Here is the tail of /var/log/syslog when I try and fail to select Canonical Partners"
Apr 23 21:52:20 mycomputer gnome-shell[1932]: pushModal: invocation of begin_modal failed Apr 23 21:52:20 mycomputer gnome-shell[1932]: polkitAuthenticationAgent: Failed to show modal dialog. Dismissing authentication request for action-id com.ubuntu.softwareproperties.applychanges cookie 2-23574a46bd8318158fe3dd4ecc52a32a-5-c93d2ab7373f92c6fc2f3db033d3eb15 Apr 23 21:52:20 mycomputer software-properties-gtk.desktop[1932]: ERROR:root:Authentication canceled, changes have not been saved Apr 23 21:52:27 mycomputer systemd[1675]: tracker-extract.service: Succeeded. Apr 23 21:52:44 mycomputer gnome-shell[1932]: pushModal: invocation of begin_modal failed Apr 23 21:52:44 mycomputer gnome-shell[1932]: polkitAuthenticationAgent: Failed to show modal dialog. Dismissing authentication request for action-id com.ubuntu.softwareproperties.applychanges cookie 2-23574a46bd8318158fe3dd4ecc52a32a-6-665483d7b8251faa59df638e0cb38a3f Apr 23 21:52:44 mycomputer software-properties-gtk.desktop[1932]: ERROR:root:Authentication canceled, changes have not been saved Apr 23 21:52:55 mycomputer gnome-shell[1932]: pushModal: invocation of begin_modal failed Apr 23 21:52:55 mycomputer gnome-shell[1932]: polkitAuthenticationAgent: Failed to show modal dialog. Dismissing authentication request for action-id com.ubuntu.softwareproperties.applychanges cookie 2-23574a46bd8318158fe3dd4ecc52a32a-7-447f164721374873942ad295e4688bff Apr 23 21:52:55 mycomputer software-properties-gtk.desktop[1932]: ERROR:root:Authentication canceled, changes have not been saved -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1825590 Title: "software & updates" freezes after selecting "canonical partners¨ To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/software-properties/+bug/1825590/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs