Thanks, Alex. Looking at VarLogDistupgradeMainlog.txt, I can see that need_server_mode() is returning true the third time it's called, and this leads to DistUpgradeController.calcDistUpgrade trying to read DistUpgradeController.tasks later on. But, DistUpgradeController.tasks would only be assigned if need_server_mode() had been true much earlier in the process.
That piece should be easy to fix, but I think the real issue is that 'ubuntu-desktop' is ostensibly not installed at that phase. ** Tags added: rls-jj-incoming -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1969786 Title: Upgrade from 20.04 to 22.04 failed To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1969786/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
