# Changing kernel guide **URL:** \ **Category:** Kernel, boot, graphics & hardware\ **Created:** [March 10, 2023, 9:24am UTC](https://forum.endeavouros.com/t/changing-kernel-guide/38245 "2023-03-10T09:24:46Z")\ **Posts on this page:** 15\ **Page:** 1
**Author:** ![Flusso\_Canalizzatore](https://forum.endeavouros.com/user_avatar/forum.endeavouros.com/flusso_canalizzatore/32/77995_2.png) [@Flusso\_Canalizzatore](https://forum.endeavouros.com/u/Flusso_Canalizzatore)\ **Post date:** [March 10, 2023, 9:24am UTC](https://forum.endeavouros.com/t/changing-kernel-guide/38245/1 "2023-03-10T09:24:46Z")
Personally, I would find quite necessary a little guide for installing/change kernel. I tried months ago but I switched a lot of time from the arch wiki to other sites to understand how get the packaging of a custom kernel. What gave me problems was the creation of the initramfs, so, I was stucked into this passage because it raised me an error. As an ignorant, I suggest to get a little wiki on the endeavourOS site. In my personal case, I need to install a real-time kernel (yes, I already tried to install it from the AUR repo but it takes too much time to compile it) for audio recording experiments, but I noticed that is faster to download a kernel and patching it. The problem is how to make it start for booting. It could be interesting for everybody, but this is only a personal suggestion/opinion. ---
**Author:** ![xircon](https://forum.endeavouros.com/user_avatar/forum.endeavouros.com/xircon/32/9124_2.png) [@xircon](https://forum.endeavouros.com/u/xircon)\ **Post date:** [March 10, 2023, 9:46am UTC](https://forum.endeavouros.com/t/changing-kernel-guide/38245/2 "2023-03-10T09:46:12Z")
Which kernel? linux-rt is available in extra? ---
**Author:** ![s4ndm4n](https://forum.endeavouros.com/user_avatar/forum.endeavouros.com/s4ndm4n/32/70472_2.png) [@s4ndm4n](https://forum.endeavouros.com/u/s4ndm4n)\ **Post date:** [March 10, 2023, 2:49pm UTC](https://forum.endeavouros.com/t/changing-kernel-guide/38245/3 "2023-03-10T14:49:32Z")
Well, you can use our very own `akm` tool. ![image](https://forum.endeavouros.com/uploads/default/original/3X/d/7/d7312e0a18240fec22f1d52e5c9679a5e45563fa.png) Using this you can install almost all the kernels in the Arch repo. To boot from the kernel you can use [this](https://discovery.endeavouros.com/installation/systemd-boot/2022/12/). If you’re using `systemd-boot`. If you’re using `GRUB` then you have to edit `/etc/default/grub`. Use `sudo nano /etc/default/grub` and change `GRUB_DEFAULT=0` to `GRUB_DEFAULT="1>2"` So if the `linux-rt` is the first in the sub-menu it’ll make it boot. If you want more clarification on this use [this](https://superuser.com/questions/1358080/what-does-grub-default-12-mean) post in StackExchange. Or you can just replace the number in front of `GRUB_DEFAULT=` and see what works (I can’t remember how to find the correct number). After editing the `GRUB` config you need to recreate the actual `grub.cfg` file to do this you just have to run `sudo dracut-rebuild`. Now reboot to test. EDIT: Remembered how to find the kernel ID. - To find `$menuentry_id_option` use: ```auto $ sudo grep submenu /boot/grub/grub.cfg submenu 'Advanced options for Debian GNU/Linux' $menuentry_id_option 'gnulinux-advanced-38ea4a12-6cfe-4ed9-a8b5-036295e62ffc' { ``` - To find `$menuentry_id_option` for the ernel you want to use: ```auto menuentry 'EndeavourOS, on linux-lts' --class endeavouros --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-linux-lts-advanced-f2f94842-8952-4808-9752-1a9608e5af53' { menuentry 'EndeavourOS, on linux-lts (fallback initramfs)' --class endeavouros --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-linux-lts-fallback-f2f94842-8952-4808-9752-1a9608e5af53' { menuentry 'EndeavourOS, on linux' --class endeavouros --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-linux-advanced-f2f94842-8952-4808-9752-1a9608e5af53' { menuentry 'EndeavourOS, on linux (fallback initramfs)' --class endeavouros --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-linux-fallback-f2f94842-8952-4808-9752-1a9608e5af53' { ``` Above 4 entries are numbered 0, 1, 2, and 3. So when you are counting you should count it like below. ```auto 0 ---- menuentry 'EndeavourOS, on linux-lts' --class endeavouros --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-linux-lts-advanced-f2f94842-8952-4808-9752-1a9608e5af53' { 1 ---- menuentry 'EndeavourOS, on linux-lts (fallback initramfs)' --class endeavouros --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-linux-lts-fallback-f2f94842-8952-4808-9752-1a9608e5af53' { 2 ---- menuentry 'EndeavourOS, on linux' --class endeavouros --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-linux-advanced-f2f94842-8952-4808-9752-1a9608e5af53' { 3 ---- menuentry 'EndeavourOS, on linux (fallback initramfs)' --class endeavouros --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-linux-fallback-f2f94842-8952-4808-9752-1a9608e5af53' { ``` From the list, you can just select the one you want to use and then change `GRUB_DEFAULT=` to the number. If you want to use the normal kernel from the above list then change `GRUB_DEFAULT=0` to `GRUB_DEFAULT=2`. Save the file and then `sudo dracut-rebuild`. Then reboot and use `uname -a` to double-check what kernel you have been booted into. ---
**Author:** ![Flusso\_Canalizzatore](https://forum.endeavouros.com/user_avatar/forum.endeavouros.com/flusso_canalizzatore/32/77995_2.png) [@Flusso\_Canalizzatore](https://forum.endeavouros.com/u/Flusso_Canalizzatore)\ **Post date:** [March 13, 2023, 11:17am UTC](https://forum.endeavouros.com/t/changing-kernel-guide/38245/4 "2023-03-13T11:17:11Z")
I already installed akm, but I missed the passages that you had explained because the problem described in the post above (initramfs cannot be created… so, no grub config). Anyway, I will try again. Thanks for your post. ---
**Author:** ![s4ndm4n](https://forum.endeavouros.com/user_avatar/forum.endeavouros.com/s4ndm4n/32/70472_2.png) [@s4ndm4n](https://forum.endeavouros.com/u/s4ndm4n)\ **Post date:** [March 13, 2023, 1:48pm UTC](https://forum.endeavouros.com/t/changing-kernel-guide/38245/5 "2023-03-13T13:48:09Z")
You can also use `sudo grub-mkconfig -o /boot/grub/grub.cfg` to generate the `.cfg` file. But only if you have **GRUB** installed. ---
**Author:** ![manuel](https://forum.endeavouros.com/user_avatar/forum.endeavouros.com/manuel/32/396_2.png) [@manuel](https://forum.endeavouros.com/u/manuel)\ **Post date:** [March 13, 2023, 3:43pm UTC](https://forum.endeavouros.com/t/changing-kernel-guide/38245/6 "2023-03-13T15:43:25Z")
Creating initramfs when using grub: ```auto sudo mkinitcpio -P ``` About grub menus: you can write grub menu entries into file `/etc/grub/custom.cfg` with which you can experiment a bit. To write that file, you can copy a **menuentry** from the existing `/boot/grub/grub.cfg` and change some obvious details. And you do _not_ have to run `grub-mkconfig` to make it work! Simply reboot and test if your definitions work. If not, boot with a working entry and make the required changes to custom.cfg. ---
**Author:** ![Tenerlet](https://forum.endeavouros.com/letter_avatar_proxy/v4/letter/t/8edcca/32.png) [@Tenerlet](https://forum.endeavouros.com/u/Tenerlet)\ **Post date:** [March 13, 2023, 4:48pm UTC](https://forum.endeavouros.com/t/changing-kernel-guide/38245/7 "2023-03-13T16:48:32Z")
Really wish we had this tool/option during the EndeavourOS install. ---
**Author:** ![s4ndm4n](https://forum.endeavouros.com/user_avatar/forum.endeavouros.com/s4ndm4n/32/70472_2.png) [@s4ndm4n](https://forum.endeavouros.com/u/s4ndm4n)\ **Post date:** [March 13, 2023, 5:41pm UTC](https://forum.endeavouros.com/t/changing-kernel-guide/38245/8 "2023-03-13T17:41:29Z")
You can change these if you used the online installer. If you used the offline one then it’s more of a standard install. ---
**Author:** ![Brtza](https://forum.endeavouros.com/user_avatar/forum.endeavouros.com/brtza/32/86831_2.png) [@Brtza](https://forum.endeavouros.com/u/Brtza)\ **Post date:** [August 3, 2023, 7:03pm UTC](https://forum.endeavouros.com/t/changing-kernel-guide/38245/9 "2023-08-03T19:03:18Z")
What are the commands to install/ remove specific kernel ? On Akm you can install only latest kernel plus lts ---
**Author:** ![manuel](https://forum.endeavouros.com/user_avatar/forum.endeavouros.com/manuel/32/396_2.png) [@manuel](https://forum.endeavouros.com/u/manuel)\ **Post date:** [August 3, 2023, 8:29pm UTC](https://forum.endeavouros.com/t/changing-kernel-guide/38245/10 "2023-08-03T20:29:36Z")
If you mean downgrading, the command is ```auto downgrade ``` Otherwise normal pacman commands like ```auto sudo pacman -S -headers # install sudo pacman -R # remove ``` ---
**Author:** ![milkytwix](https://forum.endeavouros.com/user_avatar/forum.endeavouros.com/milkytwix/32/84303_2.png) [@milkytwix](https://forum.endeavouros.com/u/milkytwix)\ **Post date:** [March 29, 2024, 11:09am UTC](https://forum.endeavouros.com/t/changing-kernel-guide/38245/14 "2024-03-29T11:09:29Z")
Sorry to necro this thread, I found it via a quick search in the forums and it fits perfectly to my current situation. TLDR: Booting into linux after changing from linux-lts to linux does not work as expected. I had LTS with headers installed as only Kernel and wanted to revert back to non-LTS, but keep the LTS ones. So I fired up eos’ own AKM, installed core/linux and core/linux-headers alongside the LTS ones: ![image](https://forum.endeavouros.com/uploads/default/original/3X/4/e/4e2130fc19848f25ebccc14474ba39cd3c627dcf.png) and checked my config in /boot/grub/grub.cfg: ```auto submenu 'Advanced options for EndeavourOS Linux' $menuentry_id_option 'gnulinux-advanced-178ba18b-3faa-4b38-b7e5-5b0f5d2f285c' { menuentry 'EndeavourOS Linux, with Linux linux-lts' --class endeavouros --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-linux-lts-advanced-178ba18b-3faa-4b38-b7e5-5b0f5d2f285c' { load_video set gfxpayload=keep insmod gzio insmod part_gpt insmod part_gpt insmod btrfs if [x$feature_platform_search_hint = xy]; then search --no-floppy --fs-uuid --set=root 178ba18b-3faa-4b38-b7e5-5b0f5d2f285c else search --no-floppy --fs-uuid --set=root 178ba18b-3faa-4b38-b7e5-5b0f5d2f285c fi echo 'Loading Linux linux-lts ...' linux /@/boot/vmlinuz-linux-lts root=UUID=178ba18b-3faa-4b38-b7e5-5b0f5d2f285c rw rootflags=subvol=@ nowatchdog nvme_load=YES loglevel=3 zswap.enabled=0 amd-pstate=active echo 'Loading initial ramdisk ...' initrd /@/boot/amd-ucode.img /@/boot/initramfs-linux-lts.img } menuentry 'EndeavourOS Linux, with Linux linux-lts (fallback initramfs)' --class endeavouros --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-linux-lts-fallback-178ba18b-3faa-4b38-b7e5-5b0f5d2f285c' { load_video set gfxpayload=keep insmod gzio insmod part_gpt insmod part_gpt insmod btrfs if [x$feature_platform_search_hint = xy]; then search --no-floppy --fs-uuid --set=root 178ba18b-3faa-4b38-b7e5-5b0f5d2f285c else search --no-floppy --fs-uuid --set=root 178ba18b-3faa-4b38-b7e5-5b0f5d2f285c fi echo 'Loading Linux linux-lts ...' linux /@/boot/vmlinuz-linux-lts root=UUID=178ba18b-3faa-4b38-b7e5-5b0f5d2f285c rw rootflags=subvol=@ nowatchdog nvme_load=YES loglevel=3 zswap.enabled=0 amd-pstate=active echo 'Loading initial ramdisk ...' initrd /@/boot/amd-ucode.img /@/boot/initramfs-linux-lts-fallback.img } menuentry 'EndeavourOS Linux, with Linux linux' --class endeavouros --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-linux-advanced-178ba18b-3faa-4b38-b7e5-5b0f5d2f285c' { load_video set gfxpayload=keep insmod gzio insmod part_gpt insmod part_gpt insmod btrfs if [x$feature_platform_search_hint = xy]; then search --no-floppy --fs-uuid --set=root 178ba18b-3faa-4b38-b7e5-5b0f5d2f285c else search --no-floppy --fs-uuid --set=root 178ba18b-3faa-4b38-b7e5-5b0f5d2f285c fi echo 'Loading Linux linux ...' linux /@/boot/vmlinuz-linux root=UUID=178ba18b-3faa-4b38-b7e5-5b0f5d2f285c rw rootflags=subvol=@ nowatchdog nvme_load=YES loglevel=3 zswap.enabled=0 amd-pstate=active echo 'Loading initial ramdisk ...' initrd /@/boot/amd-ucode.img /@/boot/initramfs-linux.img } menuentry 'EndeavourOS Linux, with Linux linux (fallback initramfs)' --class endeavouros --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-linux-fallback-178ba18b-3faa-4b38-b7e5-5b0f5d2f285c' { load_video set gfxpayload=keep insmod gzio insmod part_gpt insmod part_gpt insmod btrfs if [x$feature_platform_search_hint = xy]; then search --no-floppy --fs-uuid --set=root 178ba18b-3faa-4b38-b7e5-5b0f5d2f285c else search --no-floppy --fs-uuid --set=root 178ba18b-3faa-4b38-b7e5-5b0f5d2f285c fi echo 'Loading Linux linux ...' linux /@/boot/vmlinuz-linux root=UUID=178ba18b-3faa-4b38-b7e5-5b0f5d2f285c rw rootflags=subvol=@ nowatchdog nvme_load=YES loglevel=3 zswap.enabled=0 amd-pstate=active echo 'Loading initial ramdisk ...' initrd /@/boot/amd-ucode.img /@/boot/initramfs-linux-fallback.img } } ``` So we got here 0,1,2,3 as expected, 0 being LTS, 2 being non-LTS. I then went to /etc/default/grub and changed it to ```auto GRUB_DEFAULT='2' ``` To finalize it I did a sudo dracut-rebuild and rebooted. Into a frozen plasma6 desktop. I waited some more minutes because there was life in my machine (HardDisk had some access sounds, temperature widget had changes), but no reaction to mouse and/or keyboard whatsorever. So I did a ATX-reset and this time I am up and running. Was my first screen freeze in this installation of eOS - strange. Stranger even more so: Booted into LTS! What is this trickery, what did I do wrong? ```auto inxi -F System: Host: neuromancer Kernel: 6.6.23-1-lts arch: x86_64 bits: 64 Desktop: KDE Plasma v: 6.0.2 Distro: EndeavourOS Machine: Type: Desktop Mobo: Micro-Star model: MAG X570 TOMAHAWK WIFI (MS-7C84) v: 1.0 serial: 07C8413_K91E763445 UEFI: American Megatrends LLC. v: 1.F0 date: 10/12/2023 CPU: Info: 16-core model: AMD Ryzen 9 5950X bits: 64 type: MT MCP cache: L2: 8 MiB Speed (MHz): avg: 841 min/max: 550/5084 cores: 1: 550 2: 3618 3: 550 4: 3600 5: 550 6: 550 7: 550 8: 550 9: 550 10: 550 11: 550 12: 550 13: 550 14: 550 15: 550 16: 3764 17: 550 18: 550 19: 550 20: 550 21: 550 22: 550 23: 550 24: 550 25: 550 26: 550 27: 550 28: 550 29: 550 30: 550 31: 550 32: 550 Graphics: Device-1: AMD Navi 21 [Radeon RX 6800/6800 XT / 6900 XT] driver: amdgpu v: kernel Display: server: X.Org v: 21.1.11 with: Xwayland v: 23.2.4 driver: X: loaded: amdgpu unloaded: modesetting,radeon dri: radeonsi gpu: amdgpu resolution: 1: 2560x1440 2: 2560x1440 API: EGL v: 1.5 drivers: radeonsi,swrast platforms: x11,surfaceless,device API: OpenGL v: 4.6 compat-v: 4.5 vendor: amd mesa v: 24.0.3-arch1.2 renderer: AMD Radeon RX 6800 XT (radeonsi navi21 LLVM 17.0.6 DRM 3.54 6.6.23-1-lts) API: Vulkan v: 1.3.279 drivers: radv surfaces: xcb,xlib Audio: Device-1: AMD Navi 21/23 HDMI/DP Audio driver: snd_hda_intel Device-2: Thesycon System & Consulting GmbH DX3 Pro+ driver: snd-usb-audio type: USB API: ALSA v: k6.6.23-1-lts status: kernel-api Network: Device-1: Mellanox MT27500 Family [ConnectX-3] driver: mlx4_core IF: enp36s0 state: up speed: 10000 Mbps duplex: full mac: 00:02:c9:00:00:01 Device-2: Intel Wi-Fi 6 AX200 driver: iwlwifi IF: wlan0 state: down mac: a6:60:95:16:d2:77 Bluetooth: Device-1: Intel AX200 Bluetooth driver: btusb type: USB Report: btmgmt ID: hci0 rfk-id: 0 state: down bt-service: enabled,running rfk-block: hardware: no software: yes address: 3C:9C:0F:87:ED:0C bt-v: 5.2 Drives: Local Storage: total: 18.66 TiB used: 8.77 TiB (47.0%) ID-1: /dev/nvme0n1 vendor: Seagate model: FireCuda 530 ZP2000GM30013 size: 1.82 TiB ID-2: /dev/nvme1n1 vendor: Seagate model: FireCuda 530 ZP2000GM30013 size: 1.82 TiB ID-3: /dev/sda vendor: Samsung model: SSD 860 PRO 512GB size: 476.94 GiB ID-4: /dev/sdb vendor: Seagate model: ST16000NM001G-2KK103 size: 14.55 TiB Partition: ID-1: / size: 1.82 TiB used: 1010.62 GiB (54.3%) fs: btrfs dev: /dev/nvme0n1p2 ID-2: /boot/efi size: 998 MiB used: 576 KiB (0.1%) fs: vfat dev: /dev/nvme0n1p1 ID-3: /home size: 1.82 TiB used: 1010.62 GiB (54.3%) fs: btrfs dev: /dev/nvme0n1p2 