[Bug 82642] New: [IVB/BYT/BDW/BSW]Piglit spec_glsl-1.50_execution_texelFetchOffset_gs-texelFetch-isampler1DArray sporadically causes GPU hang

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=82642

          Priority: high
            Bug ID: 82642
          Assignee: idr at freedesktop.org
           Summary: [IVB/BYT/BDW/BSW]Piglit
                    spec_glsl-1.50_execution_texelFetchOffset_gs-texelFetc
                    h-isampler1DArray sporadically causes GPU hang
        QA Contact: intel-3d-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: huax.lu at intel.com
          Hardware: All
            Status: NEW
           Version: unspecified
         Component: Drivers/DRI/i965
           Product: Mesa

System Environment:
--------------------------
Platform: BYT
Libdrm:       
(master)libdrm-2.4.56-4-g07fead4462b2d537d0c3cae69a09272fc426c598
Mesa:        (master)c66d928f2c9fa59e162c391fbdd37df969959718
Xserver:   
(master)xorg-server-1.15.99.902-121-g2f5cf9ff9a0f713b7e038636484c77f113a5f10a
Xf86_video_intel:(master)2.99.914-47-gd974dabc8ac06e76bffe5824caf86fd072c35ed3
Libva:        (master)3fddb7f937df4e0e15391bd65ae3c7552ea5b3d7
Libva_intel_driver:(master)82d2ed8d7da3619c0ea467c06604f5626fc0b901
Kernel:   (drm-intel-nightly)da31e7c60be217316278a055dd3f91c33913270f

Bug detailed description:
---------------------------
It sporadically causes GPU hang on IVB/BYT/BDW/BSW with mesa master branch,
fail rate: 2/5. Run 10 cycles on 10.2 branch, it works well.
Following cases also have this issue:
spec_glsl-1.50_execution_texelFetchOffset_gs-texelFetch-sampler1DArray
spec_glsl-1.50_execution_texelFetchOffset_gs-texelFetch-usampler2DArray
spec_glsl-1.50_execution_texelFetch_gs-texelFetch-isampler1DArray
spec_glsl-1.50_execution_texelFetch_gs-texelFetch-usampler3D

output:
65x1x5 
Probe at (5,7) 
Expected: -0.000000 0.000000 0.000000 0.100000 
Observed: 0.000000 0.000000 0.749020 0.000000 
Probe at (71,7) 
Expected: -0.000000 0.000000 0.250000 0.100000 
Observed: 0.000000 0.000000 1.000000 0.000000
intel_do_flush_locked failed: Input/output error

dmesg:
<6>[22661.139006] [drm] stuck on render ring 
<6>[22661.140623] [drm] GPU HANG: ecode 0:0x85ffffbd, in texelFetch [12893],
reason: Ring hung, action: reset 
<6>[22661.140702] [drm] GPU hangs can indicate a bug anywhere in the entire gfx
stack, including userspace. 
<6>[22661.140707] [drm] Please file a _new_ bug report on bugs.freedesktop.org
against DRI -> DRM/Intel 
<6>[22661.140709] [drm] drm/i915 developers can then reassign to the right
component if it's not a kernel issue. 
<6>[22661.140711] [drm] The gpu crash dump is required to analyze gpu hangs, so
please always attach it. 
<6>[22661.140712] [drm] GPU crash dump saved to /sys/class/drm/card0/error 
<6>[22667.138852] [drm] stuck on render ring 
<6>[22667.140428] [drm] GPU HANG: ecode 0:0x85fffffb, in texelFetch [12893],
reason: Ring hung, action: reset 

Reproduce steps:
-------------------------
1. xinit
2. bin/texelFetch offset gs isampler1DArray -fbo -auto

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