 + Ubuntu 15.04 or 14.04. Here's how.

This page describes how to get the Intel 3165 wireless card working on Ubuntu 15.04 on the Intel NUC 5CPYH. To fix this problem: Check the linux kernel you are using $ uname -r Even if you've ...
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15 views

Stuck with loading boot… Booting

I bought a Dell inspiron with Ubuntu... But it never works. I was stuck with guest session only. So I try to boot Ubuntu I was blocked by a "0.292496] - end trace f1953578386cb33c] ---- kernel panic ...
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15 views

Getting grub to detect ubuntu installation

I realize there are probably many questions about this topic already, however, I can't find a solution for my specific problem. I have an ubuntu gnome installation which I don't want to reinstall, ...
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8 views

Deleted Kernals, tried to update, can't do anything with full boot directory

I tried to run a backlog of updates for my ubuntu computer (lenovo T420 if that's relevant) and received a "your boot is full" message. I've had this before and decided to remove some kernals. The ...
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16 views

Trouble installing Ubuntu on a Gigabyte motherboard

So I've been reading around here about similar problems to mine but nothing helps. mainly because every one is having problems after the 15.04 update from 14.04 or 14.10. my problem isn't with ...
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15 views

Could not find kernel image kernal isoliunix/isoliunix.cfg

Since last 5 hours i get tired when i trying to install ubuntu through my flash memory and finally i surrender i trying all the solution in the google but nothing work i download Ubuntu 14.04.3 LTS ...
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13 views

WmWare Workstation 11 unable to start services

when I'm trying to finish the installation and the networking services try to start an error appears. this is what the log file says about: http://pastie.org/10369516 if this thread is repeated, ...
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74 views

Kernel panic Ubuntu 14.04 after accidently deleting the kernels

I was trying to free up some space in /boot by following this. I ran the last command which said it would delete all but the current using kernel. sudo apt-get purge $(dpkg -l ...
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76 views

Kernel 3.13.0-61 Update Won't Boot

I have an Acer Aspire V-7 running Ubuntu 14.04. Updating to Kernel 3.13.0-61 it no longer boots. I just get a black screen with a dash and nothing happens. Same thing with 3.13.0-62. The last working ...
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28 views

Failed to start Load Kernel Modules

I am new to ubuntu, so I will need some asistance uploading the log files as i am not quite sure where they are ATM. I currently have ubuntu 15.04 installed on a 250gb usb hd. For some reason after ...
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27 views

Ubuntu 15.04 Upgrade / LDM Issue / 219 / Black Screen

I am kinda a new in Linux/Ubuntu and the problem which I am facing now is way above my skill/knowledge: After upgrading Ubuntu from version 14 to 15 I cannot run my OS. It seems that the issue is ...
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21 views

syslog and kern.log multiple GB in size filled with pcieport error messages

After getting a disk usage warning, I noticed my syslog and kern.log were multiple GBs in size (20GB each). I then used this askubuntu post to clear the log files but today I find that they have again ...
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22 views

nouveau: kernel faults and Xorg sometimes stucks; or is it hardware at fault?

Not a long time ago Ī̲ got rid of AMD Radeon HD 7700 card and purchased nVidia GeForce 8600 GTS for an Ubuntu box, since many mouths shouted “don’t buy AMD for Linux, buy nVidia”. Then Ī̲ found that ...
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9 views

Xubuntu - Kernel panic

I'm getting a sudden kernel panic error out of no where. I even tried Boot-Repair but ended up with no luck Here's my boot-repair information - http://paste.ubuntu.com/12107541/ I'm wondering is ...
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13 views

New 12.04 Ubuntu install with kernel bug message on start?

I just installed a new fresh Ubuntu 12.04.5 on a Dell laptop, I had 14.04 but as I really love 12.04 stability I decided to get back to it. I have a Windows installed alongside which I just keep to ...
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20 views

Not getting logged in after upgrade to Ubuntu 14.04

Just after I upgraded my laptop (Ubuntu) Now it was getting console on booting. I used shift to select previous version of kernel. And its going to login screen ,but still after valid password its ...
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26 views

Kernel panic with bcmwl module

Recently, I have bought a Lenovo Yoga 3 Pro laptop and installed ubuntu 15.04 on it. After booting into a live session to install, wifi was not working. I googled that i have to install ...
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18 views

Update a kernel git tree checkout of an old release to current release, instead of full download?

