I tested this on cosmic using the well written test case from the bug description and confirm that the fix works.
bdmurray@clean-cosmic-amd64:~$ tail -n1 /etc/update-manager/release-upgrades Prompt=lts bdmurray@clean-cosmic-amd64:~$ apt-cache policy ubuntu-release-upgrader-core ubuntu-release-upgrader-core: Installed: 1:18.10.11.4 Candidate: 1:18.10.11.4 Version table: *** 1:18.10.11.4 500 500 http://192.168.10.7/ubuntu cosmic-proposed/main amd64 Packages 500 http://192.168.10.7/ubuntu cosmic-proposed/main i386 Packages 100 /var/lib/dpkg/status 1:18.10.11.3 500 500 http://192.168.10.7/ubuntu cosmic-updates/main amd64 Packages 500 http://192.168.10.7/ubuntu cosmic-updates/main i386 Packages 1:18.10.11 500 500 http://192.168.10.7/ubuntu cosmic/main amd64 Packages 500 http://192.168.10.7/ubuntu cosmic/main i386 Packages bdmurray@clean-cosmic-amd64:~$ do-release-upgrade -d Checking for a new Ubuntu release There is no development version of an LTS available. To upgrade to the latest non-LTS develoment release set Prompt=normal in /etc/update-manager/release-upgrades. Although the error message does not appear to be so well written as it is missing a 'p'. I'm still setting it to verification-done though. ** Tags removed: verification-needed verification-needed-cosmic ** Tags added: verification-done verification-done-cosmic -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1798618 Title: confusing error message with 'do-release-upgrade -d' and Prompt=lts To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1798618/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs