[Bug 85069] New: Freeze system

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=85069

            Bug ID: 85069
           Summary: Freeze system
           Product: DRI
           Version: XOrg CVS
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: freeniki at yandex.ru
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 107891
  --> https://bugs.freedesktop.org/attachment.cgi?id=107891&action=edit
/sys/class/drm/card0/error

Periodic system freeze. 
OS: Ubuntu 14.04 amd64
DE: Unity
PC: Dell 3721
GPU: Intel HD4000
CPU: Intel Core i3-3217U
dmsg log:
[10303.130413] perf samples too long (2504 > 2500), lowering
kernel.perf_event_max_sample_rate to 50000
[11631.300193] [drm] stuck on render ring
[11631.300204] [drm] GPU crash dump saved to /sys/class/drm/card0/error
[11631.300206] [drm] GPU hangs can indicate a bug anywhere in the entire gfx
stack, including userspace.
[11631.300207] [drm] Please file a _new_ bug report on bugs.freedesktop.org
against DRI -> DRM/Intel
[11631.300208] [drm] drm/i915 developers can then reassign to the right
component if it's not a kernel issue.
[11631.300209] [drm] The gpu crash dump is required to analyze gpu hangs, so
please always attach it.

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