I got a Xenial 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 ... The following packages will be upgraded: python3-update-manager (1:16.04.17 => 1:16.04.21) ubuntu-advantage-tools (10ubuntu0.16.04.1 => 31.2.2~16.04) update-manager (1:16.04.17 => 1:16.04.21) update-manager-core (1:16.04.17 => 1:16.04.21) <--- I confirm then that launching and finishing update-manager without internet connection produces no error any more. ** Tags removed: verification-needed verification-needed-xenial ** Tags added: verification-done verification-done-xenial -- 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
