[Bug 97814] New: Random GPU hangs occurs on Broadwell-U device

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=97814

            Bug ID: 97814
           Summary: Random GPU hangs occurs on Broadwell-U device
           Product: DRI
           Version: DRI git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: bobcaocheng at 163.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 126536
  --> https://bugs.freedesktop.org/attachment.cgi?id=126536&action=edit
DRM Error

DRM Error

I have a Broadwell-U device, XPS-13-9343 which has a i7-5500U with Intel HD
Graphics 5500 (a Gen8 Graphics). It occurs random gpu hang since kernel 4.x.
These bugs are not likely to reproduceble, some times it got a gpu reset and in
other case the device just get frozen.

I attached a DRM ERROR and a Dmesg when a gpu hang happened and it recoverd
after chip reset.

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