I copied a standard config file and it worked after that. It seems that particular update caused the conf file to become empty.
-- cups exits with "No valid Listen or Ports lines" https://bugs.launchpad.net/bugs/429138 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs