Questions tagged [kernel]
Linux is the name of the kernel used in Ubuntu as well as other GNU/Linux operating systems. Use this tag for questions related to upgrading and installing kernels, compiling, patches, and kernel modules.
8,405
questions
4
votes
2
answers
7k
views
Switching back from development to default kernel
I'm on Ubuntu 14.04. My kernel version is kernel: 3.16.0-031600rc4-generic. I must at some point, for some reason, have switched to a development kernel but I can't remember how. How do I switch back ...
10
votes
2
answers
32k
views
Values of WCHAN in ps
What does the WCHAN (waiting channel) mean exactly? what can be its value and what those values represents? I tried to find them but got nothing.
0
votes
1
answer
422
views
How do I get rid of old linux-headers-3.xx.x-xx files? [duplicate]
I frequently run into the problem that I don't have enough space on /boot left. When that happens, I use this answer to free space.
The output of the command shown there gives me not only a bunch of ...
0
votes
1
answer
226
views
keep getting kernel 3.19.0-28-generic must be compiled
I have this problem and I even did:
sudo apt-get install linux-generic
sudo apt-get install linux-headers-generic
sudo apt-get install -y build-essential linux-headers-generic
But it didn't help, ...
0
votes
1
answer
2k
views
How to make a version of Linux kernel default in grub?
I am using Ubuntu 14.04 with Linux kernel 3.19.0.25. Earlier I had some issues with 3.19.0.28, my screen was freezing on boot, with 25 I am not facing those issues. So I want to make 25 my default ...
5
votes
2
answers
8k
views
"No network devices available" when wireless previously worked. (14.04)
I'm running Ubuntu 14.04 on my laptop. The last time I used it (several weeks ago) the wireless was working fine. I turned it on today and no networks will show up, with the network menu saying "No ...
0
votes
1
answer
2k
views
Frequency scaling no longer works after kernel upgrade
Using kernel 3.13.0-37, CPU frequency scaling works and I can control it using the CPU frequency control applet.
I have upgraded to kernel 3.16.0-38, the applet now informs me that CPU frequency ...
27
votes
2
answers
51k
views
How can I avoid kernel updates?
I want to freeze the kernel-version of Kubuntu 14.04.1 LTS Trusty. Is it enough to comment line 5 and 6 of the /etc/apt/source.list (see below)?
4 ...
5 deb http://de.archive.ubuntu.com/ubuntu/ ...
1
vote
1
answer
235
views
Secure Auth/Encryption Smart Keyboard
Due to the nature of a personal subnet (hardened on the outside, trusting/naive on the inside) I'm starting a project within my network (routed by a Ubuntu 15.04 Desktop with OpenVPN public/local ...
1
vote
0
answers
105
views
No sound anymore on Lubuntu 14.04.3, Kernel 3.13.0-63
The current version of Lubuntu (kernel 3.13.0-63 in use now) produces no sound anymore. Neither Audacious, Gnome player, YouTube or CD player produce sound. My installation CD (Lubuntu distribution 14....
5
votes
2
answers
1k
views
Kernel panic 1/10 times after resume from suspend
I have a HP Notebook 15 running Lubuntu 15.04.
On occasion after closing the lid and having my laptop suspend, I get kernel panic when I resume. Caps lock is blinking, and the screen locks - I have ...
0
votes
1
answer
266
views
Boot volume full?, problem removing old kernels
I know there are a lot of questions on this but I have been through a lot of them and can't seem to get past a problem.
Steps so far -
Removing old kernels via apt -> Fails due to lack of space
So ...
0
votes
1
answer
1k
views
Kernel driver not installed (rc=-1908) -- Again
After I read the solution in VBox on 14.04: Kernel driver not installed (rc=-1908)
I got following error after install ...
No suitable module for running kernel found
invoke-rc.d: initscript ...
0
votes
1
answer
1k
views
Can't make, says Kernel source is missing
I'm trying to follow the instructions here
http://wiki.freepbx.org/display/FOP/Installing+FreePBX+13+on+Ubuntu+Server+14.04.2+LTS
to install FreePBX/Asterisk on my Ubuntu server. When I try to ...
0
votes
3
answers
18k
views
br_netfilter missing in ubuntu 14.04
I have the following problem when running docker.io:
Running modprobe bridge nf_nat br_netfilter failed with message: modprobe: WARNING: Module br_netfilter not found.
I tried running modprobe ...
3
votes
2
answers
4k
views
How do I find out which driver version of BtrFS I am using?
I was reading through a couple of BtrFS articles online. Sometimes I saw statements like
Do not use BtrFS versions older than 0.20rc1.
How can I find out which version is in my Kernel?
1
vote
1
answer
313
views
How to get debuginfo package for -rt kernel
I have Ubuntu 14.04 with 3.14.3-rt4 kernel. I have to use SystemTaptool and I must have debug symbols to use it. I follow the instruction in here but there are no debug symbols for my kernel and when ...
1
vote
1
answer
472
views
Unmet dependencies, lost archives, and missing source packages while upgrading kernel to 4.2.0
While trying to update my kernel I found I was missing archives. This is the error message on my computer (and when I try to open synaptic to uninstall the packages)
The package linux-headers-4.2.0-...
1
vote
1
answer
952
views
What caused this crash shown in syslog?
What happened here? System was unresponsive when I attempted to log in next morning.
Sep 21 12:38:02 pratchett org.freedesktop.Telepathy.AccountManager[2233]: (process:2488): GLib-GIO-WARNING **: ...
1
vote
0
answers
235
views
kernel boot takes too long, probably asus makro key usb keyboard related
I would like to solve my long boot issue.
3.19.0-28-generic #30-Ubuntu SMP Mon Aug 31 15:52:51 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
I think it might be related to ASUS ASUS ROG Macrokey keyboard ...
1
vote
2
answers
2k
views
EXT4-fs error on Ubuntu 15.04 crashing after installing an HDD for extra space, Kernel panic on live USB boot [closed]
Earlier last week I went ahead and bought a 1TB HDD so I could store some extra files on my work machine. Now I'm having problems with the system crashing. The first time I got the following error ...
1
vote
1
answer
80
views
How can an internal hard drive be made completely inaccessible for the system?
I've "rescued" my whole main system HDD onto another fresh drive (using a live CD, to be able to easier access / and /usr from X11), and now I'd like to pretend as if I had physically removed the old ...
3
votes
2
answers
6k
views
AUFS driver not loaded / found on kernel 4.* branch
I've tried upgrading my kernel from 3.19.0-22 to any of the kernel 4.* releases in Ubuntu 15.04 but upon rebooting I've found that docker doesn't work anymore.
Sep 19 12:37:14 sniper docker[1098]:
...
1
vote
1
answer
202
views
How do I recompile my kernel without qt3?
So I'm trying to recompile my kernel (it doesn't have uinput support but nm that). I followed the instructions on How to install needed Qt packages to build kernel on 14.04?
but
when I run ~/...
7
votes
2
answers
12k
views
Can't start LightDM after recent kernel update
Whenever I boot, it show Plymouth then goes to a screen full of boot log, I -think- the only relevant part is Starting Wait for Plymouth Boot Screen to Quit...es.ileged Tasks.s..p link was shut down......
0
votes
2
answers
559
views
Disable IPv6 on 14.04 with IPv6 disabled kernel
How do i disable system wide IPv6 within ubuntu?
I know so many answers in here about this but situation is different. This is an embedded device.
Here is my conditions:
IPv6 disabled in kernel to ...
9
votes
1
answer
3k
views
Is it OK to delete the /boot/initrd.img file on a running system
I have a server with a RAID1 root partition, but it has a small partition for /boot on each of the two drives: I 'dd' one to the other whenever an update is made.
Unfortunately the /boot partition is ...
1
vote
0
answers
678
views
end Kernel Panic (14.04)
I'm new to Ubuntu, so you'll have to forgive my naivety.
I was watching TV online and my laptop froze (Screen darkened, nothing responding), I left it for around 5 minutes hoping it'd sort itself out....
2
votes
1
answer
617
views
Installing Linux 4.3 on existing Ubuntu release
Suppose we have a stable Ubuntu release installed, such as 15.04 or 14.10 (my case). Suppose we have no interest in upgrading userland software, but have a dire need for a state-of-the-art kernel (in ...
3
votes
1
answer
8k
views
How to check if the kernel version running is the one supported by Ubuntu?
When I boot my machine I get a list of installed available kernels to choose from, how do I know which kernel is the one that is supported by my particular Ubuntu distro version? See the following two ...
4
votes
0
answers
2k
views
How do I start my Laptop with root partition on lvm2 thin pool
My Laptop is configured as dual boot system with Ubuntu 14.04 (and windows 8.1). Lately I replaced the dedicated root and swap partitions with a lvm2 partition (VG (Volume Group) LinuxBereich) ...
4
votes
2
answers
418
views
How to report kernel issues
This is a followup to this other thread: USB ports not working all of a sudden
I'm working on an Acer Aspire E 15, with the OS being Ubuntu Studio 14.04.
I noticed that the last kernel version:
...
