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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 --- - Screen turns black, kernel says gpu crash, [drm] stuck on render ring"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=74094">74094</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>Screen turns black, kernel says gpu crash, [drm] stuck 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>All
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>hanno@hboeck.de
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>Other
          </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=92822" name="attach_92822" title="gzipped output of /sys/class/drm/card0/error after gpu crash">attachment 92822</a> <a href="attachment.cgi?id=92822&action=edit" title="gzipped output of /sys/class/drm/card0/error after gpu crash">[details]</a></span>
gzipped output of /sys/class/drm/card0/error after gpu crash

Lately, from time to time my screen turns suddenly black. The system still
works, I can access it remotely and shutdown cleanly. This happens quite often
when I try to run youtube videos with flash, so this may be related.

In the kernel log I can read this:
Jan 26 20:25:46 pc kernel: [drm] stuck on render ring
Jan 26 20:25:46 pc kernel: [drm] GPU crash dump saved to
/sys/class/drm/card0/error
Jan 26 20:25:46 pc kernel: [drm] GPU hangs can indicate a bug anywhere in the
entire gfx stack, including userspace.
Jan 26 20:25:46 pc kernel: [drm] Please file a _new_ bug report on
bugs.freedesktop.org against DRI -> DRM/Intel
Jan 26 20:25:46 pc kernel: [drm] drm/i915 developers can then reassign to the
right component if it's not a kernel issue.
Jan 26 20:25:46 pc kernel: [drm] The gpu crash dump is required to analyze gpu
hangs, so please always attach it.
Jan 26 20:25:46 pc kernel: [drm:i915_set_reset_status] *ERROR* render ring hung
inside bo (0x2e66000 ctx 0) at 0x2e66f34
Jan 26 20:25:46 pc kernel: [drm:i915_reset] *ERROR* Failed to reset chip.

I will attach the output of 
/sys/class/drm/card0/error

xorg-server is 1.15.0, kernel 3.13, xf86-video-intel 2.99.907, mesa 9.2.5,
libdrm 2.4.52. Distribution is Gentoo Linux.</pre>
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