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.

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How to upgrade JUST the kernel? [duplicate]

I am trying to upgrade my kernel, but I would like to avoid updating all of the packages that a sudo apt-get dist-upgrade causes. I am running Ubuntu 14.04, if that matters. Is there a way to only ...
Anthony Hilyard's user avatar
12 votes
2 answers
6k views

What is kernel configuration?

Running PowerTOP on an Ubuntu 10.10 system, one of the suggestions are Enable the CONFIG_PM_ADVANCED_DEBUG kernel configuration option. This option will allow PowerTOP to collect runtime ...
j-g-faustus's user avatar
  • 5,538
12 votes
3 answers
11k views

Can I switch to HWE kernel after installation?

I'm going to install Xenial Xerus, but I'm not sure which variant I should use. I get to choose between the normal kernel and HWE kernel. Now I understand that HWE kernel means that support for new ...
skyking's user avatar
  • 393
12 votes
6 answers
50k views

VMWare can't find linux headers path

I'm using ubuntu 12.10 with the kernel 3.7.0-7 from xorg-edgers fresh X crack. Now when I try to launch wmware workstation it asks for linux header path like shown here. I tried all the solutions on ...
Alexis's user avatar
  • 255
12 votes
2 answers
22k views

What are the limitations of the Windows Subsystem for Linux? [duplicate]

I played around with the WSL last year, but at the time it was not capable of running the neural network project that I wanted to try on it. Apparently had something to do with it having an outdated ...
Aslan French's user avatar
11 votes
3 answers
77k views

Kernel panics with "Cannot open root device" error, where do I append the "root=" option?

whenever I try to boot with linux kernel 3.0.0.13 (the one installed by the upgrades) I get a Kernel Panic error: VFS: Cannot open root device "sda1" or unknown block (0,0) Please append a ...
lucacerone's user avatar
  • 1,690
11 votes
1 answer
47k views

WARNING: amdgpu dkms failed for running kernel (on both 16.04 & 18.04)

Since last 4 days, I am trying to install amdgpu pro drivers on my ubuntu system and I am getting error. I have downloaded drivers from here for Rx580. I am following installation instructions from ...
Anand Suthar's user avatar
11 votes
3 answers
8k views

Will the Intel Bay Trail CPU problem be fixed in 17.04?

Many people have problems with Ubuntu 14.04, 16.04 and 16.10 where the system freezes completely, and I am one of them. I want to know whether Ubuntu 17.04 will fix that issue or not, whether it has ...
Bassem's user avatar
  • 512
11 votes
3 answers
4k views

Snap packages support for Ubuntu 14.04 LTS?

I am running Ubuntu 14.04 LTS on an Atom Z3735f system. I'm stuck with 14.04 because I have a custom kernel with patches in order to be able to have audio and WiFi support for this system, so I ...
luca76's user avatar
  • 215
11 votes
1 answer
2k views

Does Ubuntu update kernels upgraded by ukuu?

After I upgrade the kernel with ukuu, will Ubuntu be able to update the kernel without using ukuu? I wish to know if we have to continue to use ukuu to update kernels upgraded by ukuu, or if Ubuntu ...
NicolasSmith's user avatar
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10 votes
2 answers
3k views

How to replace ubuntu 20.04 kernel with clearlinux kernel?

https://github.com/clearlinux-pkgs/linux https://aur.archlinux.org/packages/linux-clear/ How to use clearlinux kernel for ubuntu? Hoping for a step-by-step copy/paste guide to replace ubuntu kernel ...
nazar2sfive's user avatar
  • 1,335
10 votes
2 answers
2k views

Has 3.19.0-65 introduced new Secure Boot requirements to 14.04 LTS?

My laptop came with 14.04 (Trusty Tahr) LTS. Since then, I have made no significant changes, and I have been applying updates whenever I was notified of them. On 2016-07-15, I was applying updates ...
Peter Ford's user avatar
10 votes
3 answers
5k views

What's the minimal compatible Linux kernel version required to run Ubuntu?

