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      <base href="https://bugs.freedesktop.org/" />
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    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Priority</th>
          <td>medium
          </td>
        </tr>

        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - [drm:ring_stuck] *ERROR* Kicking stuck wait on render ring"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=77782">77782</a>
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>intel-gfx-bugs@lists.freedesktop.org
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>intel-gfx-bugs@lists.freedesktop.org
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>[drm:ring_stuck] *ERROR* Kicking stuck wait on render ring
          </td>
        </tr>

        <tr>
          <th>QA Contact</th>
          <td>intel-gfx-bugs@lists.freedesktop.org
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>normal
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Linux (All)
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>dmitry.sinina@onat.edu.ua
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>x86-64 (AMD64)
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>XOrg CVS
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>DRM/Intel
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>DRI
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=97775" name="attach_97775" title="content of /sys/class/drm/card0/error">attachment 97775</a> <a href="attachment.cgi?id=97775&action=edit" title="content of /sys/class/drm/card0/error">[details]</a></span>
content of /sys/class/drm/card0/error

My hardware:
 Lenovo Thinpad x220 laptop;
 i5-2520M cpu;
 00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core   
Processor Family Integrated Graphics Controller (rev 09)

My system is Debian testing, kernel 3.13.

When I tried run video (vlc player or youtube in chromium browser) on external
connected monitor(VGA) I got system freeze.

I see this in dmesg:

[ 6456.881715] [drm:ring_stuck] *ERROR* Kicking stuck wait on render ring
[ 6456.881721] [drm] GPU crash dump saved to /sys/class/drm/card0/error
[ 6456.881722] [drm] GPU hangs can indicate a bug anywhere in the entire gfx
stack, including userspace.
[ 6456.881723] [drm] Please file a _new_ bug report on bugs.freedesktop.org
against DRI -> DRM/Intel
[ 6456.881724] [drm] drm/i915 developers can then reassign to the right
component if it's not a kernel issue.
[ 6456.881724] [drm] The gpu crash dump is required to analyze gpu hangs, so
please always attach it.
[ 6466.895407] [drm:ring_stuck] *ERROR* Kicking stuck wait on render ring
[ 6472.884421] [drm:ring_stuck] *ERROR* Kicking stuck wait on render ring


Content of /sys/class/drm/card0/error attached.

In Xorg logs I see lot of messages:

(EE) Backtrace:
(EE) 0: /usr/bin/X (xorg_backtrace+0x48) [0x7f3e2ca5ce98]
(EE) 1: /usr/bin/X (QueuePointerEvents+0x52) [0x7f3e2c921852]
(EE) 2: /usr/lib/xorg/modules/input/evdev_drv.so (0x7f3e24814000+0x570d)
[0x7f3e2481970d]
(EE) 3: /usr/bin/X (0x7f3e2c8b5000+0x92ae8) [0x7f3e2c947ae8]
(EE) 4: /usr/bin/X (0x7f3e2c8b5000+0xbad50) [0x7f3e2c96fd50]
(EE) 5: /lib/x86_64-linux-gnu/libpthread.so.0 (0x7f3e2b74f000+0xf880)
[0x7f3e2b75e880]
(EE) 6: /lib/x86_64-linux-gnu/libc.so.6 (ioctl+0x7) [0x7f3e2a26a567]
(EE) 7: /usr/lib/x86_64-linux-gnu/libdrm.so.2 (drmIoctl+0x34) [0x7f3e2b546764]
(EE) 8: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f3e26ce3000+0x26e9b)
[0x7f3e26d09e9b]
(EE) 9: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f3e26ce3000+0x52563)
[0x7f3e26d35563]
(EE) 10: /usr/bin/X (0x7f3e2c8b5000+0x1327b4) [0x7f3e2c9e77b4]
(EE) 11: /usr/bin/X (0x7f3e2c8b5000+0xe2337) [0x7f3e2c997337]
(EE) 12: /usr/bin/X (0x7f3e2c8b5000+0xe30e5) [0x7f3e2c9980e5]
(EE) 13: /usr/bin/X (0x7f3e2c8b5000+0xe1a1d) [0x7f3e2c996a1d]
(EE) 14: /usr/bin/X (0x7f3e2c8b5000+0x7e3c6) [0x7f3e2c9333c6]
(EE) 15: /usr/bin/X (MapWindow+0x105) [0x7f3e2c9361b5]
(EE) 16: /usr/bin/X (0x7f3e2c8b5000+0x50908) [0x7f3e2c905908]
(EE) 17: /usr/bin/X (0x7f3e2c8b5000+0x5586e) [0x7f3e2c90a86e]
(EE) 18: /usr/bin/X (0x7f3e2c8b5000+0x5968a) [0x7f3e2c90e68a]
(EE) 19: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xf5)
[0x7f3e2a1adb45]
(EE) 20: /usr/bin/X (0x7f3e2c8b5000+0x44c2e) [0x7f3e2c8f9c2e]
(EE) 
[  6455.804] [mi] Increasing EQ size to 1024 to prevent dropped events.
[  6455.804] [mi] EQ processing has resumed after 317 dropped events.
[  6455.804] [mi] This may be caused my a misbehaving driver monopolizing the
server's resources.

What additional information I have to show?
Thanks.</pre>
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