[Bug 82900] New: [IVB/HSW/BYT-M bisected]Show "white screen" when running unigine-demos

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=82900

          Priority: medium
            Bug ID: 82900
          Assignee: idr at freedesktop.org
           Summary: [IVB/HSW/BYT-M bisected]Show "white screen" when
                    running unigine-demos
        QA Contact: intel-3d-bugs at lists.freedesktop.org
          Severity: major
    Classification: Unclassified
                OS: Linux (All)
          Reporter: jianx.zhou at intel.com
          Hardware: All
            Status: NEW
           Version: unspecified
         Component: Drivers/DRI/i965
           Product: Mesa

Platform:IVB/HSW/BYT-M
Libdrm:(master)libdrm-2.4.56-8-gd9ce09de12131fa8c5ff2d7c2dbd6b61d8a5fd14
Mesa:(master)a1853eaea7fa5caf59b52567cc49f964ce5293ec
Xserver:(master)xorg-server-1.15.99.902-121-g2f5cf9ff9a0f713b7e0386
Xf86_video_intel:(master)2.99.914-60-gf5469681b620d9d6ccaf53e92ed31f931cb03b0d
Cairo:(master)932548ef25864958ef966ffe83e7c945c3ff3cd4
Libva:(master)acfcd5f0637a951d50c5112c7dfbd46f1d0dcdb3
Libva_intel_driver:(master)f3f49f2f0e6b3669d9b09341a11cf0b96e138674
Kernel:(drm-intel-nightly)49ceddc7b3b0e3f7eb21b9fb4c9b840cff630047

Bug detailed description:
----------------------------------------------
Show "white screen" when running unigine-demos on IVB/HSW/BYT-M,This issue both
on gnome-session and Raw X,this issue doesn't exist on BDW.you can see 1.png.
It's Mesa regression,bisected the result show first bad commit is:
commit 4a3667993e8c3bace135791efbe2163a82bbfc56
Author:     Chris Forbes <chrisf at ijw.co.nz>
AuthorDate: Sun Aug 10 14:36:25 2014 +1200
Commit:     Chris Forbes <chrisf at ijw.co.nz>
CommitDate: Fri Aug 15 19:24:56 2014 +1200
    i965: Enable ARB_gpu_shader5 on Gen7

Reproduce steps:
---------------------------------------------
1. xinit&
2. export LD_LIBRARY_PATH=bin/:$LD_LIBRARY_PATH 
   export force_glsl_extensions_warn=true
   vblank_mode=0 ./bin/Sanctuary -video_app opengl -data_path ../ -sound_app
null -system_script sanctuary/unigine.cpp -engine_config ../data/unigine.cfg
-video_mode -1 -video_fullscreen 1 -extern_define PHORONIX -video_width 1920
-video_height 1080

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