Just want to add that this problem is the same without selecting "Detect LAN printers", so it has not to do with the LAN, as suggested in the original description.
** Bug 39604 has been marked a duplicate of this bug -- gnome-cups-add takes ages to load. https://launchpad.net/malone/bugs/26679 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
