Red Hat Bugzilla – Bug 1463235
GNOME shell freezes when waking up docked
Last modified: 2017-06-22 09:14:57 EDT
Created attachment 1289625 [details]
Description of problem:
I'm running F26 on a Thinkpad X1 Yoga. Most of the time I am docked on a OneLink+ dock with two monitors and one monitor on DisplayPort (3 monitors total, interal display is disabled). Since about two weeks the following issue happens:
The notebook is running regulary without being docked. I just close the lid and the machine will go to standby (red Thinkpad light is flashing slowly). On my desk, I plug in the OneLink and the DisplayPort cable and wake up the machine. Now only one of the two OneLink monitors are turned on with a desktop background, other two (second OneLink and DP) are black. Also the shell is completly frozen, no mouse movement (neither touchpad, docked or attached mouse), keyboard input, I cannot even change TTY. Only a reboot helps. This worked properly a few weeks ago (I cannot remember which update caused this). CPU fan spins up so there seems to be high CPU utilization. I'm not sure how to debug this and which log could help.
Version-Release number of selected component (if applicable):
Everytime I wake up the machine docked on OneLink and DP.
Steps to Reproduce:
1. Put machine into standby (red Thinkpad light flashing)
2. Dock machine with OneLink+ dock and DP monitor
One of the OneLink displays turns on, desktop background and mouse cursor appears, but no response to any input. Loud CPU fan.
All three displays turn on, machine is responsible.
Similar issue, but maybe unrelated:
When attaching the OneLink-cable while the machine is running, everything works as expected (two OneLink monitors + internal display), desktop is reponsive. Now when I attach the additional display port cable (lid still open), every screen goes black. I cannot recover from this, even with un-/redocking. Machine seems to be alive since un-/redocking generates a sound, but only a reboot helps.
Interesting: Freeze happens only when I turn on my monitors. Waking up docked with displays turned off seems to work.