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<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [GM45] Video corruption on wide desktop"
href="https://bugs.freedesktop.org/show_bug.cgi?id=65099">65099</a>
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</tr>
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<th>Assignee</th>
<td>chris@chris-wilson.co.uk
</td>
</tr>
<tr>
<th>Summary</th>
<td>[GM45] Video corruption on wide desktop
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux (All)
</td>
</tr>
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<th>Reporter</th>
<td>freedesktop-bugs@PaulSD.com
</td>
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<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Component</th>
<td>Driver/intel
</td>
</tr>
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<th>Product</th>
<td>xorg
</td>
</tr></table>
<p>
<div>
<pre>I have a ThinkPad laptop with a GM45 chipset that I connect to two external
monitors via a Matrox DualHead2Go box.
I recently upgraded from Ubuntu Precise to Raring. After the upgrade, if I
enable the external monitors using `xrandr --output VGA1 --mode 3840x1200
--right-of LVDS1` or `xrandr --output VGA1 --mode 3840x1200 --left-of LVDS1`,
the external monitors turn on, but the entire screen (including LVDS1) is
corrupted.
Using '--above' or '--below' instead of '--right-of' or '--left-of' does not
cause screen corruption. Reverting xserver-xorg-video-intel from
2.21.6-0ubuntu4 to 2.20.9-0ubuntu2.1 without making any other changes fixes the
problem (I can use '--right-of' or '--left-of' again without screen
corruption).
I'll submit additional information as I collect it.</pre>
</div>
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