[Bug 79640] New: Stuck on render ring, stuck on blitter ring

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=79640

          Priority: medium
            Bug ID: 79640
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: Stuck on render ring, stuck on blitter ring
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: major
    Classification: Unclassified
                OS: Linux (All)
          Reporter: zephrax at gmail.com
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: XOrg CVS
         Component: DRM/Intel
           Product: DRI

Created attachment 100404
  --> https://bugs.freedesktop.org/attachment.cgi?id=100404&action=edit
dump of /sys/class/drm/card0/error

Description: Screen freezes for some seconds and I got a notification in KDE
noticing a graphics reset. 

I look into system log, and get this:

[ 4535.622505] [drm] stuck on render ring
[ 4535.622509] [drm] stuck on blitter ring
[ 4535.622511] [drm] GPU crash dump saved to /sys/class/drm/card0/error
[ 4535.622512] [drm] GPU hangs can indicate a bug anywhere in the entire gfx
stack, including userspace.
[ 4535.622513] [drm] Please file a _new_ bug report on bugs.freedesktop.org
against DRI -> DRM/Intel
[ 4535.622513] [drm] drm/i915 developers can then reassign to the right
component if it's not a kernel issue.
[ 4535.622514] [drm] The gpu crash dump is required to analyze gpu hangs, so
please always attach it.


Additional info:
xf86-video-intel 2.99.911-2
Linux tesla 3.14.5-1-ARCH #1 SMP PREEMPT Sun Jun 1 07:36:23 CEST 2014 x86_64
GNU/Linux

I've attached /sys/class/drm/card0/error dump.

Steps to reproduce:
In my case, using KDE 4.13.1-1 with Desktop Effects enabled. It can not be
reproduced with desktop effects disabled.

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