[Bug 8559] New: DirectX game windows go blank when switching virtual desktops or minimizing

[Wine Bugs]

http://bugs.winehq.org/show_bug.cgi?id=8559

Summary: DirectX game windows go blank when switching virtual
                    desktops or minimizing
           Product: Wine
           Version: unspecified
          Platform: Other
        OS/Version: other
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: wine-directx
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]

This happens with WINE 0.9.37 (have not had an opportunity to test the new 
version yet) when playing Ragnarok Online.

Switching virtual desktops (using keyboard shortcuts) results in the window 
going blank. Also actions such as minimize/restore of the window cause this.

Throughout gameplay there is a constant stream of:
fixme:ddraw:IDirectDrawImpl_WaitForVerticalBlank (0x1c8830)->(1,(nil)): Stub
...in the console window.

When the problem occurred most recently, this was the last line of output in 
the console:
err:ntdll:RtlpWaitForCriticalSection section 0x7e3d0c40 "x11drv_main.c: 
X11DRV_CritSection" wait timed out in thread 001a, blocked by 0014, retrying 
(60 sec)