The error seems to be that the mirror that is used for main, restricted and universe gets deactivated:
$ cat /etc/apt/sources.list # deb http://ubuntu.simplyroot.de/ubuntu precise main restricted universe # Bei Aktualisierung zu precise deaktiviert # deb http://ubuntu.simplyroot.de/ubuntu lucid-updates main restricted universe # Bei Aktualisierung zu precise deaktiviert # deb http://ubuntu.simplyroot.de/ubuntu lucid-security main restricted universe # Bei Aktualisierung zu precise deaktiviert deb http://de2.archive.ubuntu.com/ubuntu precise multiverse deb http://de2.archive.ubuntu.com/ubuntu precise-updates multiverse deb http://de2.archive.ubuntu.com/ubuntu precise-security multiverse deb http://de2.archive.ubuntu.com/ubuntu precise-backports main restricted universe multiverse -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/964812 Title: release upgrade failed because of missing essential package ubuntu- minimal To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/update-manager/+bug/964812/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