Why older kernel? For whatever reason out there, you might be forced to run another kernel than the ones provided by Ubuntu. It may even take you back a few years for a kernel that is compatible with ...
gertvdijk's user avatar
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10 votes
2 answers
11k views

Ubuntu 16.04 kworker using high CPU constantly

On Ubuntu 16.04 computer I saw kworker take up 80% of a CPU, consistently. I generated a perf report: sudo apt-get install linux-tools-common linux-tools-$(uname -r) Record some 10 seconds of ...
sunapi386's user avatar
  • 210
10 votes
1 answer
10k views

How to **really** suppress kernel messages during boot?

I have Ubuntu Server 18.04 LTS. I want to suppress kernel messages shown on console during boot. (The type of [0.1234] kernel message thing that floods the screen ). THIS DID NOT WORK: Changing /etc/...
Sergiy Kolodyazhnyy's user avatar
10 votes
2 answers
10k views

Using quad core, but only 1 CPU entry in `/proc/cpuinfo`? Is SMP running on my computer?

I just upgraded my system and did a clean install of Ubuntu when I did (Installed Oneiric Ocelot from the CD last week but yesterday upgraded to 12.04 LTS). I have an i7 920 (quad core with ...
Ari B. Friedman's user avatar
10 votes
1 answer
12k views

What's the best way to update the linux kernel if I have no internet connection?

I currently did a clean install of Ubuntu LTS 10.04 on my new laptop. After the installation, I attempted to do an update of the system only to find out that the 2 most important interfaces (eth0 and ...
baktin's user avatar
  • 1,165
10 votes
5 answers
11k views

/usr/src is eating up all inodes

It seems /usr/src (apparently old kernels) used up all my inodes: Filesystem Inodes IUsed IFree IUse% Mounted on /dev/sda4 489600 489600 0 100% / devtmpfs ...
klingone's user avatar
  • 101
9 votes
3 answers
24k views

For a 32-bit kernel, what are the pros/cons of PAE vs. non-PAE?

I am using Ubuntu 12.04 32-bit. My kernels are PAE kernels. I know these are the kernels we can use for 32-bit OS which have 4 GB RAM, to utilize all 4GB of RAM. My system is a 32-bit system. So I ...
Raja G's user avatar
  • 102k
9 votes
2 answers
31k views

How Can I Roll Back a Kernel Update?

An update for Ubuntu was available today and it installed the generic kernel 2.6.38.11.26. After doing so networking is no longer functioning correctly. My Acer Aspire 4520 has an Nvidia Network card ...
Michael Haney's user avatar
9 votes
3 answers
3k views

Kernel patch that solves battery issues when for ubuntu ? [closed]

http://www.phoronix.com/scan.php?page=news_item&px=MTAxNDM When will this come for ubuntu ? I am getting tired with my 11.10 dieing at little over 50 minutes of battery when at the most extreme ...
Lucas Kauffman's user avatar
9 votes
2 answers
26k views

DisplayLink USB 3.0 Not working on Ubuntu 14.04LTS

I noticed this might be yet another DisplayLink outcry - but I thought I give it a go anyway. So the usual story - I have got a DisplayLink adaptor Kensington USB3.0 Video Adapter, and doesn't look ...
Bitmap's user avatar
  • 319
9 votes
3 answers
15k views

"Failed to build vmnet" for kernel 3.19

Because this answer is only for kernel 3.13, so I'd like to share a solution for the problem Failed to build vmnet for kernel 3.19 and earlier versions. Thus this is not my actual problem and is only ...
frogatto's user avatar
  • 904
8 votes
1 answer
46k views

Make boot partition using GParted in Boot-Repair [closed]

How do I create a BIOS boot partition with GParted? I am using Boot-Repair.
Gan's user avatar
  • 101
8 votes
2 answers
41k views

What are Kernel Version number components (w.x.yy-zzz) called? [duplicate]

When looking at kernel version numbers installed in /boot using a work in progress command (find /boot/vm* -printf "%A@ %p\n") I see: 1469098968.0000000000 /boot/vmlinuz-3.13.0-92-generic 1477523408....
WinEunuuchs2Unix's user avatar
8 votes
3 answers
4k views

Where / which is the actual kernel source?

