The key combo was changed to Super+L and it seems to work at least in 18.04 onward.
** Tags removed: artful ** Changed in: gnome-shell (Ubuntu) Status: Incomplete => Fix Released ** Changed in: gnome-settings-daemon (Ubuntu) Status: Incomplete => Fix Released -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1389650 Title: Ctrl+Alt+L fails to lock the screen in the default setup of Gnome 3 (gnome shell) To manage notifications about this bug go to: https://bugs.launchpad.net/gnome-settings-daemon/+bug/1389650/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs