Questions tagged [kernel]

Questions concerning the Linux kernel in Ubuntu. Issues may including upgrading and installing kernels, compiling, patches, and kernel modules.

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What causes btrfs to be loaded at boot-time?

On my machine, I noticed in dmesg, that it runs benchmarks during boot time: [53263.092443] raid6: avx2x4 gen() 31855 MB/s [53263.160430] raid6: avx2x4 xor() 9347 MB/s [53263.228450] raid6: ...
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Ubuntu 20.04 LTS or Ubuntu 21.04

I'm a newbie software developer. Which version would you recommend for home-use? What I wish to use with the computer is learn tools such as Android Studio or Php. However the hardware changes and ...
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Ubuntu 20.04.2 LTS does not boot after HDMI connection

I have an ASUS VivoBook using a NVIDIA geforce graphics. I have had this problem several times, but always managed to fix it by rolling back software updates or using older kernels. Currently using ...
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it is possible to activate the tux text based logo in Ubuntu 21.04

the truth is that I get bored not having a logo during startup and yes, I don't mean Plymouth I mean the tux text based logo in addition to customizing the logo I already tried to activate it from ...
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rmmod: ERROR: Module vfio_pci is builtin

I'm close to completing my definitive guide to pass through an nvidia device by loading and unloading the driver and it's dependencies such as vfio-pci from / to the vm and viceversa. I'm a step away ...
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Nfs-kernel-server restart error ubuntu

I have encountered an error when I restart the nfs-kernel-server. This is what I have in my /etc/exports file: # /mnt/data/export 192.168.5.134(rw,sync,no_subtree_check) # /home 192.168.5.134(rw,sync,...
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Problem when compiling linux using sudo make

I have a serious problem when compiling linux when putting sudo make, I get this quite unknown error that I could not find in Google pikachuandeevee2000@Ubuntu-PC:/usr/src/linux-headers-5.11.0-17# ...
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Kernel update leads to “Loading initial ramdisk” on boot

To try out kernel development, I tried installing a new version of the kernel (specifically tried version 5.10.36). I followed the instructions on this website, namely Downloaded the tarball with the ...
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Update ubuntu and my kernel update to 5.8

Upgrade 20.04.01 to 20.04.02, I start a call (google-meet, zoom, microsoft teams), I can not do anything behind because it is very slow, another case, I start youtube or twitch in google chrome, I ...
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Keep linux-modules-extra updated without installing linux-firmware

I am running Ubuntu 20.10 in a VMWare Workstation virtual machine. I switched from linux-image-generic to linux-image-virtual so I could remove linux-firmware which is both quite large, and ...
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Ubuntu 20.04 setting PREEMPT_RT - Loading initial ramdisk

I am trying to update the kernel of Ubuntu from 5.8.0-50-generic to 5.9.1-rt20 (because there was no patches for 5.8.*, not sure why), but the system freezes after Loading initial ramdisk. Same thing ...
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Ubuntu network interfaces

So on my laptop I have two interfaces enp1s0 and wlp2s0 and if I want to use either one of them I have to run ifconfig x down on the other. For example if I don't do that to enp1s0, it shows that I'm ...
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Is it necessary to install new kernel in order to add a system call in ubuntu?

I recently installed newer version of kernel 5.8.1 and added a system call and it worked successfully. Now I need to add another system call, so is it necessary to install newer version of kernel in ...
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Hardware error: CPU, TSC, Processor

Just installed ubuntu 20.04 on a brand new cpu that I had built myself and when I thought I could finally enjoy the OS I got: [Hardware Error]: CPU 0: Machine Check: 0 ... [Hardware Error]: TSC 0 ADDR ...
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Slow boot on version 20.10 after installing xanmod kernel

I tried disabling the network manager service with no luck. It takes over a minute a half to boot. Here is the output from systemd-analyze critical-chain graphical.target @1min 35.521s └─multi-user....
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The “six” package is install but get an error “Could not find suitable distribution for Requirement.parse('six>=1.9')”

I am running a Yocto build and sometime during the build, I see the following error Processing dependencies for protobuf==3.3.0 Searching for six>=1.9 Reading https://pypi.python.org/simple/six/ ...
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How to fix warning '/boot/efi` is full

Since recently I get confronted straight after boot with a message saying that the partition /boot/efi is full. Which files in below list can i safely remove, leaving the system in a properly working ...
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Boot logs? Where can I look to figure out why my system will boot dual monitors with an OEM kernel but not any others?

