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

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766 views

Brightness setting in Lenov Thinkpad Edge E530 after update to kernel 3.8 not working

I used to run Dream Studio Unity (ivy bridge version) on sandy bridge on Thinkpad Edge E530 (B960 proc.), which worked OK, but after it updated itself to kernel 3.8 no more enables to set display ...
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1answer
264 views

AMD/Intel hybrid graphics driver on 3.6.6 kernel

I have an HP Pavilion G6-2303sh d4y36ea notebook. I installed Ubuntu 12.04. I had to update the kernel to 3.6.6 because the default didn't support the Ralink RT3290 wifi card. Now I'm trying to get ...
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1answer
245 views

Virtual mouse driver, possible problems with X11

I created virtual mouse driver according to Essential Linux Device Drivers book. After i wrote coordinates echo x y > /sys/ ... /coordinates into sysfs node, my program generates event packets through ...
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1answer
103 views

13.04 Not working period

I have reinstalled this 4 times now and cant seem to get it to boot now. I have a Phenom x6 AMD on a Gigabyte MB with 8 Gigs of ram and a Galaxy GeForce 210 GPU. Everything I have read is pointing ...
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1answer
48 views

How can we restore If all kernel has removed by mistaken it has RAID10

how we can restore the server if we removed the all kernels, and I have the RAID 10. in this case I try to recover with live-cd but I am not able to mounting partition because I have RAID10 ...
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1answer
2k views

cannot upgrade linux kernel to newest version

My current kernel version shown by uname -r is: 3.5.0-17-generic. However, there are files related to newer version kernel 3.5.0-26 in /boot. So I want to upgrade the kernel to 3.5.0-26 by running: ...
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410 views

Is kernel 3.5.0.26 (64bit) intended for 12.10 or 12.04

software updater suggests 3.5.0-26 for my current installation Ubuntu 12.10 My system: uname -a Linux pfeiffep-HPE-580t 3.5.0-24-generic #37-Ubuntu SMP Thu Feb 7 01:50:30 UTC 2013 x86_64 x86_64 ...
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1answer
379 views

Ubuntu 12.10 screen starts flickering after reboot

I have a Sony Vaio E series laptop. And I recently installed Ubuntu 12.10 on it. It was running all smooth without any problem, till I updated it (as we have to do after any normal installation of ...
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1answer
136 views

Compile AMD athlon-xp 32 bit kernel in intel 64 bit machine

Can someone tell me how to compile linux 3.7 kernel for amd athlon-xp in a 64 bit intel environment through chroot? I tried setting up a chroot environment but compilation gives me error. Thanks to ...
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1answer
4k views

How can I revert to the previous kernel version w/out dependency issues?

Since ubuntu updated my install to 3.2.0-37-generic, my laptop fan constantly runs. I never had this issue with the previous kernel versions. To fix this problem, I would like to revert back to the ...
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446 views

install of linux-headers-3.2.0-38-generic_3.2.0-38.59_amd64 failed at update

An error occurred during a regular update of my Ubuntu 12.04 installation the message box suggested to try apt-get install -f in a terminal window: ..... Entpacken von ...
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1answer
2k views

How to resolve dpkg error code 1?

I'm having issues with installing these two updates: linux-generic-pae linux-image-generic-pae Getting the following errors every time I try to upgrade: Setting up ...
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1answer
240 views

Cloning an encrypted hard disk to a different computer

I'm using 12.10 with full-disk encryption. Can I clone my full-encrypted hard disk from an old laptop and write it, as-is, to a new laptop and expect everything to work correctly right away? If there ...
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1answer
276 views

CK Kernel For Quantal Quetzal?

Are their any pre-compiled kernel packages for Ubuntu 12.10 that provide the CK patchset, or at least the BFS scheduler?
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1answer
199 views

How to get userID when writing Linux kernel module

Here is my function in my kernel module which I insert using insmod command after make at later stages. I am working on goldfish (2.6.29) asmlinkage long our_sys_read(unsigned int fd, char *buf, ...
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1answer
3k views

With Kernel 3.5.0-21 the wireless card Realtek RTL8723AE-BT stop working

Yesterday, I updated my Ubuntu 12.04 to the Kernel 3.5.0-21 and the wireless card stop working... In other threads I saw the same problem with another kernels. Anyone have the new driver? I sent a ...
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1answer
614 views

