[Bug 92589] [BDW, BSW, SKL-Y] [GLES 3.1 CTS] ES31-CTS.texture_gather.* GPU_HANG

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=92589

            Bug ID: 92589
           Summary: [BDW,BSW,SKL-Y] [GLES 3.1 CTS]
                    ES31-CTS.texture_gather.* GPU_HANG
           Product: Mesa
           Version: 11.0
          Hardware: Other
                OS: All
            Status: NEW
          Severity: major
          Priority: medium
         Component: Drivers/DRI/i965
          Assignee: idr at freedesktop.org
          Reporter: marta.lofstedt at intel.com
        QA Contact: intel-3d-bugs at lists.freedesktop.org

Created attachment 119061
  --> https://bugs.freedesktop.org/attachment.cgi?id=119061&action=edit
dmesg with GPU_HANG

Software versions:
    4.3.0-rc3+
    OpenGL version string: 3.0 Mesa 11.1.0-devel (git-13a5805)

GPU hardware:
    OpenGL renderer string: Mesa DRI Intel(R) HD Graphics 5300 (Broadwell GT2)
    00:02.0 VGA compatible controller [0300]: Intel Corporation Broadwell-U
Integrated Graphics [8086:161e] (rev 06)

CPU hardware:
    x86_64
    Genuine Intel(R) CPU 0000 @ 0.60GHz

CTS version:
git at 67ae88f31295

command: 
./glcts --deqp-case=ES31-CTS.texture_gather*

Environment:
Mesa built with: --enable-debug
export MESA_GLES_VERSION_OVERRIDE=3.1
export MESA_EXTENSION_OVERRIDE=GL_ARB_compute_shader

------------------------------------------------------
When running all the texture_gather test of the OpenGL ES 3.1 CTS, execution
stops after 3 or 4 test with:
"intel_do_flush_locked failed: Input/output error"

dmesg shows:[drm] GPU HANG: ecode 8:0:0x85ddfffb, in glcts [26007], reason:
Ring hung, action: reset

The is not reproducible when the tests are run alone.
The issue is not reproducible on HSW.

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