[Bug 94002] New: [drm] GPU HANG: ecode 9:0:0x85dfbfff, in firefox [881], reason: Ring hung, action: reset

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94002

            Bug ID: 94002
           Summary: [drm] GPU HANG: ecode 9:0:0x85dfbfff, in firefox
                    [881], reason: Ring hung, action: reset
           Product: DRI
           Version: XOrg git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: yuv.adm at gmail.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 121518
  --> https://bugs.freedesktop.org/attachment.cgi?id=121518&action=edit
bzip'd /sys/class/drm/card0/error

On a Skylake system (i5-6260U, Intel NUC6i5SYH) I'm getting multiple GPU
crashes up to the point of complete system freeze. This reproduces easily when
opening a browser with WebGL-intensive processes, and happens within 10-20
seconds.

Running x86_64 Arch Linux, kernel 4.4.1. Tested with 4.5-rc2 and same problem
occurs there as well.

Error log attached.

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