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.
8,454
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Grub menu advanced options entries are cut off
My default Kernel is not working anymore with my graphic hardware. But I can succeed with an older Kernel from advanced options. Unfortunately the entries for older Kernels all look the same, so I ...
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Kernel panic - not syncing: VFS unable to mount root fs on unknown-block(0,0)
I'm experiencing a critical issue with my Ubuntu system and need some assistance. When I attempt to boot my system, I'm confronted with the following error message:
Potential solution attempted:
I've ...
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why try_attach every list entry in __register_sysctl_paths of sysctl.c#kernel code
i am reading the sysctl code about linux kernel 3.3.8
in function __register_sysctl_paths of sysctl.c
why call try_attach on every entry of the list,
what is the meaning of 'improvement' on "/* ...
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1
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Switching generic kernel to server kernel
I am setting up an ubuntu server with nginx. It will be load balancer and reverse proxy.
As far as I understand my ubuntu distrubition is Server.
in var/log/installer/media-info result;
Ubuntu-Server ...
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25
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debian/rules hook to incrementally compile kernel after changing source?
I want to make changes to an (in-built) driver in the Ubuntu kernel. But when I make changes to the source file, fakeroot debian/rules binary does not detect the change or recompile the file.
Is ...
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Ubuntu 20.04.6 (kernel 5.4.0) - Wi-Fi Driver Intel AX211
Looking for guidance/documentation I can follow, to get wifi firmware/drivers built/backported and installed for my older kernel version.
Trying to get a very new card:
Internal Wi-Fi Antenna Intel Wi-...
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I am following a video on setting up KVM. On the setting up of tuned, I am having a problem with missing parameters. How can I correct these errors?
In setting up Qemu and KVM: I received the following notification. I have seen several others with this same problem, but I have not been able to find a post with a resolution to implement.
$ sudo ...
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Mouse cursor weird after apt update. Wayland
Ubuntu Noble. All was fine until today, after apt update cursor starts lagging, but if you press the left mouse key on desktop, it fixes until you stop holding it. Also Mozilla got something weird ...
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after upgrading to 24.04, can't upgrade secure boot enforcement policy due to unsigned kerkels
I upgraded my system 23.10 to 24.04
however, it still shows me kernel kernel 6.8 can't be used
these below many screen shots for this issue
while now my system is 24.04
but on old kernel
How to allow ...
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+100
How to modify the kernel on modern (22.04) ubuntu systems
I am in a situation where it would be helpful to modify some of the core kernel drivers for testing/debugging, but I can't find a good guide on how to make and test the change safely on a system I ...
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Locating cause of soft lockups on Ubuntu on Azure
Kernel version: 6.5.0-1022-azure
For a couple of months I've been experiencing occasional issues with Ubuntu instances going into soft lockup, and I'm looking to find the cause.
I have 8 Virtual ...
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Intel ubuntu 22.04 server for intel skylake
Does ubuntu 22.04 server (kernel 5.15)support Intel® HD Graphics 530 of intel skylake?
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I installed Ubuntu 24.04 with the 6.8.0.35-generic kernel and the BusyBox message appears
I do not know what to do. When I enter with kernel 6.5.0.41 it normally enters the initial screen. What went wrong?
System Details Report
Report details
Date generated: ...
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Issue with nvidia drivers & with dpkg
I am trying to run the software MinKnow on my Linux device (ubuntu 22.04). This is a GUI based program for DNA sequence analysis, and is giving an error "Post-run basecalling is currently ...
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How to install CH340 driver in VirtualBox Ubuntu 22.04?
I have downloaded the Zip file from producer's website and extracted it in Ubuntu directory, when I run "make", it was prompted:
make -C /lib/modules/6.5.0-41-generic/build M=/home/mq/8051/...
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System locks up trying to install latest kernel
During the update, my system was completely locked up.
linux-image-6.5.0-41-generic/jammy-updates,jammy-security,now 6.5.0-41.41~22.04.2 amd64 [installed,automatic]
I have tried to recover, but the ...
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How to load efifb when no PCI monitor attached?
I have an Ubuntu 22.04 server box running on a AMD Ryzen 3 3200G with Radeon Vega Graphics GPU. I boot the server with the nomodeset kernel boot option to avoid a blank screen and to avoid the system ...
