[Bug 75599] New: [HSW GT3e regression] GPU hang when running unigine demos

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=75599

          Priority: medium
            Bug ID: 75599
          Assignee: idr at freedesktop.org
           Summary: [HSW GT3e regression] GPU hang 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: git
         Component: Drivers/DRI/i965
           Product: Mesa

Platform: HSW GT3e
Libdrm:(master)libdrm-2.4.52-4-gc5de5abbd90333fe1359283fb3a5e457b0f389f3
Mesa:(master)51fc093421e4ed672ae3cba5a7f3695f3972e658
Xserver:(master)xorg-server-1.15.99.901-6-gcaf1dec2a76fbbd21259fe4cc80
Xf86_video_intel: (master)2.99.910-68-gff49944928c7399527b11bb0da769
Cairo:(master)f1709c298c355499a18796f389fa0fd9bc52b8c3
Libva:(staging)efa55e2ffcae91fa5edf64806ec71ccdda914cba
Libva_intel_driver:(staging)80d1f89388c9cb70218cd759592d2167c
Kernel:drm-intel-nightly git-1be8f2

Bug detailed description:
----------------------------------------------
GPU hang when running unigine demos (Sanctuary/Tropics) on HSW GT3e.
The problem doesn’t exist on IVB,BYT and HSW-D. Please see xorg.0.log,
dmesg.log and i915_error_state.log.

It’s Mesa regression, but it can’t be fixed by installing Mesa (good commit).
Only in place of i965_dri.so, it can be fixed. So I can’t bisect.
The Mesa good commit is git- 73c78c5, the bad commit is git-7c3138a.


Reproduce steps:
---------------------------------------------
1.xinit&
2.export LD_LIBRARY_PATH=bin/:$LD_LIBRARY_PATH 
export force_glsl_extensions_warn=true
3.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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