I had the same problem, unable to upgrade from 10.04 to 10.10 that resulted from having previously upgraded KDE. I preformed the suggested steps:
A alternative (and prefered way) to test is: $ bzr get lp:~ubuntu-core-dev/update-manager/maverick $ cd maverick/DistUpgrade $ sudo ./dist-upgrade Upgrade completed with no issues. Thanks. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/680088 Title: Upgrade fails "Can not mark 'kubuntu-desktop' for upgrade " -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs