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

        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - GPU lockup on opening new tab in Chromium"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=78238">78238</a>
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>dri-devel@lists.freedesktop.org
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>GPU lockup on opening new tab in Chromium
          </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>russianneuromancer@ya.ru
          </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/Radeon
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>DRI
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=98395" name="attach_98395" title="dmesg">attachment 98395</a> <a href="attachment.cgi?id=98395&action=edit" title="dmesg">[details]</a></span>
dmesg

If GPU blacklist is disabled in Chromium (on chrome://flags; so hardware
accelerated rendering become enabled, judging from chrome://gpu) GPU sometimes
lockup on just opening new tab (at least one time per day). After lockup I
observe same behaviour like in <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - [RV635] when GPU locks up, reset happens but X is unresponsive except mouse"
   href="show_bug.cgi?id=77892">Bug 77892</a> - reset happens but X is unresponsive
except mouse.

Radeon HD 6620G, Kubuntu 14.04 x86_64, Linux 3.15rc3, X.Org Server 1.15.1,
libdrm 2.4.54+git1405030630.5126fc, Mesa 10.3~git1405030730.64c467, radeon
driver 7.3.99+git1405030730.be1469.

As I remember, this behaviour (GPU hang on opening new tab) introduced since
Linux 3.15.</pre>
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