I got a Bionic ISO and run it in a virtual machine. Enabled proposed and now upgrading update-manager forces the installation of a newer ubuntu-advantage-tools:
---> $ sudo apt install update-manager --verbose-versions Reading package lists... Building dependency tree... Reading state information... The following additional packages will be installed: python3-update-manager (1:18.04.11.23) ubuntu-advantage-tools (31.1~18.04) ubuntu-pro-client (31.1~18.04) ubuntu-pro-client-l10n (31.1~18.04) update-manager-core (1:18.04.11.23) The following NEW packages will be installed: ubuntu-pro-client (31.1~18.04) ubuntu-pro-client-l10n (31.1~18.04) The following packages will be upgraded: python3-update-manager (1:18.04.11.13 => 1:18.04.11.23) ubuntu-advantage-tools (27.2.2~18.04.1 => 31.1~18.04) update-manager (1:18.04.11.13 => 1:18.04.11.23) update-manager-core (1:18.04.11.13 => 1:18.04.11.23) 4 upgraded, 2 newly installed, 0 to remove and 376 not upgraded. Need to get 820 kB of archives. After this operation, 1,570 kB disk space will be freed. Do you want to continue? [Y/n] <--- I confirm then that launching and finishing update-manager without internet connection produces no error any more. ** Tags removed: verification-needed-bionic ** Tags added: verification-done-bionic -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2049785 Title: /usr/bin/update-manager:json.decoder.JSONDecodeError:/bin/update- manager@118:start_update:start_available:refresh_cache:_get_ua_security_status:load:loads:decode:raw_decode To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/update-manager/+bug/2049785/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