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Unable to update kernel on Ubuntu 22.04 due to cpio write error, but /boot is not full
NEW INFO 6/13/24 16:18 MT: after main post
Having problems with apt upgrade on my main workstation, been troubleshooting for months and I can't figure this out. Kernel will not update. Need the ...
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No USB devices detected on 22.04
I have a desktop computer with GL852G USB controller. When I run Windows 7 the USB ports are working OK. When I run Ubuntu none of my USB sticks are detected. Here is the output:
$ lsb_release -a
No ...
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virual box e security booot
A me da questo errore quando avvio la macchina virtuale su elementary os 7: Kernel driver not installed (rc=-1908)
The VirtualBox Linux kernel driver is either not loaded or not set up correctly. ...
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I am trying to load the kernel and display the messages from kernel when it is loaded successfully
My bootloader is loading the kernel successfully, but it is not displaying the messages from the kernel.
boot.asm snippet, when input is given 1 or 2, boot_mode is selected.
check_input:
inc dh
...
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Wifi and bluetooth stopped working after attempting mouse lag fix
I attempted to fix a bluetooth mouse lag issue with fixes shown in this link:
Lag when using Bluetooth Mouse, and I ran these commands:
echo "options iwlwifi bt_coex_active=0" | sudo tee /...
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43
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Ubuntu 22.04 : Laptop crashes after sleep, Lenovo P51
I have recently upgraded my laptop (Lenovo ThinkPad P51) to Ubuntu 22.04.
Everything seems to be working correctly except the sleeping/waking up. Triggered by closing and re-opening the lid.
I read ...
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Building kernel deb files with modified version number
I need to build a kernel with an additional patch on a driver. I was following the Build You Own kernel list using the apt version as I want to have in the end .deb packages I can install (an later ...
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After installing latest updates on Ubuntu Studio 22.04 LTS (kernel 5.15.0-110) the amdgpu driver crashes at boot
Running Ubuntu Studio 22.04 LTS on an Acer Aspire 5 laptop. Yesterday several updates were installed including Linux kernel 5.15.0.110. When I rebooted after the install the system wouldn't boot, or a ...
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Setting kernel parameters through snap
I wanted to try setting a kernel parameter as a workaround for a display problem. It seems snap now handles this. So I tried this:
$ sudo snap set system system.kernel.cmdline-append="...
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Modules disappear after reboot
Dear friends something really strange is happening in my system. The ip_tables module did not seem to be installed so I proceeded to reinstall the kernel and all modules:
sudo apt-get install linux-...
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rtl8812au-dkms Error during upgrade Ubuntu 24.04
How to solve this problem?
When I wright this command "sudo apt-get upgrade" to upgrade the app. the following error is shown up in the end of the result:
Setting up rtl8812au-dkms (4.3.8....
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Ubuntu Touch - USB serial kernel module for Xiaomi Redmi Note 9 Pro (Global)
I plan on purchasing a Xiaomi Redmi Note 9 Pro (Global) phone and then flashing Ubuntu Touch onto it and then use it as a daily driver. Here is the kernel source code for it.
I tinker with Arduino, so ...
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No such directory lib/modules
I am a very, very beginner. I wanted to test my Linux module in qemu: I cloned a repository with the required kernel, built it with standard configurations, launched qemu with the required kernel, but ...
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1
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Ubuntu 24.04 not booting on MacBook 4.1
I did an in place upgrade from Ubuntu 23.10 to 24.04 on my MacBook 4.1.
If I try to boot the default kernel 6.8.0.35, it won't boot I just get a black screen with a single hyphen in the top left. It ...
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135
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apt update unable to connect after kernel upgrade
Ubuntu 24.04 (upgraded from a long sequence of earlier releases). I recently updated from 6.8.0-31-generic kernel to 6.8.0-35-generic. After restarting the system, apt update could no longer connect ...
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802.11n USB wifi adapter (LM Technologies LM816-0648-3 Realtek 00E04C0001) crashes system
I have a desktop running Ubuntu Studio 22.04.1 LTS with kernel 6.2.0-1018-lowlatency,
with a LM Technologies LM816-0648-3 Realtek 00E04C0001 802.11n NIC USB wifi adapter.
Wifi use locks the system (...
