Questions tagged [kernel]

The main component of most operating systems, the kernel manages most of a computer's communication between hardware and software. Typically, the kernel is the lowest level of abstraction a programmer can have to a resource.

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No Space Left Kernel Compile & Install Issue - Oracle Linux

I am getting this error every time when I start installing the kernel. [root@aaa linux-5.17.8]# sudo make install sh ./arch/x86/boot/install.sh 5.17.8 \ arch/x86/boot/bzImage System.map "/...
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Kernel lockdown disallows loading of an self-compiled and self-signed in-tree kernel module

I'm having difficulties loading a kernel module that I myself compiled and signed for Secure Boot. The module in question is ec_sys, located within drivers/acpi directory of the kernel tree. I'm using ...
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Ubuntu Blu-ray burner suddenly not detected - again

I'm using ImgBurn with wine to burn blu-ray folders. Now all of the sudden ImgBurn can't detect the drive anymore. I've experienced this before, 4 years ago. Back then the cause was a buggy new kernel,...
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Kali Linux getting stuck on

I've been trying for 2 days now, and Kali keeps giving me this while installing in VirtualBox. I've checked that my virtualisation is turned on and I've tried with 3 different Kali images, 2022.1, ...
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dmesg + what is the meaning of - tx_timeout and tx_timeout recovery

we have Hadoop cluster with data node machines - RHEL 7.2 on some machines we can see the messages as - tx_timeout and tx_timeout recovery the network configuration is with team not with bond ! [...
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how to identify DIMM card conflicts from kernel messages

we have RHEL 7 server , and from dmesg log we can see the following details [13901018.980859] {9}[Hardware Error]: Hardware error from APEI Generic Hardware Error Source: 4 [13901018.980868] {9}[...
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How is a batch file (`.cmd` / `.bat`) file executed on Windows?

Context On Windows, the application responsible for opening a given file type (identified by its extension) is resolved using file associations defined (among a few other places) in HKEY_CLASSES_ROOT. ...
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kernel parameter - net.core.netdev_max_backlog , what happened when its too low

we want to understand what are the aspects when net.core.netdev_max_backlog kernel value is very low and not as recommended on our Linux RHEL machines , the value for this parameter is 1000 since our ...
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what's root cause of "A start job is running for Create Volatile Files and Directories"

Stuck at "A start job is running for Create Volatile Files and Directories" after reboot a server(Debian 9.5, 64bit), and solve by this "boot-stuck-at-a-start-job-is-running-for-create-...
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Booting a custom Linux kernel from USB on Real Hardware?

I'm an absolute beginner to compiling Linux kernel. I followed this tutorial and I'm now left with a bzImage containing the Custom kernel and an initrd.img containing the root directory or at least ...
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Detect SCSI signals using netlink sockets

I'm trying to detect any SCSI signals sent from the kernel using netlink. Usually I would use udev hooks but I'm trying to detect the addition or removal of hard drives from a RAID controller and udev ...
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Detecting addition or removal of hard drives to RAID configuration

I need to be able to trigger a command to run whenever a hard drive is removed or inserted into a RAID configuration. To detect the removal or addition of hard drives I would usually use udevadm hooks ...
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Inconsistency with Ubuntu fanotify version

I am experimenting with using the fanotify api instead of inotify to watch filesystem changes. Rather than meddling with the feature set, I am trying to get it working for now. But encountered a big ...
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Ubuntu 18.04 stucks on under heavy i/o load

I got 2 node which connected to a shared storage(3Par) with FC. And I have 32 virtual volume exported to that nodes. I use this volumes(formatted as ocfs2) as minio backends. So lots of small files ...
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initrd /casper/initrd: verbose output

In my previous question: grub2: error: can't allocate initrd - chainload an NTFS partition from FAT32 without errors on initial ramdisk (initrd) file I posted the error output: error: can't ...
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Fix boot partition / kernels on Ubuntu

I am trying to help Ubuntu 18.04 server to fix the boot partition. My recipe for this server was to have unattended security updates on. This ensures in time that the boot partition will be full, ...
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Why cannot veth-pair I created ping through each other

I created veth pair ip link add veth0 type veth peer name veth1 ip addr add 1.2.3.101/24 dev veth0 ip addr add 1.2.3.102/24 dev veth1 ip link set veth0 up ip link set veth1 up 485: veth1@veth0: <...
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Kernel update leads to network loss - how to rebuild network module automatically?

I have a Ubuntu 20.xx system (Mint). Whenever the kernel gets updated, I have to rebuild the network driver manually by executing a script via sudo in order to be able to connect to the internet. The ...
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What is the Windows equivalent of the Linux kernel argument memtest? [duplicate]

Linux has a kernel argument memtest. This is documented as, Specifies the number of memtest passes to be performed. Each pass selects another test pattern from a given set of patterns. Memtest fills ...
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How can I update the kernel in WSL2 kernel to latest release?

The current kernel version in my WSL2 subsystem is: 5.10.60.1-microsoft-standard-WSL2 However, I see in the official Microsoft WSL GitHub repo there is a newer version of the kernel: linux-msft-wsl-5....
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Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000005

I'm pretty new to embedded linux and I would really appreciate a bit of help. I'm trying to run a linux kernel on the risc-v fpga. I built linux 5.0.0 with busybox initramfs and compiled with this ...
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Changing the default kernel does not change uname

I have a hetzner server, and I wanted to use wireguard on the server. As shown below, my wireguard module is only available for the kernel version "4.18.0-348.el8.x86_64". $ rpm -ql kmod-...
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Getting dependency problems prevent configuration of Linux headers after Linux kernel update

I am on Ubuntu 20.04 and this is the result that I get in the terminal dpkg: dependency problems prevent configuration of linux-headers-5.16.10-051610-generic: linux-headers-5.16.10-051610-generic ...
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Trouble building kernel module during nvidia-driver install

I am running Debian 10 with a kernel that I built from source. When I attempt to install nvidia-driver from buster-backports with "sudo apt -t buster-backports install nvidia-driver", it ...
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Broken Linux kernel, can't reinstall it

I got /boot/vmlinuz-linux not found while booting my Arch Linux. I know the kernel is damaged and I have to reinstall the kernel. But the problem is: I don't have ANY bootable devices, and also, I ...
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How to download and apply kernel patches

There are a number of websites sharing the same series of patches I want to apply this series of patches https://lore.kernel.org/all/20190807155524.5112-1-steve.capper@arm.com/ What I would do is to ...
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rtkit-daemon[1119]: The canary thread is apparently starving. Taking action

I am using Oracle Linux Server release 7.9, we have installed oracle 12c on this machine and running a consistent load. During the night time after running the test for more than 8-10 hours, suddenly ...
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device order through open-iscsi

I recently added a logical volume to an iSCSI target, which already had at least one volume, and which had a login from a Linux (Mint) host running Open-iSCSI. I then re-scanned the target on the host,...
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Kernel is not connecting at Jupyter notebook

I tried every possible answer I found on the internet, downgrading the notebook and tornado version using the Anaconda distribution and many more but none of them solved my problem. Here is the doc ...
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Is there a difference between SELinux behaviour between different kernel versions?

between kernel 3.x and 4.x, if SELinux is permissive, is it possible that a process doesn't have access to a particular file for one case and not for the other? Where can I read exact changelog?
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USB drive not responding to kernel

I have a USB device that when plugged into my computer produces the following dmesg output: [ 1561.678968] usb 4-2: new SuperSpeed Gen 1 USB device number 8 using xhci_hcd [ 1561.700583] usb 4-2: New ...
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How can I get my CPU to run at maximum speed by circumventing CPU scaling?

I am running CentOS 7 (7.9.2009) (kernel 3.10.0-1160.49.1.el7.x86_64) on a rather old laptop (Lenove T61) with a dual core CPU (Intel(R) Core(TM)2 Duo CPU T7300 @ 2.00GHz). The driver for CPU scaling ...
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Having a proxy machine with Windows KDNET kernel debugging?

I'm using KDNET to debug a Windows kernel driver on a second laptop via Ethernet cable. It works by directly plugging the Ethernet cable from the host to the target laptop. The process is described in ...
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Ubuntu wifi and docker can not work together

I have an ssd with dual boot: Windows 11 and Ubuntu 20.04. I have disable fast boot from Windows 11. With ubuntu, the wifi card (Intel AX201NGW) does not work with the 5.11.0.41 kernel. I have to ...
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Which package provides kmod-zstd on openSUSE 15.2?

