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.
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-shell in Ubuntu. https://bugs.launchpad.net/bugs/1777427 Title: Locking screen takes 10+ secs (after hit SUPER + L) Status in gnome-shell package in Ubuntu: Incomplete Bug description: 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 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1777427/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