I am following this to learn to compile the kernel. I used apt-get source linux-image-$(uname -r) to download the source code of the Linux kernel I am curretly using. After running the above ...
sps's user avatar
  • 437
8 votes
3 answers
3k views

Stop apt-get autoremove from removing old kernel?

I like managing kernels my self, and I can't figure how to stop apt-get autoremove from deleting older kernels.
dbz2k's user avatar
  • 105
7 votes
3 answers
10k views

mokutil - failing for almost all options

In the past I've successfully created a certificate and signed the virtualbox kernel modules for use. Now, other than --sb-state, all other parameters I try when running mokutil fail miserably. ...
user821263's user avatar
7 votes
1 answer
729 views

What's the best way to report a kernel panic bug

Suppose I have a machine that has no serial port and under certain reproducible situations will kernel panic. Assume I have tested the mainline kernel from the kernel team PPA and know this is an '...
popey's user avatar
  • 23.6k
7 votes
1 answer
19k views

r8168/r8169 - which one should I use?

I found a lot of answers like "you need r8168" or "you need r8169", but no explanation. I understood that it depends on the linux kernel, but I didn't find any list of kernels ...
Pavel V.'s user avatar
  • 256
7 votes
1 answer
10k views

ACPI : EC: Fail in evaluating the _REG object of EC device. Broken bios is suspected

I can't install linux with kernel over than 4.x on my computer. (MSI GP72-6QE-087XFR Leopard Pro) Tried : Ubuntu 15.10, debian 8 and linux mint 17.3. This is saying: "ACPI : EC: Fail in evaluating ...
Yohan Sanchez's user avatar
7 votes
3 answers
31k views

ACPI BIOS Error (bug): Could not resolve symbol [\_SB.PCI0.GP17.VGA.LCD._BCM.AFN7]

The fault: ACPI: Video Device [VGA1] (multi-head: yes rom: no post: no) ACPI BIOS Error (bug): Could not resolve symbol [\_SB.PCI0.GP17.VGA.LCD._BCM.AFN7], AE_NOT_FOUND (20190816/psargs-330) ...
Christian Völkel's user avatar
7 votes
10 answers
41k views

Nvidia driver not working on Ubuntu 22.04

My Ubuntu 22.04 updated this morning (after I use a standard script using the apt command and some other stuffs to clean my home directory) and the Nvidia driver does not work anymore. I have noticed ...
Philippe Gaucher's user avatar
7 votes
3 answers
5k views

How do you remove old kernels from the 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 ...
JamesH's user avatar
  • 192
7 votes
3 answers
8k views

Ubuntu 18.04.1 kernel upgrade stuck at setting up linux-headers-4.15.0-36-generic

I am trying to upgrade kernel on my laptop and as I'm doing that very often I never had an issue until last time when I was able to fix the issue with running: sudo dpkg --configure --pending As ...
Filip C.'s user avatar
  • 106
7 votes
3 answers
11k views

Virtualbox not working after Ubuntu 17.10 upgrade

After upgrading from 17.04 to 17.10 my VirtualBox wont start: $ VBoxManage --version WARNING: The vboxdrv kernel module is not loaded. Either there is no module available for the current ...
Tom Smith's user avatar
  • 231
7 votes
4 answers
6k views

How to automatically update burg after a kernel update

After every kernel update I have to run update-burg manually. How do I make it automatic?
jumbli's user avatar
  • 749
7 votes
1 answer
9k views