I am running openSUSE 15.2, but with a newer stable kernel in order to have a driver for the RTL8125 network interface. Currently, I am on kernel-default-5.13.7-1.1.gb1bb2c4.x86_64 and I would like to ...
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Update Ubuntu kernel out of band?

I run Ubuntu 20.04 on my LG Gram 17 laptop. It's a great combination, with one exception: a kernel bug was introduced last year that causes a false over temp alarm that triggers an immediate shutdown ...
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I2C bus linux: Systems with more than 4 memory slots not supported yet, not instantiating SPD

Problem: I believe there are enough motherboards with 8 memory slots. I would like to see the contents of the SPD via decode-dimms, but there is only support for up to 4 slots ( inclusive) in the ...
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Any way to tweak Windows' kernels or drives to handle I/O and reduce or eliminate hangs with failing drives?

I frequently work with failing hard drives for data recovery and various tasks. These tasks are usually short lived in nature, but important. The way Windows seems to handle any failing drive that's ...
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After kernel update that begins with 5.14.15 (5.14.16 too) computer not booting (Fedora 35)

But my notebook after the same update is working. What to do? Maybe I should report an error in kernel, but I don't know where it is to do. My hardware: Motherboard – ASROCK A320M-HDV R4.0 CPU – AMD ...
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How to find out what a kworker does?

I have kworker processes, which regularly enters D state. My computer also becomes laggy, which I think may be due to D state kworkers. Usually, these processes run with a command similar to this: ...
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Pop!_OS : setting kernel parameters (boot loader options) permanently is not working

Was experimenting GPU passthrough with QEMU (following the steps given here) on Pop!_OS and in the process I added kernel parameters. Now I want to remove the intel_iommu=on kvm.ignore_msrs=1 vfio-pci....
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My Apple Macbook Pro (M1) keeps crashing. A glitchy pink screen appears, then it restarts. What is happening here?

I have provided the error log at the bottom. This is the 4th time this has happened to me. I am doing very light tasks like browsing and typing, when all of the sudden a glitchy pink screen appears ...
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How to disable the splash screen on single monitor,

my stack is: raspberrypi, uboot, buildroot and weston. I have two display devices connected to the board. First is the touchscreen for the user interface(HDMI-A-1), second is for the projector (HDMI-A-...
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How possible is it that LibreOffice could be causing a new kernel build of release candidate status to Freeze?

This is for kernel source version 5.15-rc2. I'm testing it for fun and would like a better understanding of how the following could happen. As a programmer and past troubleshooter my gut is telling me ...
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Poor NFS performance under high load

I have two Debian servers connected to a shared NFS server. Mounts: nfs.internal.com:/volume1/SHARE on /share type nfs (rw,nosuid,relatime,sync,vers=3,rsize=131072,wsize=131072,namlen=255,acregmin=0,...
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consoleblank kernel parameter doesn't work in ubuntu 20.04 LTS server

I just install Ubuntu 20.04 server on my laptop, and want to enable console blank to save power (by tuning off LCD screen backlight) as I will keep the old laptop as a 24x7 server. I used to apply ...
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Grub doesn't show xanmod kernel

I've installed the xanmod kernel (5.13) on my Ubuntu 20.04, but it's not showing up in grub menu. $ ls -la /boot total 374776 drwxr-xr-x 5 root root 4096 Sep 11 11:44 . drwxr-xr-x 20 root root ...
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Clonezilla won't boot on new Dell laptop 5420

Any ideas why Clonezilla won't boot from USB on a new Dell laptop 5420 (Intel Core i5)? I always end up with error messages like below. rcu: INFO: rcu_sched self-detected stall on CPU and watchdog: ...
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Kernel Timer Precision Test fails with Ubuntu 20.04 on my setup

There are several tests that asserts kernel timer precision in linux-test-project https://github.com/linux-test-project/ltp poll02 pselect01 pselect01_64 epoll_wait02 nanosleep01 select04 ...
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How Linux boot UP without /boot?

I have Centos VM on VMware Workstation. I commented the /boot entry in the /etc/fstab for testing purposes. But I found that the system gets boot UP with unmounted /boot file system. How the system ...
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