<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 - Laptop stopped automatically switching from docking station video to standalone and back"
href="https://bugs.freedesktop.org/show_bug.cgi?id=97818">97818</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Laptop stopped automatically switching from docking station video to standalone and back
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
<tr>
<th>Version</th>
<td>XOrg git
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</td>
</tr>
<tr>
<th>OS</th>
<td>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>giacecco@dico.im
</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>I believe the issue is related in some way to the Linux kernel - as I could
test 4.7.2-201 vs 4.6.7-300 on the same laptop and the latter version has no
issues - but the people on Linux kernel's bugzilla bounced me away and asked to
post here instead (<a href="https://bugzilla.kernel.org/show_bug.cgi?id=156781">https://bugzilla.kernel.org/show_bug.cgi?id=156781</a>).
The following has been tested using Fedora 24 on a Thinkpad T450s (Intel Core
i7-5600U, Intel HD Graphics 5500).The docking station is Lenovo's "90 W Pro
Dock", connected to a Dell UltraSharp U2913WM monitor. The laptop is configured
to ignore if the lid is closed.
To reproduce the issue:
a) turn on laptop connected to docking station with the lid closed, and proceed
until logging into Gnome
b) "hot-undock" from the docking station and open the lid
In kernels up to 4.6.7-300 the display automatically has switched to the
laptop's.
In kernel 4.7.2-201 nothing happens and the laptop's display is dark, as if the
laptop was still trying to use the monitor connected to the docking station.
c) close the lid (this correctly does not suspend the laptop) and "hot-dock"
back to the docking station
In kernels up to 4.6.7-300 the display automatically switches back to the
external display.
In kernel 4.7.2-201 the behaviour is erratic. Sometimes it activates the
external display back, some other time it does but the resolution is wrong etc.
The Xorg packages versions are:
$ sudo dnf list installed | grep xorg
abrt-addon-xorg.x86_64 2.8.2-1.fc24
@@commandline
xorg-x11-drv-ati.x86_64 7.6.1-3.20160215gitd41fccc.fc24
xorg-x11-drv-evdev.x86_64 2.10.3-1.fc24
@@commandline
xorg-x11-drv-fbdev.x86_64 0.4.3-24.fc24
@@commandline
xorg-x11-drv-intel.x86_64 2.99.917-24.20160712.fc24
@@commandline
xorg-x11-drv-libinput.x86_64 0.19.0-2.fc24
@@commandline
xorg-x11-drv-nouveau.x86_64 1:1.0.12-4.fc24
@@commandline
xorg-x11-drv-openchrome.x86_64 0.5.0-1.fc24
@@commandline
xorg-x11-drv-qxl.x86_64 0.1.4-7.fc24
@@commandline
xorg-x11-drv-synaptics.x86_64 1.8.3-2.fc24
@@commandline
xorg-x11-drv-vesa.x86_64 2.3.2-24.fc24
@@commandline
xorg-x11-drv-vmmouse.x86_64 13.1.0-3.fc24
@@commandline
xorg-x11-drv-vmware.x86_64 13.0.2-11.20150211git8f0cf7c.fc24
xorg-x11-drv-wacom.x86_64 0.32.0-2.fc24
@@commandline
xorg-x11-font-utils.x86_64 1:7.5-31.fc24
@@commandline
xorg-x11-fonts-Type1.noarch 7.5-16.fc24
@@commandline
xorg-x11-proto-devel.noarch 7.7-19.fc24
@@commandline
xorg-x11-server-Xorg.x86_64 1.18.4-4.fc24 @updates
xorg-x11-server-Xwayland.x86_64 1.18.4-4.fc24 @updates
xorg-x11-server-common.x86_64 1.18.4-4.fc24 @updates
xorg-x11-server-utils.x86_64 7.7-19.fc24
@@commandline
xorg-x11-utils.x86_64 7.5-21.fc24
@@commandline
xorg-x11-xauth.x86_64 1:1.0.9-5.fc24
@@commandline
xorg-x11-xinit.x86_64 1.3.4-11.fc24
@@commandline
xorg-x11-xkb-utils.x86_64 7.7-17.fc24
@@commandline
$
Other notes:
- the issue can be reproduced also starting with the laptop undocked
- when having the issue, suspending the laptop and waking it back up sends the
video to the correct display
- after having the issue, shutting down hangs on 4.7.2-201 but completes
successfully with 4.6.7-300
Sorry if I did not attach any log files etc. but I'm a noob and I wouldn't know
where to start, but please ask and I will try to provide you with what you
need.</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 the assignee for the bug.</li>
<li>You are on the CC list for the bug.</li>
</ul>
</body>
</html>