This may have something to do with the following PPA which you have installed packages from:
https://launchpad.net/~graphics-drivers/+archive/ubuntu/ppa Please use the tool 'ppa-purge' from the package 'ppa-purge' to remove this PPA and restore the packages to the official Ubuntu version and try the upgrade again. ** 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/1779533 Title: upgrade from 17.10 to 18.04 fails before starting. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1779533/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
