[Bug 83916] [BYT ppgtt]Piglit/Ogles3conform/Webglc cases sporadically cause GPU hang

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=83916

lu hua <huax.lu at intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[BYT ppgtt]webglc cases     |[BYT
                   |sporadically cause GPU hang |ppgtt]Piglit/Ogles3conform/
                   |                            |Webglc cases sporadically
                   |                            |cause GPU hang

--- Comment #4 from lu hua <huax.lu at intel.com> ---
This bug is not confined to Webglc.
Piglit and Ogles3conform also have this issue on automation testing, but I
can't reproduce it manually.

Piglit log:
@test:
Piglit/spec_amd_shader_trinary_minmax_compiler_built-in-functions_max3-float-float-float.vert
info: @@@Returncode: 1

Cannot_connectX
test case start at: Sat Sep 27 16:27:01 2014
test case end at:   Sat Sep 27 16:27:01 2014

Errors:
piglit: error: waffle_display_connect failed due to WAFFLE_ERROR_UNKNOWN:
XOpenDisplay failed


Dmesg:<6>[43733.365715] [drm] no progress on blitter ring
<6>[43733.373268] [drm] GPU HANG: ecode -1:0x00000000, reason: Ring hung,
action: reset
<3>[43733.373408] [drm:intel_pipe_set_base] *ERROR* pin & fence failed

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