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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 --- - Invalid command stream (bad START_3D) on DIS gpu"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=56743">56743</a>
          </td>
        </tr>

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

        <tr>
          <th>Summary</th>
          <td>Invalid command stream (bad START_3D) on DIS gpu
          </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>intergalactic.anonymous@gmail.com
          </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>unspecified
          </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=69522" name="attach_69522" title="dmesg output">attachment 69522</a> <a href="attachment.cgi?id=69522&action=edit" title="dmesg output">[details]</a></span>
dmesg output

On my muxed hybrid system (Lenovo IdeaPad U455) X works fine with IGD gpu
(RS780M), but screen gets garbled when DIS gpu (RV710) is active. In dmesg
output there are lots of following messages:
[drm:r600_packet3_check] *ERROR* bad START_3D
[drm:radeon_cs_ib_chunk] *ERROR* Invalid command stream !

My system is:
Lenovo IdeaPad U455 with RS780M and RV710 gpus.
linux-3.7.0-rc3+
libdrm-2.4.39
xf86-video-ati-6.14.6
mesa-9.0
glu-9.0
xorg-server-1.12.3</pre>
        </div>
      </p>
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