I removed telegram, skype, virtualbox, cool-retro-term packages & commented out sources (& apt autoremove);
I didn't expect issues with costales/anoise, and chose to ignore google/chrome or opera/stable Again tried to release-upgrade; again 3rd party packages error. I then removed ubuntu-mate-core & ubuntu-mate-desktop, and noted what was removed... added back redshift-gtk & wallpaper packages; apt autoremove Now the release-upgrade is downloading/installing... -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1930478 Title: upgrade 18.04 to 20.04; 3rd party packages To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1930478/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs