Reviewing the files from your upgrade attempt you seem to have enabled a PPA that provides sane packages. This will prevent the upgrade as that PPA contains package version numbers greater than the release to which you are upgrading. You can revert the PPA by installing the ppa-purge package from the official Ubuntu archive and then running 'sudo ppa- purge ppa:sane-project/sane-git' or 'sudo ppa-purge ppa:sane-project /sane-release' . After that you can try upgrading again and if it still fails open a new bug report. Thanks and good luck!
** Summary changed: - Upgrade 18.04 --> 20.04 fails + Upgrade 18.04 --> 20.04 fails if using a PPA providing sane packages -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1899000 Title: Upgrade 18.04 --> 20.04 fails if using a PPA providing sane packages To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1899000/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
