@CarlosRenĂȘ: As described above, there exists a patch for gtk. I described this in my answer on askubuntu: https://askubuntu.com/a/1544292 . In short:
Create the patch print_dialog_without_avahi_discovered_printers.patch : --- a/modules/printbackends/cups/gtkprintbackendcups.c +++ b/modules/printbackends/cups/gtkprintbackendcups.c @@ -4008,7 +4008,7 @@ g_source_set_name_by_id (cups_backend->list_printers_poll, "[gtk+] cups_request_printer_list"); } - avahi_request_printer_list (cups_backend); + // Do NOT add random network printers! avahi_request_printer_list (cups_backend); } } And reinstall gtk: sudo apt build-dep libgtk-3-dev apt source libgtk-3-dev cd $(find gtk* -maxdepth 0 -type d) git apply --reject --whitespace=fix ../print_dialog_without_avahi_discovered_printers.patch debuild -b -us -uc --no-pre-clean cd .. sudo apt install --reinstall ./libgtk-3-0_*.deb # do not update (dist-upgrade) # sudo apt-mark hold libgtk-3-0 -- 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/1753509 Title: avahi-daemon adds/installs every printer on network Status in cups package in Ubuntu: Triaged Bug description: When connected to a network, avahi-daemon adds & installs all printer on a network without being prompted. This is not desired behaviour. Discovery of the printers is good, but not automatic installation & addition. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: avahi-daemon 0.6.32~rc+dfsg-1ubuntu2 ProcVersionSignature: Ubuntu 4.13.0-36.40~16.04.1-generic 4.13.13 Uname: Linux 4.13.0-36-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.15 Architecture: amd64 CurrentDesktop: Unity Date: Mon Mar 5 09:29:05 2018 InstallationDate: Installed on 2017-09-29 (157 days ago) InstallationMedia: Ubuntu 16.04.3 LTS "Xenial Xerus" - Release amd64 (20170801) ProcEnviron: LANGUAGE=en_US PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: avahi UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/cups/+bug/1753509/+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