[Bug 78356] New: [3.14.2] [drm] Stuck on BSD ring

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=78356

          Priority: medium
            Bug ID: 78356
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [3.14.2] [drm] Stuck on BSD ring
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: nicolashillegeer at gmail.com
          Hardware: Other
            Status: NEW
           Version: XOrg CVS
         Component: DRM/Intel
           Product: DRI

Created attachment 98583
  --> https://bugs.freedesktop.org/attachment.cgi?id=98583&action=edit
dmesg log of the crash

On the latest kernel I just experienced a rather nasty hang which left the
machine unworkable. I had to power-cycle to reset it.

I'm running on a modified debian wheezy system (amd64). By modified I mean most
of the video-related packages have been updated by me, and the kernel as well.

I regret to inform that the file at /sys/class/drm/card0/error was empty after
I rebooted the unit and got around to look at it. What can I do to keep this
file around as long as possible?

What was I doing?
-----------------

Playing about 3 videos concurrently via mplayer with vaapi hardware
acceleration. The videos were encoded in the h.264 format. There was a browser
(latest chromium) and some flash presentations running as well.

Packages
--------
xorg                                  1:7.7+3~deb7u1
xserver-xorg-core                     2:1.12.4-6+deb7u2            
xserver-xorg-video-intel              2:2.21.15-1
libgl1-mesa-dri:amd64                 9.2.2-2
libgl1-mesa-glx:amd64                 9.2.2-2

ii  linux-image-3.14.2+                   3.14.2-1                          
amd64        Linux kernel binary image for version 3.14.2+
ii  libva-dev                             1.3.0-1                           
amd64        Video Acceleration (VA) API for Linux -- development files
ii  libva-drm1                            1.3.0-1                           
amd64        Video Acceleration (VA) API for Linux -- DRM runtime
ii  libva-glx1                            1.3.0-1                           
amd64        Video Acceleration (VA) API for Linux -- GLX runtime
ii  libva-intel-driver                    1.3.0-1                           
amd64        VA driver for Intel G45 & HD Graphics family
ii  libva-wayland1                        1.3.0-1                           
amd64        Video Acceleration (VA) API for Linux -- Wayland runtime
ii  libva-x11-1                           1.3.0-1                           
amd64        Video Acceleration (VA) API for Linux -- X11 runtime
ii  libva1                                1.3.0-1                           
amd64        Video Acceleration (VA) API for Linux -- Core runtime
ii  libva-intel-driver                    1.3.0-1                           
amd64        VA driver for Intel G45 & HD Graphics family

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