You have packages from kisak-mesa ppa. Please ppa-purge them before upgrade. Does it help?
** Changed in: ubuntu-release-upgrader (Ubuntu) Status: New => Incomplete ** Tags added: third-party-packages -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1906456 Title: Unable to upgrade to 20.04.1 LTS and have tried common fixes To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1906456/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs