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ArchLinux install notes

Open encrypted partition

cryptsetup luksOpen /dev/nvme0n1p2 root

this creates /dev/mapper/root

mount -o subvolume=@ /dev/mapper/root /mnt

BTRFS mount w/options:

mount -o noatime,space_cache=v2,compress=zstd,ssd,discard=async,subvol=@ /dev/mapper/root /mnt

GNOME wayland with nvidia

backup or remove the gdm udev rules, I moved them to the root

mv /usr/lib/udev/rules.d/61-gdm.rules /

GNOME US intl keyboard

we have to add it manually with

gsettings set org.gnome.desktop.input-sources sources "[('xkb', 'us+altgr-intl')]"
gsettings set org.gnome.desktop.input-sources xkb-options "['compose:menu','lv3:ralt_switch']"

now you can do accented letters (i.e áéíóú) with altGR+<some letter> 🤷

Fix bootloader

With crypt and btrfs no way to use grub apparently so

bootctl --path=/boot install

NVIDIA (for amd+nvidia)

If not using wayland (amd integrated GPU performances are still awful on wayland) you must install optimus-manager and gdm-prime (see opt-man repo for more info)

paru -S optimus-manager gdm-prime

reboot and select nvidia with optimus-manager --swithc nvidia laptop and external display should use nvidia now.

Firefox nvidia video decoding

  • Install nvidia vaapi thing
paru -S libva-nvidia-driver-git
  • set envvars and firefox configs from https://github.com/elFarto/nvidia-vaapi-driver
  • make sure you are using the direct rendering mode NVD_BACKEND=direct
  • either:
    • check on the nvidia settings that Video Engine Utilization is ~4% on youtube (normally it's 0%)
    • check on nvidia-smi firefox has C+G, normally processes have only G