In my case, problem is with phython minimal and nouveau graphic deiver. simply uninstalled them and run do-release-upgrade -d solved my issue.
Removing phython minimal resulted in non of the genome software installed properly. But Ubuntu 20.04 upgrade manager is badly broken. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1898332 Title: do release upgrade from Ubuntu 18.04 to 20.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1898332/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
