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.
3,468
questions with no upvoted or accepted answers
3
votes
0
answers
331
views
Super slow kernel startup
My Samsung series 5 notebook (i5, 500gb hdd, 4gb ram) has a super slow boot for Ubuntu 16.04.3 LTS (I have a dual boot Windows 10 - Ubuntu 16.04.3 LTS)
I write:
systemd-analyze
Output:
Startup ...
- 161
3
votes
1
answer
6k
views
installation error for brostrend ac3 wifi adapter
I am trying to install a brostrend ac3 1200 mbps wifi adapter on my desktop and keep running into problems during the installation. I am trying to install the drivers but they aren't available on ...
3
votes
0
answers
2k
views
unattended-upgrade stuck upgrading kernel
One of my ubuntu boxes seems to be stuck running unattended-upgrade..and its locking apt so I can't do anything else (also I don't think I should reboot it in this state)
root 20027 0.0 0.1 ...
- 141
3
votes
1
answer
396
views
looking for alternative for latest mainline stable kernel deb files to replace defunct kernel.ubuntu.com/~kernel-ppa/mainline/
Am trying to upgrade to 4.11 kernel, and would like to be able tp upgrade to every mainline stable kernel as I have before on the kernel.ubuntu.com/~kernel-ppa/mainline/ site. There are no clear ...
- 39
3
votes
0
answers
221
views
Keyboard buffer issue with multi-byte characters (latin, diacritics) / dead keys
I write in Spanish and sometimes I use diacritics (ie multi-byte chars) with dead keys, for example "liberación" ("liberation" in Spanish). Usually I don't have any problem, but ...
- 15.7k
3
votes
0
answers
173
views
Compile linux kernel module for Ubuntu Phone
I would like to test a little selfmade kernel module on my Ubuntu Phone.
Can anyone tell me, where i can get the kernel headers to compile?
Or is there something special to know for kernel modules on ...
- 183
3
votes
1
answer
5k
views
error booting ubuntu on chromebook:_XSERVTransmkdir: Owner of /tmp/.X11-unix should be set to root
Here is the whole error report. I already ran into trouble once and had to reinstall the Ubuntu croot.
Entering /mnt/stateful_partition/crouton/chroots/precise...
_XSERVTransmkdir: Owner of /tmp/....
- 31
3
votes
0
answers
459
views
Can't boot after an upgrade to 16.04.1. Kernel panic - not syncing: Attempted to kill init!
I had a 14.04 installation inside VirtualBox, and today I tried to update it to 16.04. It fails to boot after this. Selecting older kernel version from the boot menu and/or recovery mode doesn't help.
...
- 123
3
votes
0
answers
787
views
System freezing... No way of capturing the reason why?
I have a PC that has a number of peripherals connected to it that is intermittently experiencing a freeze of the OS. There are 6+ USB devices and four monitors connected to the PC.
Details of system:...
- 31
3
votes
0
answers
5k
views
Failed to find cpu0 device node at every boot
I am using Ubuntu 16.04 with Kernel 4.7 RC6 and at every boot I got the message: Failed to find cpu0 device node.
It is something to fix or is nothing important ?!
Can you help me ?!
Thanks in ...
- 51
3
votes
0
answers
1k
views
Ubuntu 16.04 constantly freezing leading to kernel panic
I had issues with my laptop constantly freezing. So I found a post where someone had suggested updating the kernel to remedy the issue. I followed the steps outlined here:
https://askubuntu.com/a/...
- 39
3
votes
0
answers
5k
views
Qualcomm Atheros AR93xx Wireless Network Adapter + Ubuntu 16.04 woes
NEWS:
Added update 1
Added update 2
I am trying to build a new machine using the Gigabyte GA-970 G1 Gaming motherboard, together with a TP-Link TL-WDN4800 N900 Wireless Dual Band PCI Express ...
- 1,667
3
votes
0
answers
756
views
Systemd Kernel Variables Error
At boot, I receive an error message [failed] failed to start apply Kernel variables. I have not used a Systemd distro until now so I'm not sure what I should be looking for.
I ran this in terminal ...
- 575
3
votes
0
answers
3k
views
Kernel Panic when setting up Ubuntu 16.04 with VirtualBox
FIRST NOTE: I tried the solution proposed by this topic, but it did not work. Besides, the fact that I've reinstalled Windows recently could (or could not) make my situation a little different.
Some ...
- 133
3
votes
0
answers
455
views
Kernel freeze on wake up 16.04
I've been using ubuntu for a couple of months now and after kernel 3.56, I started seeing a problem when I wake up my pc. Basically, the first few second everything is working fine and then mouse, ...
- 63
3
votes
1
answer
1k
views
14.04 update: kernel crypto interface not available
A few days ago, after a sytem update to kernel 3.19.0-56, I can not open anymore a tcrypt volume with cryptsetup. I get the following error:
sudo cryptsetup open --type tcrypt /dev/sda tcryptDisk
...
