Try to reset /org/mate/marco/keybinding-commands/command-1 to default value
$ dconf reset /org/mate/marco/keybinding-commands/command-1 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1728880 Title: Cannot lock screen due Unknown option -lock To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-mate-settings/+bug/1728880/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
