https://bugs.winehq.org/show_bug.cgi?id=53020
--- Comment #9 from Jacek Caban jacek@codeweavers.com --- Created attachment 72496 --> https://bugs.winehq.org/attachment.cgi?id=72496 patch
The attached patch may help. null driver has the same problem as I spotted while converting X11 driver: https://source.winehq.org/git/wine.git/blob/HEAD:/dlls/winex11.drv/x11drv_ma...