`systemctl unmask ...` actually does not work. See this question on Ask Ubuntu and the selected answer (green check mark) for it
https://askubuntu.com/questions/804946/systemctl-how-to-unmask Seems to by a systemd bug. But note that this is not your original GNOME problem. That problem already existed before you ran `systemctl mask ...`. Please use `systemctl disable ...` if you want to de-activate a service for testing. -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-control-center in Ubuntu. https://bugs.launchpad.net/bugs/2083530 Title: gnome-control-center not able to add printer or make settings To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/cups/+bug/2083530/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
