Thank you for your report. Ubuntu 18.04 LTS is intended to upgrade to Ubuntu 18.10 (https://wiki.ubuntu.com/CosmicCuttlefish/ReleaseNotes) or to Ubuntu 20.04 LTS (after 20.04.1's release), ie. the next release or next LTS release.
If you read Ubuntu 19.04's release notes (https://wiki.ubuntu.com/DiscoDingo/ReleaseNotes) you'll note only mention of upgrading from Ubuntu 18.10 as this is all that's supported. For information on Ubuntu upgrade paths please see https://help.ubuntu.com/community/UpgradeNotes Bug reports on an untested and unsupported upgrade path make little sense, thus I've marked this bug report invalid. If you believe I'm in error, please change it back to new and give a reason why you believe it's valid. Thanks again for using Ubuntu. FYI: Yes it's likely you have non-Ubuntu packages in your system from a PPA as the error message suggests, but I'm not looking as you're attempting an unsupported upgrade anyway. PPA's are 3rd party & should ideally be removed prior to release-upgrade. ** 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/1860611 Title: xubuntu - cannot upgrade from 18.04 to 19.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1860611/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
