start VcXserv on a VSOCK connection. Tested with VcXserv 1.20.14.0 and Ubuntu 20.04 WSL2. On Windows, you must be local admin.

startX.cmd

@ECHO Off
SETLOCAL
gsudo hcsdiag list > temp.txt
set /p str=<temp.txt
:: only needed, if you want to check the value
:: ECHO %str%

:: this works only, because the GUID is the first line in temp.txt!
gsudo C:\Programme\VcXsrv\vcxsrv.exe :0 -vmid {%str%} -vsockport 106000 -ac -wgl +xinerama

startX.ps1

# this should work... I can't test it, because only signed powershell-scripts are allowed
$vmid = gsudo hcsdiag list | Select-String -Pattern '(?im)^[{(]?[0-9A-F]{8}[-]?(?:[0-9A-F]{4}[-]?){3}[0-9A-F]{12}[)}]?$'
$vmid = $vmid -replace "`n",""
gsudo C:\Program Files\VcXsrv\vcxsrv.exe ':0' -vmid '{'+$vm+'}' -vsockport 106000 -ac -wgl +xinerama

startXonVsock

#! /usr/bin/env bash

if [[ -z $(pidof -s socat) ]]; then
        if [[ -S /tmp/.X11-unix/X0 ]]; then
                rm /tmp/.X11-unix/X0
        fi
        sudo socat -b65536 UNIX-LISTEN:/tmp/.X11-unix/X0,fork,mode=777 vsock-connect:2:106000 >/dev/null 2>&1 &
fi
export DISPLAY=:0
export LIBGL_ALWAYS_INDIRECT=1
# export XDG_CURRENT_DESKTOP=ubuntu:mate 
# export PULSE_SERVER=tcp:$(cat /etc/resolv.conf | grep nameserver | awk '{print $2; exit;}') #GWSL

VcXserv over VSOCK connection.md

• download, compile and install socat 1.7.4.x (http://www.dest-unreach.org/socat/)
• append startXonVsock to ~/.bashrc or put it in ~/.bashrc.d
• after login in WSL2, run startX.(cmd|ps1) in Windows to start the VcXserv
• run X session in WSL2 (e.g. MATE: mate-session > /dev/null 2>&1)
• happy clicking :)