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      <base href="https://bugs.freedesktop.org/" />
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    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - [snb] [drm] stuck on render ring stuck on blitter ring"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=86836">86836</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>[snb] [drm] stuck on render ring stuck on blitter ring
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>DRI
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>unspecified
          </td>
        </tr>

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

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

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

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

        <tr>
          <th>Priority</th>
          <td>medium
          </td>
        </tr>

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

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

        <tr>
          <th>Reporter</th>
          <td>mariusz.libera@gmail.com
          </td>
        </tr>

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

        <tr>
          <th>CC</th>
          <td>intel-gfx-bugs@lists.freedesktop.org
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=110204" name="attach_110204" title="xorg">attachment 110204</a> <a href="attachment.cgi?id=110204&action=edit" title="xorg">[details]</a></span>
xorg

Firefox froze for few seconds and then it unfroze and I saw a notification from
KDE telling me that desktop effects were restarted due to graphics reset. After
that, everything seems to work as expected.
dmesg showed me:
[drm] stuck on render ring
[drm] stuck on blitter ring
[drm] GPU crash dump saved to /sys/class/drm/card0/error
[drm] GPU hangs can indicate a bug anywhere in the entire gfx stack, including
userspace.
[drm] Please file a _new_ bug report on bugs.freedesktop.org against DRI ->
DRM/Intel
[drm] drm/i915 developers can then reassign to the right component if it's not
a kernel issue.
[drm] The gpu crash dump is required to analyze gpu hangs, so please always
attach it.


SandyBridge in Lenovo laptop

OS:              Archlinux 64bit
kernel           3.14.25 LTS
xserver          1.16.2
xorg-video-intel 2.99.916
mesa             10.3.4
libdrm           2.4.58
desktop          KDE 4.14.3</pre>
        </div>
      </p>
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