Red Hat Bugzilla – Bug 1276971
External monitor not detected on resume if machine suspended/undocked/resumed/suspended/re-docked/resumed.
Last modified: 2016-12-20 10:17:46 EST
Created attachment 1088420 [details]
xrandr -q --verbose output
Description of problem:
Thinkpad X250 with UltraDock: Monitor connected over DisplayPort is not detected when resuming from sleep. Has to be unplugged/plugged back in, then layout has to be entered again.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Machine is docked and running, layout has been configured as intended (see attached xrandr output).
2. Enter suspend.
4. Resume, do some work.
7. Open lid to resume.
Machine resumes but external monitor remains off. To get the monitor to work properly I have to unplug it from the UltraDock and plug it back in. Then I have to also adjust the layout since the monitor is to the left of the laptop - opposite of the default layout.
External monitor should be turned on and to the last configured layout.
I also still get this both at home with a display port screen connected to an Ultra Dock with a T440s as well as at work with a HDMI screen connected to the same. Only work around is to first open the notebook screen, log in and re-enumerate all attached screens. Unfortunately the layout and virtual desktop contents gets completely trashed. Real annoying!
I am fighting this now since more than one year. F20, F21, F22, F23 and still counting.
Are we really unable to get this working?
Update with version 2.99.917-18.20151109.fc23:
That makes this worse, in that disconnecting/reconnecting the external monitor has no effect: It's missing from "xrandr -q" output.
BTW, the GDM VT (running on wayland) does detect the new monitor.
*** Bug 1288791 has been marked as a duplicate of this bug. ***
I see similar behavior using DVI-D, except it remembers the layout.
This seems to have been fixed sometime in the last 2 weeks.
Unfortunately I have not noticed any improvement lately. On the contrary it now even automatically enters suspend upon logging in, WAPOC!
Created attachment 1120366 [details]
Full journal still showing issue with latest 4.3.4-300.fc23.x86_64 kernel
Unfortunately I still see this with latest updates and 4.3.4-300.fc23.x86_64 kernel on my Lenovo ThinkPad T440s with an UltraDock and HDMI screen. Attached journal has been complemented with => remarks about whether or not a suspend was legit. This is really highly annoying especially as any application geometry and virtual desktop settings are completely lost due to this!
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