- 901
3
votes
1
answer
3k
views
Problem installing bbswitch on Ubuntu 14.04.3
I have an Nvidia Optimus graphic card installed and have the Nvidia driver installed and working for my Intel card, but I cannot switch to the Nvidia card. This is because bbswitch-dkms will not build ...
- 31
3
votes
1
answer
283
views
New kernel installed but loaded older kernel
I installed new kernel linux-image-3.8.0-44-generic and linux-image-3.13.0-73-generic manually and linux-image-3.2.0-96-generic by update. But grub still loads linux-image-3.2.0-89-generic. Grub ...
- 31
3
votes
0
answers
89
views
How to view signing algorithm of a loadable kernel module?
I am trying to read the signing algorithm(like SHA512) of a kernel module. I am using Ubuntu machine with Kernel (3.13.0-68-generic).
I tried using modinfo command, but it doesn't tell me the ...
- 31
3
votes
1
answer
259
views
Dell XPS 13: won't boot with newest kernel (cannot enter encryption password for ctyptsetup)
I am on Ubuntu 15.04.
I have a problem with the latest kernel, which got upgraded a few days ago. This kernel won't boot: 3.19.0-30-generic
Fortunately I have still the old 3.19.0-28-generic which ...
- 1,942
3
votes
0
answers
668
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 - ...
- 1,733
3
votes
0
answers
1k
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 ...
- 708
3
votes
0
answers
202
views
Why does 3rd digit in Ubuntu kernel version not match 3rd digit in its mainline upstream kernel version number?
From the Ubuntu Kernel FAQ ( https://wiki.ubuntu.com/Kernel/FAQ ) :
Given an Ubuntu kernel package version how do we find the release it
is from? The kernel package version is of the following ...
- 131
3
votes
1
answer
868
views
Virtualization limits for Ubuntu Server 14.04 LTS with KVM
Essentially I'm after something like this, but for Ubuntu Server 14.04 LTS.
I'm trying to create some KVM guests with very large 1TB+ RAM (through OpenStack Nova). I can boot the 1TB VM fine, but I ...
3
votes
0
answers
728
views
Slow boot on Ubuntu 15.04 during ACPI
The time seems to be wasted mainly between these two log lines. What could it be waiting for ?
Apr 30 01:19:22 terodde kernel: [ 0.907820] [Firmware Bug]: ACPI: BIOS _OSI(Linux) query honored via ...
- 141
3
votes
0
answers
884
views
Screen brightness issue Toshiba Portégé after 15.04 upgrade
I have a Toshiba Portégé Z30-A-13P.
I can no longer adjust my screen brightness after upgrading Ubuntu to version 15.04 (Kernel 3.19). The screen brightness (as well as the touch-pad) didn't work ...
- 141
3
votes
0
answers
1k
views
Dell e7440, sleep sometimes fails, kernel logs show ACPI errors
I have a new Dell Latitude E7440 with Ubuntu 14.04.2. Sometimes (but not always), after sleeping, I cannot resume, as after trying to resume one of the following happens:
I can move the mouse but ...
- 751
3
votes
1
answer
210
views
Ubuntu14.04LTS + VMware Workstation11 missing Linux-Header
I am running a VServer with Provider Strato.de from Germany... As it seem they are providing their VServer Plattforms out of Virtuozzo Containers.
My Server using Ubuntu 14.04 LTS 64 bit, access via ...
- 31
3
votes
0
answers
2k
views
Docker warning on cgroup swap limit, memory.use_hierarchy
I am getting this warning from 'sudo docker -d':
WARNING: Your kernel does not support cgroup swap limit.
even after following the steps (as in this link):
modify below lines in /etc/default/grub ...
- 31
3
votes
1
answer
2k
views
How to keep linux-cloud-tools-virtual in sync with my kernel?
The Ubuntu 14.04 package linux-cloud-tools-virtual, used for compatibility with Hyper-V, depends on linux-cloud-tools-3.13.0-44-generic. However, the standard installed kernel is 3.13.0-32, which ...
- 129
3
votes
0
answers
3k
views
udev and eMMC rpbm partitions
I'm running into this bug:
Fix udev rules to consider mmc rpmb partitions and trying to solve it using a udev rule. I haven't needed to learn anything about udev in the past, so have been reading up ...
- 1,564
3
votes
0
answers
1k
views
How do I load a module that has no signature in ubuntu 12.04?
I've got a custom module for a Mightex camera that has been tested for ubuntu 12.04 which I'm using.
I have installed it however something is not working. I think it has to do with this dmesg output:
...
- 745
3
votes
1
answer
7k
views
How do I fix this error? dkms.conf: Error! No 'BUILT_MODULE_NAME' directive specified for record #0 Error! Bad conf file
I am using Ubuntu 14.04.1 LTS
Does anyone know how to fix this dkms.conf error?
dkms.conf: Error! No 'BUILT_MODULE_NAME' directive specified for record #0.
Error! Bad conf file.
File:
does not ...
