So first, please try to do as described in the question I linked (this is the text from there but "translated" to CUPS):
----- First check that the unit file is a symlink to /dev/null file /lib/systemd/system/cups.service it should return: /lib/systemd/system/cups.service: symbolic link to /dev/null in which case, delete it sudo rm /lib/systemd/system/cups.service Since you changed a unit file, you need to run this: sudo systemctl daemon-reload now check the status: systemctl status cups if it doesn't say loaded and running (if the circle is still red), reinstall the package: sudo apt-get install --reinstall cups-daemon and reload the (systemd) daemon again sudo systemctl daemon-reload and check status once more systemctl status cups ----- It seems that "systemctl mask ..." eliminates a file installed from a package completely from the system. Here you should report a bug on the systemd package. Once done the commands above you should have recovered your system to what it was right after the update. You should reboot then and after that check again whether you are in the original state (GNOME -> does not correctly communicate with CUPS, non-GNOME -> all printing-related works correctly) and then we need to investigate the GNOME issue. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to cups in Ubuntu. https://bugs.launchpad.net/bugs/2083530 Title: gnome-control-center not able to add printer or make settings Status in cups package in Ubuntu: Incomplete Status in gnome-control-center package in Ubuntu: Incomplete Bug description: don't know why, but i'm no more able to add a printer or make specific settings and also unable to remove it. Now i must switch to another app which is able to do that all. By the way: why i see my printer twice? It's in fact installed once only. Sorry, German GUI: https://ibb.co/Sfxz7nY This is from the alternate app which don't have this problem (KDE-System-Einstellungen): https://ibb.co/0CFmpwx If you need special informations, please advice, i will provide it. Oh: I'm on Ubuntu 24.04.1 LTS (AMD 64) and gnome-control-center from store in version 46.0.1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/cups/+bug/2083530/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp