I believe that this may have happened to me with ppa:oibaf/graphics- drivers
$ sudo ppa-purge ppa:oibaf/graphics-drivers Updating packages lists PPA to be removed: oibaf graphics-drivers Warning: Could not find package list for PPA: oibaf graphics-drivers $ In this case, the ppa exists for newer releases of ubuntu but the support for bionic has been removed. In any case, I am stuck with packages that were installed via the ppa but I have no way to revert them to official package types. This seems to prevent do-release- upgrade from completing. See also: https://answers.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+question/696223 https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1920829 https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1069133 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1855681 Title: Cannot purge a removed ppa To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ppa-purge/+bug/1855681/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
