This is still an issue: Just started the disco -> eoan upgrade through the GUI prompt I got, which broke on, I think, the second step (setting up software sources IIRC). A systray icon showed up saying there was a problem with the package manager (saying 'disco', which I have now configured as the default-release, is not a valid distribution).
What seems to have happened is the sources.list was updated, replacing disco with eoan sources, breaking because the default-release is no longer available. I tried updating the default-release afterwards, so my system now shows a lot of pending package updates, but I cannot retry the release upgrade since there are pending updates. Instead, I reverted the changes to sources.list (replacing eoan with disco again), removed my default-release, which allowed starting the release upgrade process again and now actually started the upgrade. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1827741 Title: APT::Default-Release breaks distribution upgrade To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1827741/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
