Please note that Kubuntu 14.04 LTS is no longer supported: https://wiki.ubuntu.com/Releases
The Ubuntu community documentation describes a means of upgrading from an EOL release: https://help.ubuntu.com/community/EOLUpgrades The technical reason your upgrade attempt failed is that due to a combination of unsupported third party packages, some of which have no upgrade path, no upgrade appears possible. Removing third party APT repositories and downgrading to Ubuntu 14.04 versions / removing packages not available in 14.04 may put this system into a situation where an upgrade can succeed. A better recommendation is a fresh installation. Summing up, this is not a bug, but a support issue. Extended support for Ubuntu 14.04 LTS is available from Canonical: https://www.ubuntu.com/esm Community support for EOL upgrades may be available from volunteers: https://www.ubuntu.com/support/community-support ** 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/1829767 Title: LTS Upgrade from Ubuntu 14.04 to 16.04 failed To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1829767/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
