====== Build your own SteamOS ======

===== Launch =====

For best results, launch with Gamescope, so apps can launch inside of Steam. You may want to tweak the command line options depending of your setup.

==== Important gamescope flags ====

^Name^Description^
|-e|Enable Steam integration|
|%%--%%backend|Select the backend (usually drm, wayland, sdl or headless)|
|%%--%%expose-wayland|Important for launching native Wayland clients|
|-f|Fullscreen|
|-g|Grab the keyboard|
|-W, -H|Window width and height|
|%%--%%help|Check out the rest of the options|

==== Launch from a display manager ====

<code ini /usr/share/wayland-sessions/steam-big-picture.desktop>
[Desktop Entry]
Name=Steam Big Picture Mode
Comment=Start Steam in Big Picture Mode
Exec=/usr/bin/gamescope -e --expose-wayland --backend wayland --prefer-vk-device --disable-layers -- env WLR_RENDERER_ALLOW_SOFTWARE=1 steam -tenfoot -steamdeck
Type=Application
</code>

You can use ''drm'' or ''wayland'' for the backend option. Then you can configure SDDM to autostart Steam:

<code ini /etc/sddm.conf.d/autologin.conf>
[Autologin]
User=yuki
Session=steam-big-picture
</code>

==== Launch from desktop ====

Works better if the above doesn't work. Also, lets you easily access the desktop without having to quit Steam. Start a desktop session (such as KDE), create an icon with this desktop file, add it to ''~/.local/share/applications/'', and link it in ''~/.config/autostart/'':

<code ini ~/.local/share/applications/steam-big-picture.desktop>
[Desktop Entry]
Name=Steam Big Picture Mode
Comment=Start Steam in Big Picture Mode
Exec=/usr/bin/env WLR_RENDERER_ALLOW_SOFTWARE=1 gamescope -e -W 1920 -H 1080 -f -g --expose-wayland --backend sdl -- /usr/bin/steam -tenfoot -steamdeck
Type=Application
Icon=steam
</code>

You can use ''sdl'' or ''wayland'' for the backend option. Don't forget SDDM's autologin:

<code ini /etc/sddm.conf.d/autologin.conf>
[Autologin]
User=yuki
Session=plasma
</code>