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<base href="https://bugs.freedesktop.org/" />
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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 --- - [BISECTED] Monitor on Display port shows distortions"
href="https://bugs.freedesktop.org/show_bug.cgi?id=67628">67628</a>
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<th>Assignee</th>
<td>nouveau@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Summary</th>
<td>[BISECTED] Monitor on Display port shows distortions
</td>
</tr>
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<th>QA Contact</th>
<td>xorg-team@lists.x.org
</td>
</tr>
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<th>Severity</th>
<td>major
</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>torsten.wagner@gmail.com
</td>
</tr>
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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>
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<th>Component</th>
<td>Driver/nouveau
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<th>Product</th>
<td>xorg
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=83446" name="attach_83446" title="Kernel bisect">attachment 83446</a> <a href="attachment.cgi?id=83446&action=edit" title="Kernel bisect">[details]</a></span>
Kernel bisect
Updating to a kernel > 3.8, the monitor connected via display port shows heavy
colour distortions (see attached image).
I bisect the kernel and it came down to patch
5cc027f6b1ec651c18a4322ed3e30c6e9cf01e96
(drm/nv50-/disp: move DP link training to core and train from supervisor)
This makes sens, since this patch deals with display port functions.
The problem appears during boot and hence I guess it is part of the DRM resp.
KMS part.
Attached are dmesg outputs for a working and a non-working kernel.
An image which shows the kind of distortions and the kernel bisect log.
Relevant system infos:
01:00.0 VGA compatible controller: NVIDIA Corporation GF108GL [Quadro 600] (rev
a1)
Display: DELL U2410</pre>
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