1
vote
0
answers
733
views
Kernel Panic - not syncing: VFS Unable to mount Root is on unknown-block(0,0)
I received a Kernel Panic error after updating Ubuntu server.
After passing the GRUB menu, I received the following error.
I have been hosting a mediawiki on that server that is not backed up.
I do ...
41
votes
4
answers
73k
views
bioset process - what is its function?
What is the function of the bioset process? Why is there no documentation for the bioset process? Why are there no definitive answers to the questions about the bioset process already posted?
What ...
1
vote
2
answers
1k
views
How do I identify the correct driver to blacklist in modprobe?
Without disabling anything in my bios, I want to disable and keep the OS from loading any drivers or registering the smartcard contact interface that is part of my laptop.
I understand that this can ...
2
votes
1
answer
1k
views
Displaylink installation Kernel version 3.13.0-55-generic is too old
I am following this guide: How to install displaylink on ubuntu
To install displaylink on my ubuntu 14.04.
Everything works fine however when i go for the last step and attempt to install the .run ...
1
vote
1
answer
312
views
Ksplice - What happen if server power-down when updating kernel
I am finding a rebootless solution for updating kernel.
I saw Ksplice.
I have a question:
What happen if our servers power-off when updating use Ksplice? Our servers will be OK? What will revert our ...
1
vote
1
answer
1k
views
Need help installing VirtualBox on ubuntu 12.04
I am running on chroot and the log file reads :
Uninstalling modules from DKMS
Attempting to install using DKMS
Creating symlink /var/lib/dkms/vboxhost/5.0.2/source ->
/...
3
votes
1
answer
3k
views
apt-get having dependency problems
I noticed the issue when I tried to upgrade Python, but it seems to be a problem for all apt-get commands.
When I do uname -a I get
Linux sarah-ThinkPad-X220 3.13.0-61-generic #100-Ubuntu SMP Wed ...
2
votes
2
answers
2k
views
Unable to install vmware workstation on ubuntu 15.04
When i install VMware workstation on my Ubuntu 15.04 with kernel updated from 3.19 to 4.2 . It shows below path
/tmp/vmware-root/vmware-modconfig-8097.log
Hence, i go to check the path and find ...
1
vote
0
answers
33
views
kernel building errors investigation
Tried to built kernel using this simple guide: https://wiki.ubuntu.com/Kernel/BuildYourOwnKernel
I've got only one "...all.deb" file instead of 3 files.
How can I track errors?
Are there any logs of ...
3
votes
0
answers
666
views
How do I sign my own kernel modules to avoid tainting the kernel?
I've made a kernel module, using this tutorial as an example. It works, but on loading I get a warning in kernel log:
gdt_get: module verification failed: signature and/or required key missing - ...
1
vote
1
answer
775
views
Need help! kernel compilation error!
https://www.youtube.com/watch?v=ekHpIfiUt8M i followed this guide, unfortunately TWICE got this error :
make[2]: Entering directory /home/dante/kernel/linux-4.2'
scripts/kconfig/conf --...
0
votes
1
answer
73
views
patching kernel (every update?)
I'm about to apply that famous patch that makes vgaarb see nvidia as a VGA device to the kernel.
But Linux releases a new kernel only every 2 month as I know. And Ubuntu kernel releases are even ...
4
votes
3
answers
8k
views
igb Detected Tx Unit Hang
Have a:
lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 14.04.3 LTS
Release: 14.04
Codename: trusty
with kenel 3.16.0-46-generic.
Today i do dist-upgrade and ...
1
vote
1
answer
496
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 ...
6
votes
4
answers
2k
views
Cannot delete old kernels
I ran the command:
dpkg -l | grep linux-image-
and got this list
rc linux-image-3.13.0-51-generic 3.13.0-51.84
rc linux-image-3.13.0-52-generic 3.13.0-52.86 rc linux-image-3.13.0-53-generic 3.13.0-...
0
votes
1
answer
200
views
Help applying touchpad fix to rc.local
I'm new to Ubuntu and trying to implement a permanent solution to my touchpad not working in Ubuntu 15.04. The solution I have so far only works until I restart/reboot so I've tried to add it to rc....
2
votes
0
answers
310
views
Bumblebeed and bbswitch error
I have a problem with my MSI-GS60 laptop under Ubunutu.
I explain:
First of all, with this laptop I had a wifi unrecognized issue. So I had found somes posts talk on that and I had finaly found a ...
4
votes
1
answer
1k
views
Keep old kernels
I am doing experiments with few Linux kernels, also I want to keep all the kernels on my system; I don't want then to be removed automatically. how do I achieve that?
(NOTE: I have mounted /boot on ...