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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 --- - [HD 4000] triple monitor configuration - resolutions above 1024x768 hangs/locks kernel and/or xserver"
href="https://bugs.freedesktop.org/show_bug.cgi?id=62564">62564</a>
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Summary</th>
<td>[HD 4000] triple monitor configuration - resolutions above 1024x768 hangs/locks kernel and/or xserver
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Severity</th>
<td>major
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux (All)
</td>
</tr>
<tr>
<th>Reporter</th>
<td>ipejic@gmail.com
</td>
</tr>
<tr>
<th>Hardware</th>
<td>x86 (IA32)
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</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=76831" name="attach_76831" title="xrandr --verbose">attachment 76831</a> <a href="attachment.cgi?id=76831&action=edit" title="xrandr --verbose">[details]</a></span>
xrandr --verbose
System environment:
-- chipset: QM77
-- system architecture: i686
-- xf86-video-intel: 2.20.0
-- xserver: 1.11.3
-- mesa: 9.0.1
-- libdrm version: 2.4.32-1ubuntu1
-- kernel version: 3.5.0-26-generic
-- Linux distribution: Ubuntu 12.04.2
-- Motherboard: kino-qm770-r10
-- Display connector: DVI, HDMI, HDMI
Setting native monitor resolutions above 1024x768 for all three monitors always
produce this continuously repeating error:
...
[drm:intel_dp_start_link_train], training pattern 1 signal levels 00000000
[drm:intel_dp_start_link_train], training pattern 1 signal levels 02000000
[drm:intel_dp_start_link_train], training pattern 1 signal levels 04000000
...
Kernel 3.2.x hangs during boot.
Kernel 3.5.x - 3.9 will boot fine by automatically setting resolution to
1024x768
However, no matter which combination of connectors I use issuing commands such
as:
xrandr --output VGA1 --auto --output DP2 --auto --output DP3 --auto
or
xrandr --output HDMI1 --auto --output DP2 --auto --output DP3 --auto
will always trigger this error.
Same monitor configuration works fine in Win7 so I assume that hardware is ok.
:|</pre>
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