[Bug 105888] New: [CNL] System hang when running piglit.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=105888

            Bug ID: 105888
           Summary: [CNL] System hang when running piglit.
           Product: DRI
           Version: DRI git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: rafael.antognolli at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 138599
  --> https://bugs.freedesktop.org/attachment.cgi?id=138599&action=edit
dmesg output of the hang.

We are seeing system hangs on our CI. They seem to go away with some kernel
config flags:

CONFIG_DRM_I915_WERROR, CONFIG_DRM_I915_DEBUG_GEM and CONFIG_DRM_I915_TRACE_GEM

The last one seems to be the one that make the hang entirely go away.

I'm attaching a dmesg output with the error, with a kernel compiled with
CONFIG_DRM_I915_DEBUG_GEM at least.

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