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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can a faulty hard disk make my CPU IDLE so low
we have couple RHEL servers ( RHEL version 7.2 ) with very low CPU idle as the following.
our suspicion is about the disks as for example sdk and sdc and that because we saw from dmesg errors as [sdk] ...
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mcopy says "Cannot initialize '::'" for no aparent reason [migrated]
I have this makefile:
ASM = nasm
.PHONY: floppyimage kernel bootloader everything
goldos: everything
qemu-system-i386 -fda build/goldos.img
norun: everything
everything: floppyimage kernel ...
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Using perf from a user account
I'm following admin-guide/perf-security.html from the kernel docs to set up perf with a user account. Briefly, I set up the capabilities on the binary and change group ownership to perf_users. However ...
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How to decrease VTIME value with termios api in Linux kernel
Related post closed with an open question. Why Windows is better than Linux for raw UART processing ?
https://stackoverflow.com/questions/76979323/how-to-reduce-tty-vtime-for-non-canonical-uart-on-...
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Rebuild and install RISC-V Kernel cross compile
Good day everyone
I have Debian12 Virtual Machine on the Host W10
I have SBC mango pi mq-pro with RISC-V, CPU Allwinner D1
On the SBC linux distro: ubuntu 5.17.0-1003-allwinner riscv64
This distro ...
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Understanding the Loading of Modules by initramfs in Linux: User Space or Kernel Space
I'm trying to gain a clearer understanding of the Linux boot process and the role of initramfs in loading kernel modules. Specifically, I'm interested in knowing whether the modules loaded by ...
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`IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready` message repeating every minute
I am using my Linux system for running some serverless functions using OpenFaaS.
I have placed the required invocation command in a shell script and I am constantly running the shell script using a ...
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linux + how to verify the dynamic ports allocation settings
How to know the range for the allocation of dynamic ports on red hat Linux machine
From Linux we did
sysctl -a | egrep "net.inet.ip.portrange.first|net.inet.ip.portrange.last"
but those ...
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Windows 10 RE - kernel is missing or contains errors
I was attempting to create a Veeam Recovery Media (a rescue disk for a backup app) today. Although it was created, it is unbootable, due to a problem with Windows RE, that is used to run this bootable ...
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Using ebtables with hostapd to block outbound access from an IoT network
I have a Raspberry Pi set up to control a number of local IoT devices, and needed them connected to the Internet to set them up initially, but want to prevent them from "phoning home" to a ...
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MSI Laptop wakes up immediately after entering sleep mode
Some time ago I posted on Fedora Discussion because my Fedora system (MSI Summit e16 flip running Fedora 38) started having problems with sleep mode after a kernel update (actually, starting from ...
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Receiving "E: Sub-process /usr/bin/dpkg returned an error code (1)" when performing the command: "sudo apt upgrade" on Kali Linux
When I run sudo apt upgrade or other related commands, I receive an error E: Sub-process /usr/bin/dpkg returned an error code (1). The full command being executed can be shown below:
sudo apt upgrade
...
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Docker networking issue - write unixgram ->: write: no buffer space available
I have an issue with running a docker build bake on a macos, but I think it's related to the OS and not to Docker.
During the execution of the build - I get a "Connection was reset" ...
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How to enable networking in vmware 17 player and debian 13 testing with kernel 6.3.0-1-amd64
I have installed "VMware-Player-Full-17.0.2-21581411.x86_64" on Debian 13 trixie (testing) with kernel "6.3.0-1-amd64" according https://wiki.debian.org/VMware#...
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Moved /usr to another disk as it was getting too big but now my system won't boot?
Currently I have my arch install (pure arch + hyprland) installed so that my / (root) is on my NVME SSD (which has little space due to windows dual boot) but my /home directory is on my SSHD (hybrid ...
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Nano edits to files revert after reboot every time
I am trying to get a settings on my kernel to save and after editing them they always flop back to the original settings after I restart, I write them out and save before exit.
sudo cpupower frequency-...
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Samba mounts hangs the system
I set up a cluster using pcs with 2 nodes + quorum
[root@konor2 etc]# pcs status
Cluster name: wildflycluster
Status of pacemakerd: 'Pacemaker is running' (last updated 2023-06-01 09:52:35 +02:00)
...
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Run older kernel on Ubuntu with secure boot
On Ubuntu 20.04, I am trying to run some piece of proprietary software junk that works only with kernel 5.8 instead of the current kernel 5.15.
So, I installed the kernel 5.8 using a mainline script ...
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How to override the BSOD behavior in Windows systems
Many times , when I was re-installing Windows in an old computer, I faced the famous BSOD and the system argues that it must shutdown to prevent "further harms" to the hardware : in my ...
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Linux - Disable Kernel USB Check at boot
I have the following problem:
The boot process of a PC is delayed by about 30 to 60 seconds because the kernel reports a defective USB cable.
After the boot process all USB devices work as usual. Even ...
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RHEL + how to capture fresh kernel message without machine reboot
here is example from dmesg output from important production server ( RHEL 7.2 - DELL machine HW )
as we can see the sde disk in server is dying
[Wed Jun 30 11:24:58 2021] sd 0:2:4:0: [sde] tag#0 ...
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Who is responsible for checking/ blocking a laptop from booting due to low battery? Motherboard's POST, bootloader or the kernel?
is it the motherboard's post that will prevent a critically low battery from continuing with booting up the OS?
is it the bootloader's responsibility? (e.x GRUB)
or is it the kernel who runs some ...
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RHEL server + what is the meaning of the kernel messages about Hung TX queue XX
We have 524 RHEL machines. in our Hadoop cluster ( all machines are DELL HW )
all machines are RHEL 7.2 version (old kernel version)
uname -r
3.10.0-327.el7.x86_64
last week we seen the following ...
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Why would my keyboard work after switching kernels back and forth?
I had a problem with my keyboard not working after updating my Arch Linux system. I tried rolling back the whole system to an earlier version of Arch from last year to no avail. Then another idea was ...
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udev parameter in efistub same thing as udev config file?
I want to increase the debugging level for udev at boot time. Can this be done by changing the parameter in the /etc/udev/udev.conf
Does rebuilding the initrd with mkinitcpio -p somehow embed this ...
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Booting from a persistent live usb on MX linux and enabling systemd?
I have created a Live USB with persistent storage using MX Linux since they offer a few tools which makes it easier.
After booting and installing a bunch of applications I was not able to enable the ...
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What's the cause of this silent LiveKernelEvent 193?
Brand new system, not OC'ed
Zotac 4070Ti Trinity
CPU i5-12600K
500GB Kingston SSD
Transcend 16GB RAM
Windows 11 Pro 22H2 Build 22621.1265
Coolermaster MWE 10050 Gold V2
All drivers and BIOS are up to ...
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Interpreting an ACPI error: No handler for Region
I started getting ACPI errors on my Ubuntu 22.10 system, which were not there before.
I saw them on mainline kernel 6.2.2 and Ubuntu kernel 5.19.0 too.
kernel: [ 132.228690] ACPI Error: No handler ...
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Arbitrary other processes hang when I "pause" one - how can I pause processes "better"/figure out how to un-deadlock?
Sometimes, I'm running massive compiles (and similar) on my machine, mostly unattended. Typically, those require intervention every now and then, and this intervention requires googling. So far so ...
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Fedora 37 VirtualBox Error "vboxdrv kernel module is not loaded" and "Kernel driver not installed (rc=-1908)"
(I already tried things from answers in similar questions to this one)
Fedora Linux 37 (Workstation Edition) x86_64, kernel: 6.0.7-301.fc37.x86_64
I installed VirtualBox with sudo dnf install ...
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qemu-system-x86_64: Failed to execute /init (error -8) - converting a docker image into a bootable ISO
I'm currently trying follow these steps to convert an instance of the busybox image into a bootable ISO. However, I seem to have reached a blocker at the "Now we can check if what we did so far ...
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Disable autoremove of old kernel versions on Fedora 37
Somewhy i can't boot on kernel version higher than 6.0.7-301 (more here).
Recently Fedora automatically downloaded kernel 6.1.10, and after a few days 6.1.11. Both of them, as i said, i can't use for ...
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How to remove a start up BIOS message that comes with pc
I got my pc from my job (education) and the first thing it shows when starting up is a white text message on a black screen "Ministry of Education" .
how do i remove it from my laptop ? it ...
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Fedora 37 Infinite boot on kernel 6.1.9-200 (and higher)
Fedora Linux 37 (Workstation Edition) x86_64
GNOME 43.2
Kernel: 6.1.7-200.fc37.x86_64
After selecting kernel 6.1.9 while boot (which is chosen by default) I'm having infinite black screen with ...
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Where can I download specific kernel versions for Debian 11?
I'd like to download a specific kernel version to compile on a virtual machine but I can't find a place to download it. I’d like to find this version 4.19.249-2 for Debian 11 do you know where I could ...
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Is this DMA protection in Group Policy different from Kernel DMA protection?
There is a Bitlocker DMA protection and then there is Kernel DMA protection. the latter is better and enabled by default on capable hardware, the former is only suggested to be used when hardware ...
user1752038
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How to install kernel 4.8 in RHEL?
I am using RHEL vm provided by aws. I want to downgrade kernel 4.8 to for research purposes. Is there any way to do that? The result of uname -r is
5.14.0-162.12.1.el9_1.x86_64
i tried converting to ...
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How to update OpenWrt to kernel 5.10.165 if I have already manually updated the kernel to 5.10.162?
I use OpenWrt and I applied a patch about kernel update, 5.10.162 but now in the master, they updated to .165. But they were at .161, so now they did .161 to .165 so when I try to update my build I ...
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Unable to inject errors with Einj (mce-test, ras-tools)
I want to inject memory errors on my system to check whether RAS/EDAC system really works and logs errors on my memory (during boot or any runtime). I came across with many tools but I don't know ...
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Can we ditch the Linux initial ramdisk if we don't use loadable modules?
I'd like to boot an embedded machine without using a ramdisk image. I understand one of the reasons for the ramdisk is so it can load the filesystem module needed for accessing the root partition (to ...
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Signals vs. polling for I/O (uses very simple example of I/O)
I understand how hardware interrupts work. I have a basic question about I/O, and will use keyboard and characters from key presses as the context for the question.
In a general sense, do processes ...
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How does the Windows kernel LFH work?
I'm trying to understand Windows kernel Segment Heap. I found this article: https://www.sstic.org/media/SSTIC2020/SSTIC-actes/pool_overflow_exploitation_since_windows_10_19h1/SSTIC2020-Article-...
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Unable to manualy compile kernel 6.1.2 kali
I'm trying to manually compile the linux 6.1.2 from source code to get the latest kernel revision. I actually have Kali 2022.4 whit the 6.0 Kernel. I'm using this website step
I just did a fresh kali ...
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Linux: top not showing/counting all tasks
Running top I see the total tasks being about 81 (line 2):
top - 21:16:18 up 23 days, 1:47, 2 users, load average: 0.06, 0.03, 0.01
Tasks: 81 total, 1 running, 55 sleeping, 0 stopped, 0 ...
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Unable to see CPU temps for new AMD Ryzen 7700x
I have the following problem with a new PC.
Linux Mint was installed on a PC (data see code block), but I can not display the CPU temperature in any way.
╭─user@machine03153 ~
╰─$ sudo inxi -Fxz ...
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How does the application permission system work on macOS?
How does the permission system work?
Usually, when an app tries to do something, e.g access the camera or the microphone, it has to ask the OS, which then asks the user.
And also, if an app tries to ...
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Linker warnings with new Linux kernel
Thanks for the pointer to the right spot on the mailing list!
CALL scripts/checksyscalls.sh
CALL scripts/atomic/check-atomics.sh
DESCEND objtool
CHK include/generated/compile.h
LD ...
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Gentoo kernel panic on hyper-v
I recently installed gentoo. I followed the guide for amd64 installation. I double-checked if the /boot was mounted before I installed the bootloader (GRUB). I chose the GPT+UEFI option for partition ...
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How can I install Kernel 5.17 on CentOS 7?
On a CentOS 7.9 installation I have some troubles running newer CPUs, e.g Ryzen 5 5600G (with included graphics).
I concluded that it is the Kernel because it boots with certain versions, with kernel ...
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AMD Ryzen 5 5600G not working on CentOS 7
I have a CentOS 7 install and I moved the disk to a computer with newer processor, the CPU is AMD Ryzen 5 5600G (with included graphics).
When I try to boot (this disk or a fresh USB install disk with ...
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