use 'ppa-purge' with each installed ppa, to get genuine package version. Then cleanup /etc/apt/sources.list to only use 'bionic' entries.
Also run 'gtkorphan' to purge old/un-needed packages; then reboot and update again. ** 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/1771852 Title: In update-manager I see error "no internet connection", but it isn't true. And update of Ubuntu is no possible for me To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1771852/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs