revert Debian to Xorg

Spice and qxl driver don't work well with Wayland sessions (for which virtio-gpu (virgl) works better but we don't have gpus atm)

Author: zgrimshell

scripts/firstrun.sh

@@ -134,6 +134,7 @@ if [ x"$SHELLS_USERNAME" != x ]; then
 		sed -i "/\[daemon]/a AutomaticLoginEnable=True" /etc/gdm3/custom.conf
 	elif [ -f /etc/gdm3/daemon.conf ]; then
 		# replace "#  AutomaticLogin" → "  AutomaticLogin = xxx" #Debian has daemon.conf instead of custom.conf
+		sed -i "/\[daemon]/a WaylandEnable=false" "/etc/gdm3/daemon.conf"
 		sed -i -r -e "s/#( *)AutomaticLogin/\1AutomaticLogin/;s/AutomaticLogin =.*/AutomaticLogin = $SHELLS_USERNAME/" "/etc/gdm3/daemon.conf"
 	fi
 	if [ -f /etc/gdm/custom.conf ]; then