ID-4: /var/log size: 1.82 TiB used: 1010.62 GiB (54.3%) fs: btrfs dev: /dev/nvme0n1p2 Swap: ID-1: swap-1 type: zram size: 16 GiB used: 8.2 MiB (0.1%) dev: /dev/zram0 Sensors: System Temperatures: cpu: 48.9 C mobo: 36.0 C gpu: amdgpu temp: 65.0 C Fan Speeds (rpm): fan-1: 0 fan-2: 393 fan-3: 354 fan-4: 0 fan-5: 0 fan-6: 0 fan-7: 0 gpu: amdgpu fan: 0 Info: Memory: total: 64 GiB available: 62.72 GiB used: 7.5 GiB (12.0%) Processes: 544 Uptime: 11m Shell: Sudo inxi: 3.3.33 ``` ---
**Author:** ![pebcak](https://forum.endeavouros.com/user_avatar/forum.endeavouros.com/pebcak/32/100472_2.png) [@pebcak](https://forum.endeavouros.com/u/pebcak)\ **Post date:** [March 29, 2024, 11:27am UTC](https://forum.endeavouros.com/t/changing-kernel-guide/38245/15 "2024-03-29T11:27:02Z")
> [@Grub save default not working for me : /](https://forum.endeavouros.com/t/grub-save-default-not-working-for-me/52307/2): > > Are you using btrfs? If so, grub doesn’t support that option with btrfs. If you want to set a specific kernel to the default you can use something like this: GRUB\_TOP\_LEVEL=/boot/vmlinuz-linux-lts That would set the LTS kernel default for example. PS. > [@milkytwix](#): > > Sorry to necro this thread You could also create a new thread and link to other long fallen to oblivion threads like this one. Just mis dos pesos 😇 PPS. > [@milkytwix](#): > > `inxi -F` You may want to use -z flag with inxi when posting on forum: > -z, --filter Adds security filters for IP/MAC addresses, serial numbers, > location (-w), user home directory name, host name. ---
**Author:** ![dalto](https://forum.endeavouros.com/user_avatar/forum.endeavouros.com/dalto/32/5577_2.png) [@dalto](https://forum.endeavouros.com/u/dalto)\ **Post date:** [March 29, 2024, 1:18pm UTC](https://forum.endeavouros.com/t/changing-kernel-guide/38245/16 "2024-03-29T13:18:13Z")
> [@milkytwix](#): > > ```auto > initrd /@/boot/amd-ucode.img /@/boot/initramfs-linux-lts.img > } > > ``` You are loading the microcode twice. Isn’t there are an issue with the current AMD ucode and current kernel where it causes problems when double loaded? ---
**Author:** ![milkytwix](https://forum.endeavouros.com/user_avatar/forum.endeavouros.com/milkytwix/32/84303_2.png) [@milkytwix](https://forum.endeavouros.com/u/milkytwix)\ **Post date:** [March 29, 2024, 1:32pm UTC](https://forum.endeavouros.com/t/changing-kernel-guide/38245/17 "2024-03-29T13:32:33Z")
So, reading carefully and finding the correct threads is something I have to improve on… the daily struggle in learning linux 😃 Thx @pebcak - that did the trick. Loading non-lts now per default, but had a second hanger, which brings me to what @dalto has mentioned: WHY I am loading it twice? I cannot remember doing anything microcoderelated on purpose - where could that have come from? And, fast edit, more important: how to get rid of it? ---
**Author:** ![dalto](https://forum.endeavouros.com/user_avatar/forum.endeavouros.com/dalto/32/5577_2.png) [@dalto](https://forum.endeavouros.com/u/dalto)\ **Post date:** [March 29, 2024, 9:51pm UTC](https://forum.endeavouros.com/t/changing-kernel-guide/38245/18 "2024-03-29T21:51:03Z")
You can set set `GRUB_EARLY_INITRD_LINUX_STOCK=''` in `/etc/default/grub`