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<base href="https://bugs.freedesktop.org/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Can't "connect" to external display attached to docking station via DP on laptop with Intel/AMD dual"
href="https://bugs.freedesktop.org/show_bug.cgi?id=95298">95298</a>
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<th>Summary</th>
<td>Can't "connect" to external display attached to docking station via DP on laptop with Intel/AMD dual
</td>
</tr>
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<th>Product</th>
<td>DRI
</td>
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<th>Version</th>
<td>XOrg git
</td>
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<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
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<th>OS</th>
<td>Linux (All)
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>medium
</td>
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<th>Component</th>
<td>DRM/Radeon
</td>
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<th>Assignee</th>
<td>dri-devel@lists.freedesktop.org
</td>
</tr>
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<th>Reporter</th>
<td>debian@onerussian.com
</td>
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<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=123520" name="attach_123520" title="entire dmesg from the boot #1">attachment 123520</a> <a href="attachment.cgi?id=123520&action=edit" title="entire dmesg from the boot #1">[details]</a></span>
entire dmesg from the boot #1
I have HP zbook 14 and using Debian testing/unstable. External monitor is
connected to docking station serving two DP connections. To make those visible
to xrandr I do
xrandr --setprovideroffloadsink 1 0
xrandr --setprovideroutputsource 1 0
where 0 corresponds to Intel, 1 to Radeon/OLAND (name changed when upgraded).
Setup was working with stock debian packages (kernel was 4.4.2-3) for awhile
but there was an issue that display didn't refresh correctly and often I had
blank patches and had to go to gnome overview and back to re-render. So I have
decided to upgrade to a current state of testing + some unstable. Currently
have xserver-xorg-core 2:1.18.3-1 xserver-xorg-video-ati 1:7.7.0-1 and kernel
4.5.1-1 . Unfortunately I can't "turn on" the external display connected to
the docking station -- screen blinks and comes back to display on the laptop,
xrandr reports xrandr: Configure crtc 4 failed and agd5f on IRC looking at
<a href="http://www.onerussian.com/tmp/dmesg-20160506-1.txt">http://www.onerussian.com/tmp/dmesg-20160506-1.txt</a> (attached to this report as
well) summarized as "link training failed on the display"</pre>
</div>
</p>
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