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    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Priority</th>
          <td>medium
          </td>
        </tr>

        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - intel-virtual-output: fatal IO error 9 when external display is enabled"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=79994">79994</a>
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>chris@chris-wilson.co.uk
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>intel-virtual-output: fatal IO error 9 when external display is enabled
          </td>
        </tr>

        <tr>
          <th>QA Contact</th>
          <td>intel-gfx-bugs@lists.freedesktop.org
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>normal
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Linux (All)
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>main.haarp@gmail.com
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>x86-64 (AMD64)
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

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

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

        <tr>
          <th>Product</th>
          <td>xorg
          </td>
        </tr></table>
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        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=100992" name="attach_100992" title="i-v-o debug output">attachment 100992</a> <a href="attachment.cgi?id=100992&action=edit" title="i-v-o debug output">[details]</a></span>
i-v-o debug output

Greetings.

I'm using today's git of xf86-video-intel (but the same can be observed on
2.99.912). xorg-server-1.15.0. Gentoo Linux. Thinkpad W520 (SNB) with Nvidia
Quadro 2000M (handled via bumblebee).


I'm trying to get i-v-o to work. I can start the second X server on the
discrete GPU and have it enable the external display. It is disabled again when
I start i-v-o. so far so good.

Main X is on :0 and the secondary X on :8.

I now go ahead and enable the virtual output on :0
$ xrandr --output VIRTUAL1 --auto --right-of LVDS1

As soon as I do that, i-v-o crashes with:
XIO:  fatal IO error 9 (Bad file descriptor) on X server ":0.0"

Also see the attached log. There is nothing suspicious in either X's logfiles.
If you need any additional logs, let me know.

What's going on here? How can I help?</pre>
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