http://go7cnxivpns4x2trczyaabxwnrz7bwlxjiverkc32o4mjd5npjukpqid.onion/blog/2021-01-09-virtual-screen.html
This next step will freeze your Xorg, so you might want to reboot
instead or be clever about killing your Xorg or something. sudo modprobe evdi 2) Set a resolution and position to your virtual screen w=1280
h=720
set -- $(cvt "$w" "$h" 60 | grep Modeline)
name="${2#\"}"
name="${name%\"}"
shift 2
xrandr --newmode "$name" "$@"
xrandr --addmode DVI-I-1-1 "$name"
xrandr \
--output DVI-I-1-1 \
--mode "$name" \
--left-of eDP-1 3) Share your virtual screen with VNC...