Nvidia drivers don't work with mainline kernel

I want to try some of the new features in the btrfs filesystem, and to do that I need to use a newer kernel than is included in Ubuntu 12.04. To do that, I have installed linux-headers-3.4.0-030400_3....
dutchie's user avatar
  • 669
7 votes
6 answers
70k views

Installing Ubuntu on Surface pro 4

I have moved from win 10 to Ubuntu 16.04. I've tried following this article and this video, but still run into problems as the latest kernel version is 4.6.3. I'm still running on the kernel that ...
Amir's user avatar
  • 133
7 votes
2 answers
2k views

Ubuntu 22.04: crazy kernel updates

today I booted my Ubuntu 22.04 as usual and Software Updates Tool asked me to install/update very old kernels. Also, it installed the 6.1.0-oem. Why? Edit for GUIVERC Into APT logs (/var/log/apt/*-gz)...
Paolo Palleschi's user avatar
7 votes
3 answers
33k views

ACPI Error: AE_NOT_FOUND when booting after upgrading from 20.04 to 22.04

I upgraded my Ubuntu version from 20.04 to 22.04 (dual boot), and now I get ACPI errors when I boot, but when I load an older kernel version (5.13.0-48-generic), so I only get this errors with the 5....
David's user avatar
  • 71
7 votes
2 answers
30k views

Is there unused `initrd.img` to remove?

Looks like I have a unnecessary initrd.img in my /boot directory: $ ls -1s /boot total 82835 1439 abi-4.11.0-10-generic 204 config-4.11.0-10-generic 1 extlinux 1 grub 48186 initrd.img-4....
Loom's user avatar
  • 576
6 votes
1 answer
8k views

Where do I get the AppArmor 2.4 compatibility patch?

I just compiled the 2.6.39-rc1 kernel and AppArmor complains about a missing /sys interface (plus, it slows down the boot). Where do I get the AppArmor 2.4 compatibility patch AppArmor asks for?
htorque's user avatar
  • 64.8k
6 votes
2 answers
27k views

Kernel panic on boot up with 13.10 live-USB [closed]

I am a new user for Ubuntu. I downloaded 13.10 yesterday and made a bootable USB with universal USB installer on my Lenovo IdeaPad Z580 laptop which is now using UEFI; everything appeared OK. When I ...
Muhammad Emad's user avatar
6 votes
2 answers
26k views

Module wl not found [ubuntu 16.04.1]

There is no wireless connectivity in ubuntu 16.04.1 here is more information I already tried this one, which suggested downloading the deb file and manually installing the broadcom-wireless driver ...
DarthRhaego's user avatar
6 votes
2 answers
13k views

How to switch between low latency and generic kernels?

I have installed a low latency kernel to help Ardour's performance while recording audio. On boot-up, it appears I can select which 'version' of Ubuntu I want; the two choices are 'Ubuntu' and 'Ubuntu ...
Cameron Sima's user avatar
6 votes
1 answer
27k views

How to update kernel to specific version

I would like to upgrade to specific kernel version (5.4.0-81-generic) from following current state on different servers. I would like to use apt package manger to update kernel. Ubuntu 18.04.3 LTS 4....
unknown's user avatar
  • 99
6 votes
3 answers
17k views

How do I restore an accidentally deleted initrd image?

I accidentally deleted the initrd image on my system. How do I restore it?
Binoy Babu's user avatar
6 votes
2 answers
13k views

Ubuntu 16.04.1 usbserial missing

What is the deal with usbserial kernel module in current Ubuntu version? I cannot install any drivers, which depend on usbserial.ko. How I got to this: When I connect CP2102 Virtual COM Port (VCP) ...
Karolis Milieška's user avatar
6 votes
2 answers
8k views

How do I install kernel 5.15.7=> on Ubuntu 21.10 Impish Indri?

I'm using Ubuntu 21.10 impish indri. For some specific hardware support, I'm advised to upgrade to kernel 5.16 (mainline). I tried manually installing the .deb files and installing them using dpkg -i. ...
Error404's user avatar
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