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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 - [REGRESSION] KMS having issues after kernel upgrade (4.5.1-1 to 4.6.4-1)"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=97620">97620</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>[REGRESSION] KMS having issues after kernel upgrade (4.5.1-1 to 4.6.4-1)
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>xorg
          </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>critical
          </td>
        </tr>

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

        <tr>
          <th>Component</th>
          <td>Driver/nouveau
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>nouveau@lists.freedesktop.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>lukeisgreat@gmail.com
          </td>
        </tr>

        <tr>
          <th>QA Contact</th>
          <td>xorg-team@lists.x.org
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=126259" name="attach_126259" title="working kernel version">attachment 126259</a> <a href="attachment.cgi?id=126259&action=edit" title="working kernel version">[details]</a></span>
working kernel version

Originally diagnosed in <a href="https://bbs.archlinux.org/viewtopic.php?id=216364">https://bbs.archlinux.org/viewtopic.php?id=216364</a>

distro is Arch. Music studio machine with an nvidia GeForce GTX 460 and
"ACHIEVA Shimian QH270-Lite 27" Wide QHD PC Monitor DVI-D 2560x1440" connected
via DVI.

Have been using nouveau without issue since 2012. Kernel update from 4.5.1-1 to
(4.6.4-1 or 4.6.7-rt11-2-rt) causes a lower than standard resolution during
kernel messages then no video once X attempts to start. Reverting to 4.5.1-1
works perfectly. "nomodeset single" kernel options allow me to get to a
terminal.

some package versions that don't change between kernels:
extra/mesa 12.0.2-1 [installed]
extra/xf86-video-nouveau 1.0.12-2 (xorg-drivers xorg) [installed]</pre>
        </div>
      </p>


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