Thanks for your report. You have this package: libgbm1 1:17.3.6-2~a~padoka0 which is not from an official ubuntu repository and is blocking the upgrade. Please install the official version from artful-updates and try to upgrade again.
I'm closing this report because it is not a bug with Ubuntu. Don't hesitate to file any but you may find. ** Changed in: ubuntu-release-upgrader (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1758885 Title: Upgrade to 18.04 is failing from 17.10 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1758885/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs