Reboot to UEFI BIOS on Steam Deck

  1. In Desktop Mode, create a text file called “uefireboot.desktop”
  2. Open this file in a text editor (Kate)
  3. Enter following content
  4. [Desktop Entry]
Type=Application
Name=Reboot to UEFI
Comment=Reboot to UEFI
Exec=systemctl reboot --firmware-setup
Icon=steamdeck-gaming-return
Terminal=true
Categories=System
  5. Mark the file as executable
    1. Right click on file → Properties → Permissions → Check `Is executable`
    2. Or use 
      chmod +x ./uefireboot.desktop
  6. Run the .desktop file