Related to this topic: Why aren't the stock and mainline kernels supporting Intel onboard graphics when the 20.04b kernel does? Z590 motherboard 11th gen i9 11900k My new 11th gen i9 will boot to ...
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Help! Ubuntu 20.04 Server is printing kernel messages to my console

after setting up a fresh install of Ubuntu 20.04 server, exactly every 5 minutes and 11 seconds my console shows the following message, which is printed above everything on the screen: Message from ...
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How to enable offline cpu in qemu?

I am using qemu to run ubuntu16. I met offline cpu. I want to enable it. However, /sys/devices/system/cpu/cpu0 is not found. How to enable it? Thanks very much. ~$lscpu Architecture: x86_64 ...
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20.04: Boot hangs after kernel upgrade

A while ago I upgraded the kernel on a 20.04.2 test-server VM (on Hyper-V 2019) to 5.4.0-72-generic. Yesterday I noticed that the previous boot hang right at the start with the message "EFI stub: ...
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Unable to boot Raspbian on QEMU

recently I have a problem emulating Raspbian on QEMU for a school project. The teacher provides me a guide, but when I start the qemu emulation appear this error and the emulation stopped. This is the ...
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how to Clean Install rtl8821ce-5.5.2.1 package

serpent@kjkszpj:~$ sudo apt full-upgrade Reading package lists... Done Building dependency tree Reading state information... Done Calculating upgrade... Done 0 upgraded, 0 newly installed, 0 to ...
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Compaq laptop keyboard not working

I installed ubuntu 20.04 on my laptop few days before, which had windows 8. While installing i was using external keyboard ,but now my inbuilt keyboard is not working ,even lights on capslock button ...
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Kernel patching prompts “Reversed (or previously applied) patch detected! Assume -R? [n]”

I am trying kernel patching for the first time. I am not sure the following is encountered with an error and if I am doing it correctly. But in all tutorials and videos shows, .patch extension files, ...
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Intel® W480E chipset support

Please, has anybody tried Ubuntu 18.04 LTS or 20.04 LTS on this chipset? I have no possibility to try it now but I have to do an binding order as soon as possible. Older industrial motherboards are ...
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Upgrade of kernel is automatic?

It happens to have some issue and found a suggestion of type "upgrade the kernel solve the problem" So, I can just wait and do regular upgrades and kernel will upgrade to latest version or I ...
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How to get out of this kernel panic? (End Kerbal panic - not syncing)

First of all I was formating a USB so I can put a windows 10 ISO on it. But I got a few dpkg errors when is as trying to install woeusb, now I boot to this. First I see it saying the EFI failed to ...
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Why does Terminal say 'Kernel: (unsupported)' when I update?

I had to update the next kernel because livepatch was coming up with a lot of bug messages and most of the solutions I found said I had to update the kernel. I am running Ubuntu 20.04. The livepatch ...
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Why aren't the stock and mainline kernels supporting Intel onboard graphics when the 20.04b kernel does? Z590 motherboard 11th gen i9 11900k

EDIT: Problem with display has been narrowed down to dual montitors. System will only boot into both monitors on the OEM kernel listed below. For ALL other kernels, including 5.12.2, and the latest ...
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Screen Hangs or flickers violently when playing x264 videos on vlc. i915 [drm] GPU HANG in syslog

When playing videos 720p.WEB.H264 on VLC the screen starts flickering sometimes. And playback just shows 2-3 frames shuffling. Sound keeps coming normally. The icons on ubuntu sidebar also get ...
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How can I disable hwe-support on ubuntu 18.04?

The OS is Ubuntu 18.04.5 I want to use GA kernel. SO I do these operations: it@it51:~$ sudo apt install linux-generic Then reboot the machine. I uninstall HWE kernel: it@it51:~$ sudo apt-get purge ...
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Why Kernel does not upgrade despite enable HWE on Raspberry Pi 4?

I have installed Ubuntu Server 20.04 (64bit) on Raspberry Pi 4 almost a years ago. Then I have installed a update to 20.04.2 and enable HWE. But it does not upgrade kernel to 5.8. I have no idea why ...
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1answer
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Difference between linux-image-5.11.0-16-generic & linux-image-generic-hwe-20.04?

These two packages look exactly the same. What's the difference and why install one instead of the other ? linux-image-5.11.0-16-generic linux-image-generic-hwe-20.04
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ACPI Error: Needed type [Reference], found [Package] 0000000027f1cd97 (20200528/exresop-66)

[ 1489.465625] ACPI Error: Needed type [Reference], found [Package] 0000000038987839 (20200528/exresop-66) [ 1489.465633] ACPI Error: AE_AML_OPERAND_TYPE, While resolving operands for [Notify] (...
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Instaling linux-oem-20.04b kernel in Ubuntu 21.04

The problem: Intel audio hardware used in the Dell XPS 17 is not supported by kernel 5.11 in 21.04. Solution: Canonical has solved the problem for the LTS release & I have found a way to install ...
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How do you extract a driver from say an OEM kernel and compile it into a mainline kernel? 11th gen Intel issues

I have an Asus Z590 ROG Strix Gaming motherboard and i9-11900k. The motherboard has display port and hdmi to use the CPU's onboard graphics. Currently only the linux-oem-20.04b kernel will make the ...
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3answers
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mainline kernel now depends on libc6 2.33, non-installable in focal?

I've been happily installing 5.10 mainline kernels (from https://kernel.ubuntu.com/~kernel-ppa/mainline/) on my Ubuntu 20.04. Trying to update to 5.10.33, I discovered an unwelcome dependency on libc &...
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Ubuntu 20.04 32 bit [closed]

What I am asking today is if it is possible to generate a 32 bit version of Ubuntu 20.04. Is there a group or community working on a such project?
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Wickr Me doesn't launch on Ubuntu 20.04

Installed Wickr Me via the regular software center (so, as a snap). It's the latest version as listed on their website (5.77.12). After installing it, when clicking on the app, it doesn't launch. It ...
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1answer
55 views

ERROR: whitelist file not found While Compiling Linux Kernel

I am trying to compile the latest kernel linux-5.12 on my ubuntu 20.04.1. I have installed the necessary dependencies sudo apt install build-essential rsync gcc bc bison libssl-dev libncurses5-dev ...
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Does Ubuntu 16.04 server supports kernel version 5.4?

Is there any recommended kernel version to use for ubuntu 16.04 server? Does it supports latest kernel version 5.4? will it cause any issue?
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Qemu/KVM Postcopy migration fails in hirsute / v5.11 kernels (solved)

postcopy migration isn't the default but can in some cases be very useful With Ubuntu 21.04 Hirsute kernel being v5.11 postcopy migration will fail like: virsh migrate --unsafe --live --postcopy --...
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i9-11900k video working, cpu governor goofy, Z590 motherboard Ubuntu 20.04 oem kernel

After solving my graphics issue with help from here: Blank (no signal) display on new ASUS Z590 motherboard And helping someone else out here: UnclaImed display in ubuntu 21.04 with Rocket Lake I have ...
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82 views

How to update my just my kernel version on Ubuntu 20.04?

I have ubuntu 20.04 on my laptop. And I want to have an LTS version as there is some software that I need that works well only on that release. But also I would like to have a newer kernel, as my ...
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Ubuntu Studio randomly Freezes [20.04 , 20.10]

I'm having a recurrent problem with Ubuntu Studio since 20.04 (now 20.10). The system randomly freezes (maybe after weeks, maybe a couple times per day). Sometimes it's due to overheat, that happened ...
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50 views

What is the proper way to select a new version of the kernel and boot into it in Ubuntu for Raspberry Pi?

I know that in Ubuntu the regular way of selecting the kernel version to boot can be done through grub. How do I do this in Ubuntu for Raspberry pi? I guess it is using uboot, should I configure it ...
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1answer
68 views

How to rename a kernel file

I'm running Kubuntu 20.04 and my Bluetooth connection isn't working. I've learned from several posts that a necessary part of the remedy is to rename the kernel file BCM4356A2-13d3-3485.hcd to ...
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Laptop won't boot anymore after uninstalling Firefox (Ubuntu Mate 20.04)

thanks for reading and giving support. This will be hard. I've a laptop, Lenovo IdeaPad 100 15YIB , with originally only Windows 10 Home as OS. I've succesfully installed Ubuntu Mate 20.04 LTS a few ...
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how can i Activation selinux?

i use uname -r to know the version of the kernel and this is the result 5.8.0-50-generic and try to know some information about SELinux by this command grep -i SELinux /boot/config-5.8.0- and this is ...

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