On Mon, Aug 10, 2020 at 01:47:08PM +0200, tomas@tuxteam.de wrote: > Have you tried another "classic" X program? For example xmag or xeyes? Yes, they fail miserably. > xterm in a special way, or the decorations of all "classic" X programs > fail in the same way. I would guess that. Should I try with another window-manager? I will also double-check that the other working buster MATE installation uses marco.