http://bugs.winehq.org/show_bug.cgi?id=58734
--- Comment #2 from Alexandre Julliard julliard@winehq.org --- (In reply to Stian Low from comment #1)
I could not find DISPLAY=wine anywhere in documentation:
There's no such thing as 'DISPLAY=wine'. The forum post mentions 'DISPLAY=', which means unsetting DISPLAY to force wayland.