Fix WSLg graphics servers on WSL2

1-README.md

Fix WSLg on WSL2

This script fixes non-working Wayland and X11 servers on WSL2 distributions that are not distributed by Microsoft and which may not always work.

It works by linking the server sockets to those created by the WSLg system container, mounted in /mnt/wslg and accessible via wsl -d DISTRO_NAME --system.

fix-wslg.sh

#!/bin/bash
set -euo pipefail

XDG_RUNTIME_DIR="${XDG_RUNTIME_DIR:-/run/user/$UID}"

echo "Checking Wayland socket"

if [[ ! -S "$XDG_RUNTIME_DIR/$WAYLAND_DISPLAY" ]]; then
        ln -s "/mnt/wslg/runtime-dir/$WAYLAND_DISPLAY" "$XDG_RUNTIME_DIR/$WAYLAND_DISPLAY"
        ln -s "/mnt/wslg/runtime-dir/$WAYLAND_DISPLAY.lock" "$XDG_RUNTIME_DIR/$WAYLAND_DISPLAY.lock"
        echo "-> Fixed Wayland socket"
else
        echo "-> Wayland socket is present"
fi

echo "Checking X11 socket"

if [[ "$DISPLAY" != :* ]]; then
        echo "-> X11 display variable not supported"
        exit 1
fi

DISP_NUM="${DISPLAY#:}"

if [[ ! -S "/tmp/.X11-unix/X$DISP_NUM" ]]; then
        ln -s "/mnt/wslg/.X11-unix/X$DISP_NUM" "/tmp/.X11-unix/X$DISP_NUM"
        echo "-> Fixed X11 socket"
else
        echo "-> X11 socket is present"
fi