http://bugs.winehq.org/show_bug.cgi?id=60333 --- Comment #6 from Béla Gyebrószki <gyebro69@gmail.com> --- (In reply to Rémi Bernon from comment #5)
This seems to be an issue with the window manager. It resizes the window to its normal size, according to the WM_NORMAL_HINTS property we set (to 640x480) while the window is still in a fullscreen state from a _NET_WM_STATE request we made.
I would argue that it is supposed to either, 1) not resize the window whenever it is fullscreen, or 2) remove the fullscreen bit from _NET_WM_STATE if it decides to resize it to its normal size.
I'll see if we could perhaps try to avoid triggering that case, by adding more delays and dependencies between our requests, but overall it seems to me that it's a WM bug. Thanks, that makes sense. The fact that the same Wine X11 driver works correctly under KWin/Xwayland, and that disabling managed windows also avoids the problem under Xfwm, seems to support this being an Xfwm-specific issue. I can file a corresponding report against Xfwm and link this Wine bug there. I am also happy to test any Wine-side workaround you may propose.
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