[Bug 23745] warcraft 3 freeze when desktop switching/minimize

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=23745

--- Comment #29 from Roman <m01brv at mail.ru> 2011-05-13 04:54:15 CDT ---
I have found some time to return to this issue, and the more detailed sequence
looks like the following:

After all loading stuff, the window has only a single property
_NET_WM_STATE_FULLSCREEN in the _NET_WM_STATE list.
When the user presses alt+tab and the game looses focus, it asks to minimize
itself and awaits until it is restored. The wine layer basically calls
XIconifyWindow() and then asks to remove the _NET_WM_STATE_FULLSCREEN atom (in
the update_net_wm_states() function). Short after that, the window receives a
few PropertyNotify events concerning _NET_WM_STATE, and by that time the
content of the _NET_WM_STATE appears now: _NET_WM_STATE_MAXIMIZED_VERT,
_NET_WM_STATE_MAXIMIZED_HORZ, _NET_WM_STATE_HIDDEN. I think these new atoms are
added by KWin when it is iconifining the window - no other source looks
possible. Wine does not request this, and by the time when it completes its
request in update_net_wm_states(), the window still has only
_NET_WM_STATE_FULLSCREEN.
When the user attempts to restore the window from the taskbar, KWin removes the
_NET_WM_STATE_HIDDEN property, but _NET_WM_STATE_MAXIMIZED_VERT and
_NET_WM_STATE_MAXIMIZED_HORZ are not altered. _NET_WM_STATE_FULLSCREEN is not
restored. Wine interpretes the window as a maximized one, and does not restore
it, as I described in comment 22.

Summarizing, iconifining the window leads to loosing the fullscreen flag, which
is not recovered by KWin automatically after restoring the window. Forcing the
window to be always fullscreen in the KDE settings fixes the problem.

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