The following packages have unmet dependencies:
 kubuntu-desktop : Depends: dolphin but it is not going to be installed
                   Depends: ksnapshot but it is not going to be installed
                   Depends: okular but it is not going to be installed
                   Recommends: akregator but it is not going to be installed
                   Recommends: amarok but it is not going to be installed
                   Recommends: apturl-kde but it is not going to be installed
                   Recommends: baloo-utils but it is not going to be installed
                   Recommends: k3b but it is not going to be installed
                   Recommends: kaddressbook but it is not going to be installed
                   Recommends: kdepim-kresources but it is not going to be installed
                   Recommends: kdepim-runtime but it is not going to be installed
                   Recommends: kmail but it is not going to be installed
                   Recommends: knotes but it is not going to be installed
                   Recommends: kontact but it is not going to be installed
                   Recommends: korganizer but it is not going to be installed
                   Recommends: krdc but it is not going to be installed
                   Recommends: ksystemlog but it is not going to be installed
                   Recommends: ktorrent but it is not going to be installed
                   Recommends: libreoffice-base but it is not going to be installed
                   Recommends: libreoffice-calc but it is not going to be installed
                   Recommends: libreoffice-impress but it is not going to be installed
                   Recommends: libreoffice-kde but it is not going to be installed
                   Recommends: libreoffice-writer but it is not going to be installed
                   Recommends: skanlite but it is not going to be installed
E: Unable to correct problems, you have held broken packages.