SteamOS session on any Arch-based distro!

This repository aims to add required SteamDeck's binaries for Gamescope Wayland session with full "Switch to Desktop", "Game Mode" support and other required components to Arch Linux.

This adds almost all of the required SteamOS dependencies, as well as FPS limiting, flyouts, performance overlay and so on.

This only works for ArchLinux running Cinnamon DE and LightDM as display manager. The files named as jupiter-biosupdate and steamos-update are just dummy files for Gamescope Session to work. I'm working on an automated installation script but just wanted to share this as soon as i got it working.

Before installing, make sure the multilib repository is enabled in /etc/pacman.conf and nano, mangohud, lib32-mangohud and mangoapp installed.

groupadd -r autologin
useradd -m ${USERNAME} -G autologin

echo "[Seat:*]
autologin-user=${USERNAME}" > /etc/lightdm/lightdm.conf.d/00-autologin-user.conf

echo "${USERNAME} ALL=(ALL) NOPASSWD: /usr/bin/dmidecode -t 11" > /etc/sudoers.d/steam
echo "${USERNAME} ALL=(ALL) NOPASSWD: /usr/bin/gamescope-session-use-lightdm" > /etc/sudoers.d/gamescope

git clone https://github.com/lostalejandro/deckifier.git && cd deckifier

cp -rf rootfs/usr/* /usr
cp -rf rootfs/etc/* /etc
chmod 777 /usr/bin/jupiter-biosupdate
chmod 777 /usr/bin/steamos-update
chmod 777 /usr/bin/steamos-session-select
gio set /usr/share/applications/org.valve.gamescope.desktop metadata::trusted true
chmod a+x /usr/share/applications/org.valve.gamescope.desktop

cd /usr/share/polkit-1/actions && nano org.valve.steamvr.policy

At line 14 replace /home/alejandro with your username
ctrl+O and Enter to Save
ctrl+X to exit

reboot

To Joaquín Ignacio Aramendía and ChimeraOS's Team. To Adam Jafarov. To Gamescope, Valve and Steam developers. To everyone involved on these amazing projects.