Locking screen takes 10+ secs (after hit SUPER + L)

[Vojtěch Dušátko]

System visually locks screen between 10 and 12 secs after hitting Super + L or pressing Lock button. This ~10 secs I can move with pointer and view what was on screen but clicking on whatever is not possible.
And when I waking up my Laptop from sleep that happens too

Report Type: Bug
Description: Ubuntu 18.04 LTS
Package: gdm3:
           Installed: 3.28.2-0ubuntu1.2
           Candidate: 3.28.2-0ubuntu1.2
Uname: Linux 4.15.0-23-generic
Architecture: x86_64

[Daniel van Vugt (vanvugt)]

Please open a terminal window and run:

  journalctl -f

Note the latest time at the bottom of the window, then lock the screen. Wait for it to eventually complete, then unlock. Now take a screenshot of new messages that appeared in that window during the lock and send it to us.

[Vojtěch Dušátko (vojta.d)]

I found that it's could be because overloaded Intel HD 4000. It's happening only when I have many windows (10+) opened on many (3+) workspaces and second monitor is connected. After boot it's not happening now.

[Vojtěch Dušátko (vojta.d)]

There is a log of locking and unlocking from "journalctl -f" when it happens

[Daniel van Vugt (vanvugt)]

Thanks, but that log covers 35 seconds so it's hard to tell... Can you say which time is before the bug and which is after?

[Launchpad Janitor (janitor)]

[Expired for gnome-shell (Ubuntu) because there has been no activity for 60 days.]