How to Choose default startup kernel ubuntu 12.04 with a GUI program

Is there any Gui program like the old startup-manager to control the default boot kernel behaviour in ubuntu 12.04? Thanks.
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1answer
438 views

Installation of Ubuntu 12.10 not sucessful in Samsung np100 notebook

After installation of Ubuntu 12.10 from USB made using the Startup Disk Creator, on new Samsung NP-N100S-E01IN notebook it does not boot. On booting the system just runs an update and stops with ...
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1answer
222 views

Ubuntu 12 installation problem

I have made about 30 copies of the Ubuntu installation CD, but there is no way to install it on my laptop. I get a black screen with a blinking cursor or I get a /casper/vmlinuz file not found or I ...
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1answer
441 views

Save kernel on Acer Aspire One270 with Ubuntu 12.10 - Booting Issues

I did search the forums for quite some time, yet did not find any answer to my problem... I have an Acer Aspire One D270 with Windows 7 Starter and I've installed Ubuntu using the Wubi installer. ...
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1answer
2k views

missing driver for smart card reader Ricoh Co Ltd RL5c476 II (rev b9)

Thanks for all who could help me to install a driver for smart card reader Ricoh Co Ltd RL5c476 II (rev b9). The driver is available here: Ricoh RL5C476 And according to ...
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1answer
206 views

How Grub top title can be changed

I am just wondering that 'How I can change the title on very top for Grub' - where it's written like 'GNU Grub version 1.99-21ubuntu3.4'? I am not asking for the menu entry, or to change labels of ...
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1answer
296 views

10.04 server won't boot off latest kernel

I'm maintaining a 10.04 server that is still booting off of the 2.6.32-28 kernel even though a bunch of later kernels are available. My best guess is that the immediately following version was purged ...
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1answer
661 views

Can't find “/sys/devices/system/cpu/sched_mc_power_savings”

I'm currently working on Ubuntu 12.04 x64. A lot of manuals about power saving in Linux tells about using parameters /sys/devices/system/cpu/sched_mc_power_savings and ...
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28 views

RE: specific item names in config files

Under a previous question 'Does Ubuntu use security features like DEP and ALSR' it was mentioned "if you aren't running a PAE kernel, or your hardware lacks the NX bit, Ubuntu emulates the NX ...
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1answer
2k views

VMWare virtual machine won't boot after 12.04 upgrade

I was running an 11.10 virtual machine on VMWare Workstation 7.1.5 build-491717. I tried to upgrade the other day to 12.04. After everything was downloaded and installed, the system asked to be ...
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1answer
474 views

Screen dim buttons not working on Toshiba Satellite

Since I have upgraded from the last 11.10 to 12.04 the screen dim buttons ceased to function. As I see this is due to the replacement of the 3.0 kernel with the 3.2 starting the system with the 3.0.19 ...
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1answer
1k views

intel atom getting too hot

I own an Asus 1215N which is getting very hot Intel Atom 525D dual core ION 2 (geforce 220 + GMA 3150) 4 GB RAM Ubuntu 12.04 it hits 86 C at idle. Some times (at load or turned on > 1 hour) it shuts ...
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1answer
401 views

How do I set up a server with a realtime kernel?

I have installed ubuntu server 11.04 on a machine with size 4GB. As, the ubuntu server 11.04 does not support real time kernel by default, I need compile a real time kernel on ubuntu desktop 11.04 ...
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1answer
34 views

Can't build Virtualbox-dkms - mismatched kernel and headers

I have previously used VirtualBox on my Ubuntu 14.10 machine, but I had not used it in the last two months. When I tried to start a VM, I got the following error: WARNING: The character device ...
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1answer
37 views

System Settings Missing/Bluetooth Settings/Sound Settings/Programs Missing?

Not sure what happened but all my settings are missing, I cant access any to make changes. When check under the dash not of the settings are showing as been instilled. Not only settings but some ...
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1answer
39 views

Black borders around windows/apps missing from dash after kernel update on Ubuntu 14.04

I'm having some weird issues with Ubuntu 14.04 64-bit. I updated the kernel to 3.18 (or at least I think I did...) using this guide here: ...
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1answer
36 views

bluetooth indicator and other settings not working after updating kernel to 3.16

So, today there was this update for the Kernel to 3.16 on LTSEnablementStack. I ran the command for the update. I notice that a lot of packages are removed, like the bluetooth indicator, but it seems ...
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1answer
41 views

Kernel Panic after upgrade to 14.10

My new kernel panics and won't boot after upgrading to 14.10. The output with a stack trace is fed to the screen, but I can't roll up, so I don't know what the problem is. I can boot if I use the ...
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1answer
13 views

Loading Session Applications

How does Ubuntu Load previously opened applications on startup? (I want to code and modify that functionality present in the system preferences manually )
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66 views

How do I get into recovery mode on ubuntu 14.04 if the option not showing

I just boot up my laptop then run the sudo apt-get update command, but there's an error says [username] is not in the sudoers file. This incident will be reported. .so I search the google for ...
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1answer
17 views

Kernel problem on TOSHIBA

I have a SAMSUNG with following specs Intel® Core™ i5-3210M CPU @ 2.50GHz × 4 Intel® Ivybridge Mobile 8 GB internal memory Ubuntu 14.04 64 bit Since quite some time now, my list of kernels ...
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1answer
298 views

Upgrading to 3.18 kernel causes wireless not to work

So I got the 3.18 kernel working on my system (I can boot into Unity now: hooray!). Unfortunately, this seems to have broken my wifi. Wired ethernet is still working, but Network Manager isnt ...
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1answer
27 views

Local version during kernel build broken

I'm trying to build a custom variant of the 3.13.0-43 kernel on Ubuntu 14.04. Following the normal procedure (directions posted at https://wiki.ubuntu.com/Kernel/BuildYourOwnKernel) is not working for ...
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1answer
21 views

Kernel Panic on xubuntu toughbook cf-19

I'm on a toughbook cf 19 xubuntu and I have a kernel panic about 10 times a day. Do you know what can be the problem?
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1answer
35 views

Trouble loading kernel 3.18

I received 3.18 in apt update but it does not show up on recovery list and I cant seem to get the missing parts. How do I get 3.18 to load?
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1answer
59 views

radeon dpm: why my power state 0 has high values which are not aligned with dmesg?

# cat /sys/kernel/debug/dri/64/radeon_pm_info uvd vclk: 0 dclk: 0 power level 0 sclk: 37500 mclk: 150000 vddc: 950 vddci: 875 pcie gen: 3 # cat /sys/class/drm/card0/device/power_dpm_state ...
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1answer
104 views

“Kernal panic - not syncing: Timeout synchronizing machine check over CPUs” Every time I boot from a live USB

I have been stuck on this for months but I built a new pc and every time I try and run linux off a live usb I get this after picking try ubuntu in the grub menu Sorry for cutting some of the ends ...
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1answer
63 views

How to remove kernel?

I have installed two kernel version 3.10.48 and 3.17.6 for project. As I am not requiring 3.10.48 any more, I wanted to remove that version as it is taking up almost 10GB of my disk space. How should ...
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1answer
123 views

Where can i find linux 3.8.11 kernel image in order to build wacom drivers for Samsung Chromebook 2

New to Ubuntu/Linux, so please bare with me. My setup: Samsung Chromebook 2 -> running Ubuntu via crouton (trusty with KDE). Im in the process of installing the Wacom Intuos drawing tablet, and i ...
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1answer
96 views

Right way to completely clean up old kernels in terminal

I have been going through various questions about how to clean up old Linux kernels. They all seem to have different answers and they are old, so someone is bound to say the question is too old and ...
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1answer
318 views

Cups job stuck at: processing since …“Waiting for printer to become available.”

When I reboot, a queued print job will get printed, after that jobs don't print with the following message: processing since "Waiting for printer to become available." Also, when I run the vanilla ...
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1answer
60 views

Accidentaly deleted initrd and vmlinuz

Yesterday I suddenly deleted initrd and vmlinuz files in boot folder. Now I can't get in my Debian system, because GRUB can't find vmlinuz and initrd. I tried to generate new initrd image but I can't ...
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1answer
18 views

problem new with ubuntu and i cannot install

I have neu cd ubuntu 12.04. With installation was everything ok and after restart i have error unable to monut root vfs kernel panic and cannot open root file. I tried to install this again but not ...
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35 views

After changing kernel , kernel crash is not working

I have changed the kernel in Ubuntu 12.04. After this, if I gave a kernel crash the memory configurations are getting changed and dump file is not created.. It is getting changed from 4GB to 109MB. ...