<html>
<head>
<base href="https://bugs.freedesktop.org/" />
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Lenovo X1 OneLink Pro Dock + Lenovo 4k monitor fail"
href="https://bugs.freedesktop.org/show_bug.cgi?id=92308">92308</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Lenovo X1 OneLink Pro Dock + Lenovo 4k monitor fail
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
<tr>
<th>Version</th>
<td>DRI git
</td>
</tr>
<tr>
<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux (All)
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Component</th>
<td>DRM/Intel
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>benh@kernel.crashing.org
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr></table>
<p>
<div>
<pre>Machine: Lenovo X1 Gen 3 with OneLink Pro dock
Monitor: Lenovo 4k monitor "Pro 2480mD"
If I connect the monitor using the X1's built-in mini-DP with a DP1.2
compatible mini-DP to DP cable, things work fine (more/less, the monitor
sometimes fails to come back from idle blanking but I'll file that as a
separate issue).
If I connect the monitor to the dock using the DP-DP cable coming with the
monitor, the monitor doesn't sync. It displays an error about no sync. dmesg
fills up with error messages from the driver which I will attach.
$ uname -a
Linux pasglop 4.3.0-rc4+ #1 SMP Tue Oct 6 11:46:15 AEDT 2015 x86_64 x86_64
x86_64 GNU/Linux
git head is 1ff47c81ae9fcf16e40292478b7dd8c1d68130c1 from the drm-intel git
tree
using the nightly branch.
If I use xrandr to use a lower resolution (1080p for example), I had it working
once or twice. I tried to use 4k at 30Hz but that resulted in a driver crash
taking out the internal panel as well (reproduceable) with a previous 4.3-rc
kernel.
I will update this with more tests of the above using this latest kernel.</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are the QA Contact for the bug.</li>
<li>You are on the CC list for the bug.</li>
<li>You are the assignee for the bug.</li>
</ul>
</body>
</html>