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<base href="https://bugs.freedesktop.org/" />
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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 --- - [i915 vga output] glitchy output when attaching external monitor"
href="https://bugs.freedesktop.org/show_bug.cgi?id=63383">63383</a>
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Summary</th>
<td>[i915 vga output] glitchy output when attaching external monitor
</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>christopherarges@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>XOrg CVS
</td>
</tr>
<tr>
<th>Component</th>
<td>DRM/Intel
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=77747" name="attach_77747" title="Glitchy Output">attachment 77747</a> <a href="attachment.cgi?id=77747&action=edit" title="Glitchy Output">[details]</a></span>
Glitchy Output
If I attach an external monitor to my Lenovo Thinkpad T420 and type the
following command:
xrandr --output VGA1 --auto --primary --output LVDS1 --off
I get glitchy output as shown in the attached picture.
I have tested with a pre-built Ubuntu kernel here:
<a href="http://kernel.ubuntu.com/~kernel-ppa/mainline/drm-intel-next/current/">http://kernel.ubuntu.com/~kernel-ppa/mainline/drm-intel-next/current/</a>
This should be commit bae3699182027525d92b97d904578a533264b242 from the
drm-intel tree next branch.
The related launchpad bug is here:
<a href="https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1157678">https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1157678</a>
While <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - Resume in multihead configuration leads to broken background"
href="show_bug.cgi?id=57160">https://bugs.freedesktop.org/show_bug.cgi?id=57160</a> is linked in the bug,
I believe this is another issue. I've tested with a kernel that contains the
patch and it did not fix the issue.
My graphics card is:
2nd Generation Core Processor Family Integrated Graphics Controller [8086:116]</pre>
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