This bug was fixed in updates a few weeks ago (bug 1769383). What version of package 'gnome-shell-extension-ubuntu-dock' are you using?
Also, please run this command to send us more information about the system: apport-collect 1817646 ** Changed in: gnome-shell (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-shell in Ubuntu. https://bugs.launchpad.net/bugs/1817646 Title: locking ubuntu doesn't work properly To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1817646/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs