[Bug 75478] New: [BDW]Some Piglit and Ogles2conform case GPU hang

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=75478

          Priority: high
            Bug ID: 75478
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [BDW]Some Piglit and Ogles2conform case GPU hang
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: critical
    Classification: Unclassified
                OS: Linux (All)
          Reporter: huax.lu at intel.com
          Hardware: All
            Status: NEW
           Version: unspecified
         Component: DRM/Intel
           Product: DRI

System Environment:
--------------------------
Platform: Broadwell
Libdrm:       
(master)libdrm-2.4.52-4-gc5de5abbd90333fe1359283fb3a5e457b0f389f3
Mesa:        (master)73c78c514f8db0605c0deb85382003d0f66b5525
Xserver:   
(master)xorg-server-1.15.0-631-g0f10cfd4b903d4db293ec47c8a9a0d8b33965803
Xf86_video_intel:(master)2.99.910-68-gff49944928c7399527b11bb0da7699711591c21a
Cairo:        (master)4144307dbfbe7b297135d9ea4b080cae7e06b997
Libva:        (staging)8be6d274d931d8041934efa63caaee75a5984755
Libva_intel_driver:(staging)bd630edd844b88ea543a027654db296ff7da16cd
Kernel:    (drm-intel-nightly)1be8f2b4dd6d3db00af24d4891c82d2650bd282d

Bug detailed description:
------------------------- 
Some Piglit and Ogles2conform cause GPU hang on above system environment.

Following Piglit cases cause GPU hang:
glsl-fs-raytrace-bug27060
spec/glsl-1.40/uniform_buffer/fs-struct-copy-complicated
spec/glsl-1.40/uniform_buffer/vs-struct-copy-complicated
spec/glsl-1.50/uniform_buffer/gs-struct-copy-complicated
shaders/glsl-fs-vec4-indexing-temp-src-in-nested-loop-combined
shaders/glsl-fs-atan-3
spec/glsl-1.30/execution/clipping/vs-clip-distance-bulk-assign
spec/glsl-1.30/execution/varying-packing-mixed-types
shaders/glsl-max-varyings


Following Ogles2conform cases cause GPU hang, then system will be no response:
(GLES20)GL_acos_acos_float_frag_xvary.test
(GLES20)GL_acos_acos_vec2_frag_xvary.test
(GLES20)GL_atan_atan_float_frag_xvary.test
(GLES20)GL_atan_atan_float_vert_xvary.test
(GLES20)GL_atan_atan_vec2_vert_xvary.test

Reproduce steps:
-------------------------
1. run ./bin/glsl-fs-raytrace-bug27060 -fbo -auto

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