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How to check a kworker workqueue
after upgrading from Ubuntu 18.04 to 22.04 I noticed that the performance of my SSD has decreased when testing fio workloads.
Comparing both versions with perf record I noticed a kworker in 22.04 that ...
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144
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NVIDIA drivers do not communicate with NVIDIA GPU
I have a 22.04.4 LTS running on an HPE DL380Gen10 server with NVIDIA A100. The GPU (with NVIDIA driver v515) was working fine till two weeks ago.
Last week, I found out that the
nvidia-smi
command ...
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Updates have broken my USB DAC
Unexpected Xubuntu updates have broken my USB DAC for music playing. The DAC works with one computer having (usname-r) kernel 6.5.0-28_generic. I have two others with kernel 6.5.0-35 which report in ...
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Mismatch complier with kernel
While I was trying to install Virtual Box's Guest Additions, my Ubuntu's screen has been glitching, so I got 2 things to solve, but to no avail.
I read and applied from 3 "askubuntu" posts, ...
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Ubuntu 22.04 randomly hangs for ~1-5 seconds
I've been experiencing a frustrating issue with my Ubuntu 22.04 system where it randomly hangs or freezes for about 1 to 5 seconds. This happens intermittently and without any clear pattern, making it ...
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2
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261
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Booting 24.04 from USB with UEFI fails with: "Initramfs unpacking failed" and "Kernel panic"
I am currently running Ubuntu 20.04 on my UEFI Bios PC in dual boot with Windows. Everything works fine. Since the support for Ubuntu 20.04 is almost at the end of its life, I wanted to replace it ...
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Ubuntu 24.04 Kernel Choice
I recently updated from 23.04 to 24.04. The update completed normally but the system froze on the reboot.
I noticed that I have two kernels installed.
6.8.0-31 will not boot
6.5.0-35 boots and runs ...
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Clarification on Kernel Version Choices for Ubuntu 24.04 LTS
Hello Ubuntu community,
I've been looking into the kernel version for Ubuntu 24.04 LTS and found some conflicting information that has left me a bit confused. According to kernel.org, version 6.6.32 ...
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How to make a given kernel line default on Ubuntu 20.04?
I have two kernel "flavors" installed on my Ubuntu 20.04 system: linux-generic and linux-generic-hwe-20.04.
$ dpkg -l | grep linux-generic | grep '^ii'
ii linux-generic ...
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linux kernel gives problem when booting
I have an issue with the linux kernel of my laptop. If I switch on the computer, when it arrives to the user screen, after 1-2 seconds before I could enter the password, the screen becomes fully black....
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Kernel 5.15 working but 5.8 does not?
I recently got Ubuntu dual boot.
Reasons being i want to try the fragattack:
https://github.com/vanhoefm/fragattacks?tab=readme-ov-file
In the documentation kernel 5.8 is supported and not later ...
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1
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55
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When I try to install Ubuntu I face some error
I am using a Lenovo ThinkPad 310 core i3 7th gen. When I tried to install Ubuntu this error showed up. I tried to enable sgx, but I couldn't find the option. Can anyone help me here how to fix this ...
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How to find out, whether Macros are defined or not?
In the Linux kernel source code I often see preprocessor directives like:
#ifdef CONFIG_RETHUNK
In general, how can I know, whether these Macros have been defined or not? Because it influences the ...
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Lost blktrace's events in Ubuntu 22.04
I used blktrace and fio to trace the I/O events of the NVMe SSD in Ubuntu 22.04. However, I only got Q events in my report.
Here are my experimental steps:
1.Open blktrace to monitor /dev/nvme0n1.
...
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174
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Cannot find "syscall_32.tbl" even though kernel source is installed
OS:
lsb_release: Ubuntu 20.04.6 LTS
uname -r: 5.15.0-97-generic
I have a camera connected to a USB network adapter via an Ethernet cable, which in turn is connected to a Linux machine via USB.
I'm ...
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36
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Can't control my fans in Ubuntu. Sensors detect says there is no driver for ITE IT8731F
Is there a way i can find a driver for this Super IO sensor? Can i use a driver made for another ITE chip that will be compatible with this one?
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How to find retpoline return thunk for my machine
I'm interested in finding out, how jump2ret works as a mitigation for retbleed. For that I would like to copy the return thunk to a kernel module such that I can play around with it (i.e. write the ...
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