wslg snapd ubuntu 20.04

.bashrc

# https://github.com/microsoft/wslg/issues/479
# https://github.com/arkane-systems/genie/issues/175#issuecomment-922526126

# Append below to your .bashrc to fix wslg

wsl_mount_root=/mnt
wsl_windir="${wsl_mount_root}/c/WINDOWS/System32"
wsl_distro=Ubuntu-20.04
wsl_wslg_display=0

# check if in-built wslg socket exists at all
if test -S $wsl_mount_root/wslg/.X11-unix/X0; then
        # fix is needed in case system socket in /tmp doesn't exist or it's true, canonical path isn't the wslg socket's one
        if ! test -e /tmp/.X11-unix/X${wsl_wslg_display} || ! test "$(readlink -f /tmp/.X11-unix/X${wsl_wslg_display})" = "$wsl_mount_root/wslg/.X11-unix/X0"; then
			echo -e "* WSL: restoring WSLG X11 server socket on /tmp/.X11-unix/X${wsl_wslg_display}"
			# recreate /tmp/.X11-unix directory if needed
			if test ! -d /tmp/.X11-unix; then
				$wsl_windir/wsl.exe -d $wsl_distro -u root install -dm 1777 -o root /tmp/.X11-unix
			fi
			# delete existing socket if needed. this must obviously break something that created that socket
			# and you'd rather define display not colliding with other sockets
			if test -e /tmp/.X11-unix/X${wsl_wslg_display}; then
				$wsl_windir/wsl.exe -d $wsl_distro -u root rm -Rf /tmp/.X11-unix/X${wsl_wslg_display} /tmp/.X${wsl_wslg_display}-lock
			fi
			# if desired display is different than wslg's default 0, check if WSLG socket doesn't already exist on X0
			# if yes, delete it aswell to avoid having the same wslg socket bound to two separate display numbers
			if test $wsl_wslg_display -ne 0; then
				if test -e /tmp/.X11-unix/X0 && test "$(readlink -f /tmp/.X11-unix/X0)" = "$wsl_mount_root/wslg/.X11-unix/X0"; then
					$wsl_windir/wsl.exe -d $wsl_distro -u root rm -Rf /tmp/.X11-unix/X0 /tmp/.X0-lock
				fi
			fi
			# create symlink to wslg socket
			$wsl_windir/wsl.exe -d $wsl_distro -u root ln -s $wsl_mount_root/wslg/.X11-unix/X0 /tmp/.X11-unix/X${wsl_wslg_display}
			# export updated display number for user's convenience
			export DISPLAY=:${wsl_wslg_display}
        fi
fi