I have an old checkout of git://kernel.ubuntu.com/ubuntu/ubuntu-trusty.git. I want to have a checkout of the vivid.git tree instead. Do the trees have a common ancestor (in the git sense of an ...
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86 views

module verification failed: signature and/or > required key missing - tainting kernel

i am newbie in linux device drivers,after installing the driver in ubuntu 14.04 it showing the message module verification failed:signature and/or required key missing-tainting kernel for my module ...
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36 views

Problems with Logitech Orbicam webcam image - Take 2

I believe i have the same problem described in this question: Problems with Logitech Orbicam webcam image I have a Acer Aspire 5612WLMi with Lununtu 15.04 (Kernel 3.19.0-25-lowlatency), the relevant ...
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8 views

Fresh install on Lenovo Thinkserver TS130

I've tried installing several builds of Ubuntu on this Lenovo Thinkserver TS130, and cannot get one that will boot without any user interaction. The build I'm working on is the 14.04.1 downloaded from ...
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20 views

Kernal Panic on ubuntu 15.04

I came up with a kernel panic panic error on 15.04. It says end kernel panic -not syncing..unable to mount block(0,0) Can anyone help me out with this??
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42 views

Freezing randomly screen

I've use Ubuntu 14.04 with Kernel 3.19 but some time, my PC block and I need to restart it to make it work and I don't know why... When I've join on Ubuntu, before the login screen he show me that ...
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28 views

Install linux 3.8.1 and wrapfs 3.8.13 in Ubuntu 14.04

I want to install and compile linux 3.8.1 and wrapfs 3.8.13 in Ubuntu 14.04. For this, I followed all the instructions on this post: Howto Compile and Install Linux Kernel 3.8 / 3.0 in Ubuntu 12.10, ...
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23 views

Upgrade 14.04 kernel without upgrading xorg

If I upgrade the 14.04 kernel to 3.19 using the linux-generic-lts-vivid package but I don't upgrade the xorg packages, will that cause an issue?
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8 views

Onboard does not work with touch

Onboard (the Ubuntu default onscreen keyboard) is working fine basically, but it does not work with touch. But this is what I need it for. I just can't press any button. I can press Onboard buttons ...
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28 views

Not able to boot after installing latest kernel Ubuntu 14.04

I am trying to build and install kernel on my Ubuntu machine. I downloaded source code of kernel 4.1.4 and installed it using $sudo make modules_install install I am getting error, Could not mount ...
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23 views

Kernel problem(KernelOops)

sometimes(almost every time) when I've put my PC on Suspend and after that I've open again, it's blocked, more exactly I can't move anything or open anything... I can't do nothing on it so I'm force ...
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18 views

How do I load Ubuntu from GNU Grub?

I've been trying to find out how to load unbuntu for a few days now, but I am at a point where I have no clue what I am doing... I'm not that savvy when it comes to Linux OS anyway... I've read this: ...
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55 views

SD Card Reader does not work with 14.04 and Dell Latitude e7440

I'm working with 14.04 with Xfce-Desktop. Because I work with 2 monitors I use the Ubuntu-Kernel 3.19. But since I've installed it my SD-Card Reader does not work any more. Can anyone help me?
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110 views

How to diagnose terrible performance on 15.04 kernel 3.19.0-25-generic

I am getting really bad performance running on my desktop machine since upgrading to kernel 3.19.0-25 and would like to know how to diagnose this. My suspicion is that it is something to do with IO ...
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0answers
15 views

Crash after loading kernel (installation)

I tried to install ubuntu on my samsung p560. Right after loading the kernel the system crashed and just reboots. So I tried installing with acpi=off noapic nolapic options. Then installation ...
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54 views

Dell Inspiron 3000 14" With Ubuntu Kernel Panic

I have the Dell Inspiron 3000 with the 14" display, Pentium Quad Core processor, and 4GB RAM that comes preinstalled with Ubuntu 14.04. It had been working very well, until some time last week, when ...
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0answers
16 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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29 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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56 views

Cant Remove Kernel, Not Found, No Space

I am running into a problem removing a kernel. I need to remove this 52 kernel to install some packages, but it keeps erroring out. I was wondering what steps I should take, its gummed up somewhere. I ...
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0answers
25 views

No modules in /lib/modules Linaro Deskotp

I am trying to run Linaro Ubuntu Desktop on an ARM embedded device - mainly for use of the Unity GUI. When I boot my device I get output to the screen and just before the boot process completes I ...
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0answers
73 views

Black Screen after install kernel 4.2-rc3 on Ubuntu 14.04.02 LTS

I hope you can help me, ever after compile and install the Kernel 4.2-rc3 or even the kernel 4.2-rc4 i get black screen on the primary display always, with the next steps you can reproduce this issue ...
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0answers
15 views

Computer does not start correctly

I'm running Ubuntu 15.04 on a Dell Inspiron. When the computer first starts, most of the time it just hangs on a purple screen. I have to hold the power button to get it to turn off. When it starts ...
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0answers
86 views

Ubuntu freezes, CPU soft lockup, intermittent screen artifacting

I am relatively new to Ubuntu and I am having a few issues, regarding the software or my computer I don't know. A little bit of background - I am dual booting windows 8.1 and Ubuntu 14.04.2 and I ...
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0answers
36 views

Wifi drops on apt-get update ubuntu 15.04

need help with Ubuntu 15.04, i updated the kernel to 4.0 and i don't know if that's the reason but the wifi broke on trying on update, be it with the software updater or apt-get update && ...
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0answers
15 views

Ubuntu 14.04 Server Keeps hanging, please help!

Have several servers all identical running compute services for openstack. All except one work fine. The one and only server randomly freezes and I can only do a hard reboot to restore it. When ...