[Bug 84958] New: [BDW] Screen stop at certain frame when running Synmark2 cases while FPS is updating

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=84958

            Bug ID: 84958
           Summary: [BDW] Screen stop at certain frame when running
                    Synmark2 cases while FPS is updating
           Product: Mesa
           Version: unspecified
          Hardware: All
                OS: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: Drivers/DRI/i965
          Assignee: idr at freedesktop.org
          Reporter: lilix.cheng at intel.com
        QA Contact: intel-3d-bugs at lists.freedesktop.org

Created attachment 107762
  --> https://bugs.freedesktop.org/attachment.cgi?id=107762&action=edit
Xorg.log

Environment:
-----------------------------------
Platform:BDW
Libdrm:(master)libdrm-2.4.52
Mesa:c90cd077bd9c1c103d8ef36d6286599af5b3645e
Xserver:(server-1.15-branch)xorg-server-1.15.0
Xf86_video_intel:(master)2.99.910
Cairo:(master)8e11a42e3e9b679dce97ac45cd8b47322536a253
Libva:(master)ffdcb500fe50f927a55e35ab19434157fc90f39b
Libva_intel_driver:(master)f393de526b37a964572b1e5ea326bef826890d2c

Bug detailed description:
----------------------------------------------
The screen cannot update(froze at certain frame) issue when running Synmark2
cases,This issue exist on BDW platform,it doesn't exist on IVB/HSW/BYT-M.

For this issue,we have done the below verification:
1.Changed to X11R7 and the Kernel to Q2 and Q3 version,it still happens.By now
there is no good point. Please refer to Xorg.log.

2.We tried GFX SW stack as below,still see BDW test machine screen freeze at
certain frame.
Mesa and kernel using the latest version . xf86-video-intel:
(master)2.99.910(2014-03-24) . xorg-server:
(server-1.15-branch)xorg-server-1.15.0(2014-03-24)

Test with below cases:
- OglDeferred
- OglDeferredAA
- OglDrvRes
- OglDrvShComp
- OglDrvState
- OglTerrainFlyInst
- OglTerrainPanInst
- OglVSInstancing

Reproduce steps:
---------------------------------------------
1, xinit
2, ./synmark2 OglDeferred

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