[Bug 28520] New: Diablo II game menu fps regression

http://bugs.winehq.org/show_bug.cgi?id=28520

Bug #: 28520
           Summary: Diablo II game menu fps regression
           Product: Wine
           Version: 1.3.29
          Platform: x86-64
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: directx-ddraw
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]
                CC: [e-mail]
    Classification: Unclassified
   Regression SHA1: 1aeee59bd8b6172c848c8029e1a55ddac1f93c44

There has been a behavior change in the game Diablo II caused by

http://source.winehq.org/git/wine.git/?a=commit;h=1aeee59bd8b6172c848c8029e1...
Author: Henri Verbeet 
Date:   Thu Sep 15 20:01:50 2011 +0200
    ddraw: Use offscreen backbuffers.

Before this patch the frame rate in the game menu (press Esc while in game) was
limited to <=60. Now the frame rate can reach hundreds. Behavior on Windows:
frame rate is limited at 60.

The reason I am reporting this: Shortly after opening the game menu there often
is a short but very noticeable phase where everything behaves sluggishly,
making it very hard to select the desired entry with the mouse.

The sluggishness/slowdown itself may not be a Wine bug since is not a problem
when I switch NVIDIA PowerMizer from its default "Adaptive" to "Prefer Maximum
Performance". That, however, is not an acceptable permanent solution on a
laptop. Sync to VBlank settings do not change the behavior.

So far I have only been able to observe the slowdown when running the game in
Direct3D mode, although the frame rate is now also unlimited when running in
DirectDraw mode. All observations have been made with Diablo II Lord of
Destruction 1.13c.