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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 - [Mobility Radeon HD 4570] Enabling HDMI monitor fails with kernel versions 3.17/3.16"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=85801">85801</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>[Mobility Radeon HD 4570] Enabling HDMI monitor fails with kernel versions 3.17/3.16
          </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>major
          </td>
        </tr>

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

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

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

        <tr>
          <th>Reporter</th>
          <td>CE.Mohammad.AlSaleh@gmail.com
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=108839" name="attach_108839" title="dmesg output with the relevant call trace">attachment 108839</a> <a href="attachment.cgi?id=108839&action=edit" title="dmesg output with the relevant call trace">[details]</a></span>
dmesg output with the relevant call trace

With kernel version 3.17.2, when I connect my HDMI monitor, it shows up
correctly in xrandr. But when I try to enable it, Xorg freezes and becomes a
zombie process, and the HDMI monitor stays blank. dmesg hints radeon kernel
code is at fault (attached).

Luckily, the system does not completely freeze. I can still connect to the
system through ssh. So I can provide more information if needed.

I remember having similar issues with 3.16 when I tried it. I'm currently using
3.15.5 which does not suffer from this bug.</pre>
        </div>
      </p>
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