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<base href="https://bugs.freedesktop.org/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
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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 --- - HDMI output broken"
href="https://bugs.freedesktop.org/show_bug.cgi?id=84298">84298</a>
</td>
</tr>
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<th>Assignee</th>
<td>chris@chris-wilson.co.uk
</td>
</tr>
<tr>
<th>Summary</th>
<td>HDMI output broken
</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>
<tr>
<th>Reporter</th>
<td>jean-louis@dupond.be
</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>git
</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 recently upgraded my system to Ubuntu 14.10.
Now when testing HDMI, I hit some bug.
My system is an optimus laptop.
The HDMI is connected to a nvidia card.
Now the HDMI has signal, and while logging in (so when Xorg is starting) I can
shortly move my cursor over the external display. But when login is complete,
the external display is 1 artifact, and doesn't show any updates anymore.
So I started bisecting the version from 14.10 to 14.04 (where it was working).
And I found out the following commit caused the issue:
commit 975b9798be77b30cbed485583d0ccb48318708f7
Author: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>>
Date: Wed May 21 08:58:24 2014 +0100
sna: Add support for Present
Signed-off-by: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>>
Now I recompiled the intel driver with --disabled-dri3, and that fixes the
issue also.
My hardware
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core
Processor Family Integrated Graphics Controller (rev 09)
01:00.0 VGA compatible controller: NVIDIA Corporation GF108M [GeForce GT 540M]
(rev a1)
The driver I use for the nvidia card is nouveau.</pre>
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