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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 - Lenovo Thinkpad E450 (Kaveri A6-7000 Radeon R4) Blank Screen after suspend (displayport link issues)"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=99779">99779</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Lenovo Thinkpad E450 (Kaveri A6-7000 Radeon R4) Blank Screen after suspend (displayport link issues)
          </td>
        </tr>

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

        <tr>
          <th>Version</th>
          <td>XOrg git
          </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>critical
          </td>
        </tr>

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

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

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

        <tr>
          <th>Reporter</th>
          <td>brookskd@gmail.com
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=129527" name="attach_129527" title="dmesg 4.9.8">attachment 129527</a> <a href="attachment.cgi?id=129527&action=edit" title="dmesg 4.9.8">[details]</a></span>
dmesg 4.9.8

If I shut my laptop lit it suspends, then when opening the lid and resuming I
get a blank screen and am unable to get the display to work again unless I
reboot.  I can ssh into computer and I get displayport link errors in the
attached dmesg log.

This issue does not occur if I use the radeon kernel module instead of amdgpu.

This seems very similar to <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - Lenovo ThinkPad E455 (Kaveri A10-7300): Blank built-in screen with radeon kms driver"
   href="show_bug.cgi?id=90320">bug 90320</a> but I filed this one because it is amdgpu
not radeon:
<a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - Lenovo ThinkPad E455 (Kaveri A10-7300): Blank built-in screen with radeon kms driver"
   href="show_bug.cgi?id=90320">https://bugs.freedesktop.org/show_bug.cgi?id=90320</a>

I've also attached the Xorg.0.log but it does not have any errors indicated. 
It indicates successful exit because I stopped the server over ssh and tried to
restart gdm a few times which is why there are multiple displayport link status
failed messages in dmesg.</pre>
        </div>
      </p>


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