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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 - SteamOS fails to boot with "drmmode_do_crtc_dpms cannot get last vblank counter""
   href="https://bugs.freedesktop.org/show_bug.cgi?id=111087">111087</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>SteamOS fails to boot with "drmmode_do_crtc_dpms cannot get last vblank counter"
          </td>
        </tr>

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

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

        <tr>
          <th>Hardware</th>
          <td>Other
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>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/AMDgpu
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>ludovico.denittis@collabora.com
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=144719" name="attach_144719" title="basic configuration details">attachment 144719</a> <a href="attachment.cgi?id=144719&action=edit" title="basic configuration details">[details]</a></span>
basic configuration details

When I try to boot SteamOS I end up with just a black screen.

Xorg.0.log contains this error but I'm not completely sure if it is the cause:
(EE) AMDGPU(0): drmmode_do_crtc_dpms cannot get last vblank counter

I also tried installing debian kernel 5.0.2-1~exp1, mesa 19.1.1 and all the
relevant xserver-xorg-video-* 19.0.1 but the problem persisted.</pre>
        </div>
      </p>


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