- 41
3
votes
0
answers
907
views
14.04 - USB microphone speaker device not working anymore
I own a PJP-20UR web conference microphone speaker, I have been using this USB device for ages with Linux, Windows, Mac never ever have had any issues with it.
Since I upgraded from Ubuntu 12.04/12....
user25165
3
votes
0
answers
963
views
Can't switch to Discrete GPU Hybrid Graphics ATI/intel
Just recently I had got my hybrid graphics working with DRI_PRIME=1. I obviously have the open source drivers. Now for some reason that I can't figure out it has stopped working.
xrandr --...
- 721
3
votes
0
answers
2k
views
How to make Huawei 4G module ME909u-521 work on Ubuntu?
I'm having some trouble having an Internet connection on 4G with Ubuntu (latest version, latest kernel).
I had no trouble making my Huawei E3276 LTE dongle work.
Now I'm trying to connect my ...
- 31
3
votes
0
answers
419
views
USB Keyboard/Mouse, Networking broken by kernel update
I recently (automatically) updated all the kernel-related packages (linux-image, linux-headers etc) to version 3.13.0-27.50. I'm using the generic kernel for AMD64.
After reboot I find that my USB ...
- 153
3
votes
0
answers
1k
views
Apple aluminium keyboard hub is supplied to little power
I have an Apple aluminium keyboard with an integrated hub.
On Mac OS X, I'm able to connect both my mouse and a USB pen drive while on Linux, the power limit is exceeded when connecting more than one ...
- 131
3
votes
1
answer
313
views
Get my app, having a kernel module, accepted by the review process of the Ubuntu Software Center
I have submitted an app divided in 3 parts:
A kernel module
A daemon
A control panel
The first and last parts are free and open source, and packaged in a PPA.
The second one is closed source, and ...
- 643
3
votes
1
answer
188
views
What will be the power backend for (K)Ubuntu 13.10?
I have Kubuntu 13.04 installed. KDE uses powerdevil to manage hibernate/sleep, which in turns seems to use pm-utils backend. pm-utils is unmaintained, and broken at this point1. For example, I had to ...
- 460
3
votes
0
answers
2k
views
13.04 No sound; sound applet shows Dummy Output
I upgraded to 13.04 and afterwards the sound wasn’t working. When I look in the sound applet the only device listed is Dummy Output. I have looked online and I tried a couple solutions with no luck. I ...
- 31
3
votes
1
answer
2k
views
How to Set a Value of Kconfig Option
I want to change the value of a specific CONFIG_... parameter (in here: CONFIG_ATH5K_DEBUG) inside Kconfig option.
I use make menuconfig command, press / and type CONFIG_... to find its location. ...
- 31
3
votes
1
answer
404
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 ...
- 39
3
votes
1
answer
2k
views
Customizing kernel and uname info
For practice I want ot build a custom kernel on my Ubuntu 16.04. I followed this guide:
https://wiki.ubuntu.com/Kernel/BuildYourOwnKernel
That went well, kernel builds and installs and boots fine. ...
- 81
3
votes
1
answer
522
views
Error while updating my system 16.04 LTS
When I am using following command to update my system, I got an error from dpkg,how to rectify that,
sudo apt-get update
sudo apt-get upgrade
sudo apt-get dist-upgrade
linux-signed-image-generic ...
- 31
3
votes
5
answers
12k
views
Wireless issues on 16.04 with RTL8821AE, ASUS E202S
I've recently purchased an Asus E202S desktop computer and tried to install Ubuntu 16.04 on it. I had no problems to install or make a dualboot with Windows 10, but the real problems started to show ...
2
votes
1
answer
846
views
CIFS on 22.04 LTS - has something changed between kernel 5.15.0-101-generic and 5.15.0-102-generic?
I have an Ubuntu 22.04 client connected via CIFS to an Ubuntu 22.04 server.
The mounts are done via an fstab entry similar to:
//machine.fqdn/sharename /mnt/some.directory cifs rw,credentials=/root/...
- 151
2
votes
0
answers
671
views
Boot issues due to missing NVIDIA driver after Kernel upgrade to 6.5.0-21 (from 5.15.0-91)
I am running Ubuntu Desktop 22.04 (upgraded a few months ago from 20.04) on a circa-2011 MacBook Pro. (CLARIFICATION: The problem seems unrelated to the upgrade from 20.04 to 22.04 ... I've been on ...
2
votes
1
answer
627
views
Kubuntu/Ubuntu/Fedora Stuck at install on HP Spectre x360 Meteor Lake Core Ultra 155H Laptop dual boot
I am a beginner at linux and trying to install it on a HP Spectre X360 laptop with Meteor Lake Core Ultra 155H with dual boot on a single 2TB NVME disk.
I am creating a separate /root partition, but ...
- 21
2
votes
3
answers
4k
views
Ubuntu 22.04.3 - VMware Kernel Module Updater
Ran into the GNU C Compiler (gcc) version 12.3.0 was not found.
I have seen this issue before and have resolved it, however when I run the commands below I still receive the request for GCC. Is the ...
- 21