[Bug 90854] New: [SKL] GPU reset causes hard hang

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90854

            Bug ID: 90854
           Summary: [SKL] GPU reset causes hard hang
           Product: DRI
           Version: DRI git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: ASSIGNED
          Severity: major
          Priority: highest
         Component: DRM/Intel
          Assignee: mika.kuoppala at intel.com
          Reporter: ben at bwidawsk.net
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

This is reproducible with a piglit test as well. A bit easier:
fbo-depth-array depth-clear

Timo, you can get error state if you disable reset FWIW (also you can reboot
the machine still)
i915.reset=0

Assigning to Mika per Jesse's recommendation

We can only reproduce this on D-step silicon with new BIOS. Older platforms do
not have the problem.

This was tested on drm-intel-fixes from today
(4f47c99a9be7e9b90a7f3c2c4599ea6b7c2ec49d)

Mesa master from today:
c820407ef0aac87546d1a778e169cfa1a915a219

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