<html>
    <head>
      <base href="https://bugs.freedesktop.org/" />
    </head>
    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - GM204 (NV124) black screen on modesetting"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=90976">90976</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>GM204 (NV124) black screen on modesetting
          </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>major
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>high
          </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>roucaries.bastien+bugs@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=116492" name="attach_116492" title="dmesg">attachment 116492</a> <a href="attachment.cgi?id=116492&action=edit" title="dmesg">[details]</a></span>
dmesg

Modesetting does not work.

The card is linked to sony bravia TV through HDMI

I achieved to get a trace by blacklisting nouveau then manually load it.
error log here (full dmesg joinded):
[  143.521000] nouveau E[     DRM] Pointer to flat panel table invalid
[  143.525351] nouveau W[     DRM] unknown connector type 70
[  143.525387] nouveau W[     DRM] failed to create encoder 1/8/0: -19
[  143.525388] nouveau W[     DRM] Unknown-1 has no encoders, removing
[  143.525407] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[  143.525407] [drm] Driver supports precise vblank timestamp query.
[  143.525424] nouveau E[     DRM] failed to initialise sync subsystem, -38
[  143.819264] nouveau  [     DRM] allocated 1920x1080 fb: 0x60000, bo
ffff8802135d3000

What could I do ?</pre>
        </div>
      </p>
      <hr>
      <span>You are receiving this mail because:</span>
      
      <ul>
          <li>You are the assignee for the bug.</li>
      </ul>
    </body>
</html>