kernel

Ubuntu Server 22.04.4 LTS on Raspberry Pi – How to downgrade the Kernel

Ubuntu Server 22.04.4 LTS on Raspberry Pi – How to downgrade the Kernel I am currently having trouble finding a tutorial on how to downgrade the kernel of Ubuntu Server 22.04.4 LTS on the Raspberry Pi. The currently installed kernel version is 5.15.0-1050-raspi. The Pi version of Ubuntu Server 22.04 LTS does not have GRUB …

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Boot a kernel of debian installer with expert mode

Boot a kernel of debian installer with expert mode I want to reinstall my VPS with the debian’s official repository, instead of with the image provided by the VPS operator(I don’t trust the VPS operator). On original system I installed debian-installer by apt install debian-installer debian-installer-12-netboot-amd64, and taked the kernel that comes with debian-installer as …

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Where is 512M RAM from?

Where is 512M RAM from? In Virtual machine, Kali, I assigned the memory 4G, like this; But there is a problem. I installed self-build kernel at the guest to hack the memory. # uname -a Linux 15ud490-gx76k 6.8.4+ #8 SMP PREEMPT_DYNAMIC Sat Apt 6 15:49:20 KST 2024 x86_64 x86_64 x86_64 GNU/Linux And I want to …

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TuneD can't verify profile cause of missing configuration(according to the internet)

TuneD can't verify profile cause of missing configuration(according to the internet) So I was crusing the Internet, trying to come up with a performant way of setting up KVM Windows Guest setup on my freshly installed Ubuntu 22.04 Host machine, I found this tutorial. This tutorial shows How Do I Properly Install KVM on Linux. …

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Does mmap() update the page table after every page fault?

Does mmap() update the page table after every page fault? Based on my research on mmap(), I understand that mmap uses demand paging to copy in data to the kernel page cache only when the virtual memory address is touched, through page fault. If we are reading files that are bigger than the page cache, …

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VMware vmmon & vmnet 17.5.1 and Linux kernel 6.8.0 won't compile

VMware vmmon & vmnet 17.5.1 and Linux kernel 6.8.0 won't compile After upgrading to kernel 6.8.0, VMware’s vmmon and vmnet couldn’t compile, giving the following error: … … /tmp/vmware-host-modules-w17.5.1/vmmon-only/common/task.c:548:1: warning: no previous prototype for ‘TaskGetFlatWriteableDataSegment’ [-Wmissing-prototypes] 548 | TaskGetFlatWriteableDataSegment(void) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ /tmp/vmware-host-modules-w17.5.1/vmmon-only/common/task.o: warning: objtool: .text: unexpected end of section CC [M] /tmp/vmware-host-modules-w17.5.1/vmmon-only/common/vmx86.o In file included …

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Ubuntu 20.04 : Unable to load the ‘nvidia-drm’ kernel

Ubuntu 20.04 : Unable to load the ‘nvidia-drm’ kernel I failed to install the Nvidia driver using NVIDIA-Linux-x86_64-535.154.05.run on my Ubuntu 20.04 system this morning. At the end of the installation, an error occurs: ERROR: Unable to load the ‘Nvidia-drm’ kernel module. I had installed the same NVIDIA driver before until I updated the Linux …

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How could March 30th 2024 be followed by the 1st?

How could March 30th 2024 be followed by the 1st? I am in the EU zone +1 or when DST is on, +2. Now is Sunday 31.3.2024. This Sunday morning, we changed into DST, at 2→3 (CET → CEST). I have Linux servers in separate networks reporting monthly energy consumption at 23:58 of the last …

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What does the "segfault at X" kernel log message mean if X is very large?

What does the "segfault at X" kernel log message mean if X is very large? I’ve got a device with bad RAM. Running memtest overnight shows all faulting addresses to be in the 0x7d0000000 – 0x7f0000000 range. I plan to replace the RAM, but until then, I’ve disabled a 2GB chunk around it with memmap=: …

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How does the Linux Kernel store hardware TX and RX filter modes?

How does the Linux Kernel store hardware TX and RX filter modes? I am working on a C program which gets the timestamping information for a given network interface, like my own version of ethtool. My goal is to get the information printed by $ ethtool -T myNetIf. Something like: Time stamping parameters for myNetIf: …

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Ubuntu 20.04 – Kernel Panic when installing AMD Drivers

Ubuntu 20.04 – Kernel Panic when installing AMD Drivers First post here, so be gentle… I’m installed Ubuntu 20.04 Desktop onto an old desktop turned mining rig. I managed to install Ubuntu onto the HDD currently in the system, and works seamlessly, until I get to the driver installation for my AMD cards. I have …

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Ubuntu 22 – Repeated wireless reset by kernel

Ubuntu 22 – Repeated wireless reset by kernel I have a baffling issue on a relatively fresh install of ubuntu 22.04. I noticed today that the internet was very slow on my laptop, but not on my phone or other laptops in the apartment. After some investigating, I noticed that any time the network connection …

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WiFi Issue: Terminal Freeze upon Turning Off WiFi

WiFi Issue: Terminal Freeze upon Turning Off WiFi Dear Ubuntu Community, I am encountering a persistent issue with my Ubuntu 23.10 system related to the WiFi functionality. While the WiFi connection itself works flawlessly, attempting to turn off the WiFi leads to the entire system freezing. Any commands involving sudo or NetworkManager result in the …

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Stuck with kernel 6.2.0 on Ubuntu 23.10

Stuck with kernel 6.2.0 on Ubuntu 23.10 I’m running Ubuntu on a thin client as a headless home server. I’ve upgraded to 23.10 a few monthes ago, but I realize I’ve been stuck with kernel 6.2.0 since then. Running sudo apt update, sudo apt upgrade or sudo apt dist-upgrade gets me nothing (everything seems to …

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E: Sub-process /usr/bin/dpkg returned an error code (1) when installing something on kubuntu

Intel ARC intel-i915-dkms dpkg error upgrading to HWE kernel 6.5 Whenever I try to install something, it returns this error: dpkg: dependency problems prevent configuration of linux-headers-generic: linux-headers-generic depends on linux-headers-6.5.0-17-generic; however: Package linux-headers-6.5.0-17-generic is not configured yet. dpkg: error processing package linux-headers-generic (–configure): dependency problems – leaving unconfigured Setting up libegl-mesa0:amd64 (24.1~git2402200600.41cd32~oibaf~m) … No …

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How often are the drivers updated on the GA linux-generic kernel?

How often are the drivers updated on the GA linux-generic kernel? I know that the drivers of the kernel HWE is update every six month with the release LTS. But I not find other info with the GA kernel. Know you this info? Thank you. Asked By: lamp || Source The HWE upgrades every six …

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Debian file corruption bug possible without reboot after unattended kernel update?

Debian file corruption bug possible without reboot after unattended kernel update? Today I learned that there had been a faulty Debian kernel version which caused ext4 data corruption (bug 1057843) in December 2023. Searching through the /var/log/aptitude and /var/log/apt logs, I noticed that the faulty kernel version was installed for one full day by /usr/bin/unattended-upgrade …

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Why don't devtmpfs populate /dev/pts?

Why don't devtmpfs populate /dev/pts? Linux automatically populates a devtmpfs with the right devices and directory structure. This provides an almost complete tree for /dev, but the pts devices are notably missing. For the pts devices, Linux provides another virtual filesystem named devpts. This however is also a collection of device nodes, sometimes causing surprises …

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ESP and GRUB instalation

ESP and GRUB instalation The aim is to install Debian using debootstrap. First I want to install all system on a small 32GB flash disk. And concepts of GPT partition tables and GRUB is quite clear: There is a table of partitions. Each partition has uniq ID. Further on each partition a filesystems created. FileSystem …

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CentOS 7.9 not reporting full version number after recompiling kernel

CentOS 7.9 not reporting full version number after recompiling kernel I needed to enable SCSI support in CentOS 7.9 so I followed the instructions here: https://wiki.centos.org/HowTos(2f)I_need_the_Kernel_Source.html to add SCSI support and recompile, which worked as expected, but instead of uname -r reporting 3.10.0-1160.108.1.el7.x86_64, it only reports 3.10.0, and the vmlinuz files it creates in /boot …

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