Hi! It seems like you've installed 3rd party drivers. Please remove them and see if the upgrade succeeds then.
Quoting https://launchpad.net/~oibaf/+archive/ubuntu/graphics-drivers === Upgrading to a newer Ubuntu === It is *strongly* suggested to remove all packages from this PPA before updating to a newer Ubuntu release. See the section "Revert to original drivers" later on. Then, after the upgrade, you can add again this PPA. === Revert to original drivers === To revert to standard Ubuntu drivers type the following in a prompt shell: $ sudo apt-get install ppa-purge $ sudo ppa-purge ppa:oibaf/graphics-drivers ** 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/1807376 Title: can not upgrade to release 18.04 from 16.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1807376/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
