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

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Latest kernel update (.43) crashes my pae system

I have been happily running a 14.04 system but the latest kernel update has frozen my system. The background; I have been using the 32 bit ubuntu distribution (I have no idea why) and booting with the ...
0
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1answer
684 views

Problems with linux-headers and apt-get -f install

It has been a long time since I've asked for help, but I'm in dire need now. Some time ago, I set up a friend's computer with 10.04. He's still running it but somewhere along the way, he started ...
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0answers
7 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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0answers
23 views

uvd not responding… cant start ubuntu

I am new to ubuntu. When I installed (stand alone) ubuntu 14.04.1 on my laptop, it wont load and it shows error that uvd not responding a few times and then shows uvd not initialized and hangs I tried ...
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0answers
19 views

Dependencies issues linux-image-3.13.0-43-generic

Was setting up Postfix but didn't get too far, because Ubuntu returned an dependencies error. Tried to fix this but I cant find the cause to the problem. dpkg: dependency problems prevent ...
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0answers
17 views

Ubuntu 14.10 touchscreen not recognized anymore on XPS 15 9530 Haswell

I've a Dell XPS 15 with Ubuntu 14.10 and I've just realized that my touchscreen does not work anymore. It's not even recogized: $ dmesg |grep -i touch [ 3.179897] psmouse serio1: synaptics: ...
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2answers
29 views

How to uninstall kernel modules?

I m doing my project in ubuntu on kernel version 3.10.48. But due to compatible problems, we had to change the version (recompile the kernel) to 3.17.6. Now, as I had assigned 50 GB to ubuntu only 9 ...
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1answer
55 views

Non Sudoer Access to a Kernel Module

Is it possible to access a kernel module if a user is not sudoer? I am trying to access a KVM, which is kernel module, as non-sudoer but I am getting an error: Could not access KVM kernel module: ...
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0answers
15 views

free space in boot for upgrade to 14.04

Can not upgrade to 14.04. Not enough free space in /boot again. No obsolete kernels detectable. What gives? :~$ ls /boot/ abi-3.11.0-13-generic initrd.img-3.11.0-26-generic ...
2
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1answer
548 views

elantech touchpad - multi touch is not working for kernel 3.13.0-35-generic

I recently updated my kernel to 3.13.0-35-generic,after update my elantech touchpad multi touch stopped working I tried fixing it from here ...
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0answers
9 views

Write udev rules for serial device

I have one concern regarding device name assign by kernel like /dev/sda* , /dev/sdb* ... etc but i would like to write rules for assign name to new pattern like "/dev/sc**"(starting with modified ...
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1answer
183 views

Updating kernel version from 3.2 to 3.8.0 wired connection not working in 12.04(LTS)

After updating kernel version from 3.2 to 3.8.0 wired connection not working in 12.04(LTS) $ uname -r 3.8.0-030800-generic $ ifconfig -a eth1 Link encap:Ethernet HWaddr 9c:2a:70:cd:f2:c5 ...
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2answers
60 views

I think I accidentally removed the current linux kernel when trying to free up space in /boot

Sorry for being a bit long-winded, but I am not sure what has happened so I'll try to state what has happened as completely as possible. I am currently logged in to the system and it's running. It is ...
2
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2answers
10k views

How can I install 3.16 kernel on Ubuntu 14.04

sudo apt-get update && sudo apt-get dist-upgrade do not show the newest kernel. How can I install 3.16 kernel on 14.04?
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0answers
10 views

how to avoid loosing kernel changes throgh updates?

I'v modified kernel to enable SPIDEV on Pandaboard Ubuntu. Unfortunately I am loosing this devices every kernel update. Is there any posibility to avoid it, so I do not need another day to compile the ...
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0answers
14 views

Configure webcam

I see a garbled image when using my web cam using Cheese or Skype using uvcvideo kernel module. I am aware that this is a known bug, but does it have a solution yet? Links: Kernel modules with ...
4
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3answers
540 views

Boot hangs after upgrade to kernel 3.13.0-43

I just upgraded from 3.13.0-40 to 3.13.0-43, and now I can't boot- my system hangs at the ubuntu splash screen with the five orange dots. My fans are all running full-tilt, and the system is ...
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0answers
19 views

Periodic lockups showing kernel: [154858.820009] [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed… render ring idle

System is Ubuntu 14.04.1 LTS with kernel 3.13.0-43-generic, I have noticed the lockups periodically since 09/13/2014. I can't remember what kernel version was in use then possibly kernel ...
3
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2answers
124 views

When will kernel 3.14 be available in the repositories?

I see that kernel 3.14.1 is available for Trusty at http://kernel.ubuntu.com/~kernel-ppa/mainline/ When will this kernel be available for upgrade via the Ubuntu repositories. (I know that I can ...
1
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2answers
37 views

Looking for a driver for a tablet, I heard that I “need a kernel”- what does that mean? [on hold]

I'm new to everything and I've heard a lot about tablet drivers that work with a kernel. However, I don't know what a kernel is and how to use/download it. I've seen a lot of codes with the drivers ...
5
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4answers
2k views

apt-get does not find suggested package (perf tool)

I am using performance counters (https://perf.wiki.kernel.org/index.php/Main_Page) on Ubuntu 13.10 x86_64. If I type perf I get: perf not found for kernel 3.11.0-031100 You may need to install ...
0
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0answers
43 views

Lost audio after updating kernel from 3.13.0-40 to 3.13.0-43 [on hold]

I updated the kernel image on 2014-12-12 from version 3.13.0-40-generic to 3.13.0-43-generic and as a result I lost my laptop's audio. I am running Kubuntu 14.04 LTS on a Lenovo Thinkpad T540p laptop. ...
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1answer
3k views

How can I troubleshoot why Ubuntu keeps crashing on my laptop?

I have a one year old Acer Aspire 4752G netbook running Kubuntu 12.04 LTS with all the latest distribution updates installed. It was previously running great until about a week ago when it suddenly ...
0
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0answers
18 views

Can't install any app [duplicate]

I am facing problem installing / updating any app on my system. I did some Google and came to know /boot is 99% full. I tried increasing it but everything failed because everything gets stuck at gzip: ...
5
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7answers
3k views

Why does hibernate not work after update from 13.10 to 14.04?

I have just updated my Xubuntu 13.10 to 14.04. Did not change anything. Suspend-to-RAM (standby) and hibernate both worked well in 13.10. Now hibernate does not work any more (suspend-to-RAM still ...
2
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3answers
3k views

Ubuntu 13.04 installation issues: unable to handle kernel paging request error

I wish I could say that I’ve done more for the Linux community as of recent but I am very VERY new to all of this and I feel very much in over my head. I figured I would install Ubuntu. on my computer ...
5
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3answers
4k views

How do I fix the 1908 Virtualbox error?

I have the following error: Kernel driver not installed (rc=-1908) Please install the virtualbox-ose-dkms package and execute 'modprobe vboxdrv' as root. This forbids me to launch any virtual ...
0
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2answers
27 views

Unable to upload files with any browser on Ubuntu 14.04, why?

please, I need your help. I have a weird problem. I am unable to upload files to gmail, gdrive, facebook nor other website with Ubuntu 14.04 I am able to ping google, watch youtube videos and ...
0
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0answers
7 views

linux modules do not autload after updating

I did apt-get update and since that moment, something in config files probably changed, however since that moment modules in my kernel (kernel wasn't updated) do not autoload. I have to manually load ...
0
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0answers
29 views

Deleting Old Kernels But Saying I Dont Have Correct Permissions [duplicate]

Okay So I Have Tried To Download Synaptic And Allll The Other Thing This Forum Tells You To Do And Nothing Is Working, I Am Trying To Install The Recent Update For Ubuntu 14.04 But For Some Reason ...
2
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0answers
140 views

Encrypted disk kernel warning - initramfs image won't boot

After an upgrade to 14.10 on my netbook, I can only manage to boot with the old kernel remaining from the previous 14.04 installation. For the most recent kernels, I get this warning when they are ...
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0answers
43 views

Default Grub2 entry doesn't point lastest kernel version + “selinuxfs mount failed” boot error: how to repair?

I installed Ubuntu 14.04 in multi-boot with linux (Mandriva 2011/Grub Legacy). First it seemed to work. But on my first update in Ubuntu, I was "strongly adviced" by the system to update grub and got ...
2
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1answer
5k views

How do I fix a error on a failed module build for Virtualbox?

world. I'm trying to upgrade my system but I get the error: Error! Bad return status for module build on kernel: 3.2.0-37-generic (i686) Deleting module version: 4.1.12 completely from the DKMS ...
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0answers
263 views

Ubuntu 14.04 kernel update from 3.13.0-40 to 3.13.0-43 caused my laptop to hang

Ubuntu 14.04, just updated from kernel 3.13.0-40-generic to 3.13.0-43-generic and now I can not boot my laptop. It seemed that the new kernel came with some Navidia drivers that caused this problem. ...
0
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0answers
21 views

How to upgrade/ remove recompiled kernel version in Ubuntu 14.04?

I m working on process migration and for adding extra utilities, I recompiled my previous kernel version 3.13.0-24 generic to 3.10.48. Now I want to install Checkpoint/Restart tools (CRIU) which are ...
0
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0answers
22 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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1answer
40 views

Problem with VMware Workstation 8.06

I am a new Linux user, and I'm currently using the latest version of Lubuntu. I want to create a virtual machine with VMware because in VirtualBox I am not able to use DirectX in Windows XP. Even ...
42
votes
4answers
20k views

How do I install and use flashcache/bcache to cache HDD to SSD?

I want to know if there is anyone who has tried installing and running their kernel built with flashcache or bcache for SSD caching? How did you manage to do it?
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0answers
24 views

.conf in /etc/modprobe.d does not work [14.10]

I have that horrible buzzing sound in my left headphone (it's the same in windows, I think it's a hardware defect) so I want the sound chipset to automatically power off to get rid of that buzz sound ...
4
votes
1answer
1k views

Wrong kernel after upgrade — old kernel still installed?

I just upgraded from 13.10 to 14.04, but when I do uname -r, it says I have kernel 3.11. I want to have the default 14.04 kernel, (3.13 I believe). How can I get this?
0
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1answer
169 views

Remove Old Kernel to free disk space

My system has old Ubuntu kernels but I am unable to remove them. How can I remove my old kernel to free my hard disk. Here are some outputs of commands I tried: $ sudo apt-get remove --purge ...
0
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0answers
24 views

Terminal command to send an interrupt to mimic a new peripheral device connection?

Is there a way to send an interrupt indicating a connection of a new peripheral device? Being precise I want a standard user command that could perhaps mimic ps/2 mouse connection. My mouse keeps ...
0
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0answers
25 views

Header file for struct proc_dir_entry

I'm writing a firewall for the Linux kernel and I'm using the proc_dir_entry data structure (which I've found in the tutorial I'm currently reading). My firewall is conceived as a kernel module but ...
1
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2answers
67 views

Upgrading Linux Kernel 3.11 to 3.13 for Ubuntu 14.04 [duplicate]

When I upgraded to Ubuntu 14.04, apparently my kernel was supposed to upgrade from 3.11 to 3.13. Unfortunately, the kernel upgrade did not complete. As a result, I have several files for 3.13, but am ...
0
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2answers
1k views

Ubuntu 14.04 problems with kernel 3.17

Just upgraded to ubuntu 14.04 from Ubuntu 12.04. After a bunch of problems with my mouse and keyboard not working at the login screen with kernel version 3.15, I went to grub and switched to a lower ...
0
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2answers
79 views

kernel is outdated

I have troubles with updating my kernel. I'm running Kubuntu 14.04. uname -r output: 3.13.0-32-generic I clearly see newer versions in repos with sudo dpkg --list 'linux-image*': ... ...
1
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1answer
27 views

Change kernel config without compiling

Is it possible to change the kernel configuration of the running kernel without compiling it myself? In debian-based systems, there's the config file of the current kernel in /boot, e.g. ...
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0answers
21 views

Which part of the kernel powers on/off USB ports? How - the internals?

Please refer to this post: Power on/off USB ports . It is one thing to blindly replicate the codes in a terminal and get the desired results. I wish to know which part of the kernel does this work, ...
3
votes
2answers
3k views

Why do I get disk I/O errors booting the 3.2 kernel on a xen vps server?

I have a xen vps, which I just upgraded to the new LTS 12 Precise Pangolin. However, I see this error on booting: [ 12.848076] end_request: I/O error, dev xvda, sector 12841 [ 12.848093] ...
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votes
2answers
3k views

14.04 : How to disable discrete graphics card

I know 14.04 has Kernel 3.13 and is supposed to be better at dynamic power management. My problem is the estimated remaining time keeps changing. But on an average I see 5 hours. On same machine on ...