You have installed xorg pacakges from a PPA which is provided version numbers of the packages greater than those which appear in the official Ubuntu archive. You'll need to remove those packages using the tool ppa- purge before the upgrade will be able to be calculated.
** Changed in: ubuntu-release-upgrader (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1900148 Title: Bugreport on Update 20.04, not possible to update To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1900148/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs