ubuntu-15.04-desktop-amd64想要安裝KDE桌面，結果出現以下問題

The following packages have unmet dependencies:
 kubuntu-desktop : Depends: ark but it is not going to be installed
                   Depends: audiocd-kio but it is not going to be installed
                   Depends: dolphin but it is not going to be installed
                   Depends: gstreamer0.10-qapt but it is not going to be installed
                   Depends: kde-window-manager but it is not going to be installed
                   Depends: kde-workspace but it is not going to be installed
                   Depends: kdepasswd but it is not going to be installed
                   Depends: khelpcenter4 but it is not going to be installed
                   Depends: klipper but it is not going to be installed
                   Depends: kmix but it is not going to be installed
                   Depends: konsole but it is not going to be installed
                   Depends: ksnapshot but it is not going to be installed
                   Depends: ksysguard but it is not going to be installed
                   Depends: lightdm-kde-greeter but it is not going to be installed
                   Depends: okular but it is not going to be installed
                   Depends: plasma-desktop but it is not going to be installed
                   Depends: plasma-netbook but it is not going to be installed
                   Depends: software-properties-kde but it is not going to be installed
                   Depends: systemsettings 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: apport-kde but it is not going to be installed
                   Recommends: apturl-kde but it is not going to be installed
                   Recommends: bluedevil but it is not going to be installed
                   Recommends: colord-kde but it is not going to be installed
                   Recommends: dragonplayer but it is not going to be installed
                   Recommends: gwenview but it is not going to be installed
                   Recommends: k3b but it is not going to be installed
                   Recommends: kaccessible but it is not going to be installed
                   Recommends: kaddressbook but it is not going to be installed
                   Recommends: kamera but it is not going to be installed
                   Recommends: kate but it is not going to be installed
                   Recommends: kcalc but it is not going to be installed
                   Recommends: kde-baseapps-bin but it is not going to be installed
                   Recommends: kde-telepathy 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: kdesudo but it is not going to be installed
                   Recommends: kmag but it is not going to be installed
                   Recommends: kmail but it is not going to be installed
                   Recommends: kmousetool 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: kscreen 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: kubuntu-docs but it is not going to be installed
                   Recommends: kubuntu-notification-helper but it is not going to be installed
                   Recommends: kwalletmanager but it is not going to be installed
                   Recommends: libreoffice-base but it is not going to be installed
                   Recommends: libreoffice-kde but it is not going to be installed
                   Recommends: libreoffice-style-oxygen but it is not going to be installed
                   Recommends: muon-discover but it is not going to be installed
                   Recommends: muon-notifier but it is not going to be installed
                   Recommends: partitionmanager but it is not going to be installed
                   Recommends: plasma-nm but it is not going to be installed
                   Recommends: plasma-runner-telepathy-contact but it is not going to be installed
                   Recommends: plasma-widgets-addons but it is not going to be installed
                   Recommends: polkit-kde-1 but it is not going to be installed
                   Recommends: print-manager but it is not going to be installed
                   Recommends: qapt-deb-installer but it is not going to be installed
                   Recommends: quassel but it is not going to be installed
                   Recommends: skanlite but it is not going to be installed
                   Recommends: ttf-punjabi-fonts but it is not going to be installed
                   Recommends: usb-creator-kde but it is not going to be installed
                   Recommends: user-manager but it is not going to be installed
E: Unable to correct problems, you have held broken packages.

 

有一些軟件包沒法被安裝。若是您用的是 unstable 發行版，這也許是

由於系統沒法達到您要求的狀態形成的。該版本中可能會有一些您須要的軟件

包還沒有被建立或是它們已被重新到(Incoming)目錄移出。

下列信息可能會對解決問題有所幫助：

 

下列軟件包有未知足的依賴關係：

 kubuntu-desktop : 依賴: ark 可是它將不會被安裝

                   依賴: dolphin 可是它將不會被安裝

                   依賴: kde-window-manager

                   依賴: kde-workspace-bin 可是它將不會被安裝

                   依賴: kdemultimedia-kio-plugins 可是它將不會被安裝

                   依賴: kdepasswd 可是它將不會被安裝

                   依賴: kdm 可是它將不會被安裝

                   依賴: khelpcenter4 可是它將不會被安裝

                   依賴: klipper 可是它將不會被安裝

                   依賴: konsole 可是它將不會被安裝

                   依賴: ksnapshot 可是它將不會被安裝

                   依賴: ksysguard 可是它將不會被安裝

                   依賴: language-selector-kde 可是它將不會被安裝

                   依賴: okular 可是它將不會被安裝

                   依賴: plasma-desktop 可是它將不會被安裝

                   依賴: plasma-netbook 可是它將不會被安裝

                   依賴: software-properties-kde 可是它將不會被安裝

                   依賴: systemsettings 可是它將不會被安裝

                   推薦: akregator 可是它將不會被安裝

                   推薦: amarok 可是它將不會被安裝

                   推薦: apport-kde 可是它將不會被安裝

                   推薦: apturl-kde 可是它將不會被安裝

                   推薦: bluedevil 可是它將不會被安裝

                   推薦: dragonplayer 可是它將不會被安裝

                   推薦: gstreamer0.10-qapt 可是它將不會被安裝

                   推薦: gwenview 可是它將不會被安裝

                   推薦: jockey-kde 可是它將不會被安裝

                   推薦: k3b 可是它將不會被安裝

                   推薦: kaccessible 可是它將不會被安裝

                   推薦: kaddressbook 可是它將不會被安裝

                   推薦: kamera 可是它將不會被安裝

                   推薦: kate 可是它將不會被安裝

                   推薦: kcalc 可是它將不會被安裝

                   推薦: kde-config-touchpad 可是它將不會被安裝

                   推薦: kdepim-kresources 可是它將不會被安裝

                   推薦: kdepim-runtime 可是它將不會被安裝

                   推薦: kdepim-strigi-plugins 可是它將不會被安裝

                   推薦: kdesudo 可是它將不會被安裝

                   推薦: kmag 可是它將不會被安裝

                   推薦: kmail 可是它將不會被安裝

                   推薦: kmousetool 可是它將不會被安裝

                   推薦: knotes 可是它將不會被安裝

                   推薦: kontact 可是它將不會被安裝

                   推薦: kopete 可是它將不會被安裝

                   推薦: korganizer 可是它將不會被安裝

                   推薦: kpat 可是它將不會被安裝

                   推薦: kppp 可是它將不會被安裝

                   推薦: ksystemlog 可是它將不會被安裝

                   推薦: ktimetracker 可是它將不會被安裝

                   推薦: ktorrent 可是它將不會被安裝

                   推薦: kubuntu-firefox-installer 可是它將不會被安裝

                   推薦: kubuntu-notification-helper 可是它將不會被安裝

                   推薦: kvkbd 可是它將不會被安裝

                   推薦: kwalletmanager 可是它將不會被安裝

                   推薦: libreoffice-kde 可是它將不會被安裝

                   推薦: muon 可是它將不會被安裝

                   推薦: muon-installer 可是它將不會被安裝

                   推薦: muon-notifier 可是它將不會被安裝

                   推薦: partitionmanager 可是它將不會被安裝

                   推薦: plasma-widget-facebook 可是它將不會被安裝

                   推薦: plasma-widget-networkmanagement 可是它將不會被安裝

                   推薦: plasma-widgets-addons 可是它將不會被安裝

                   推薦: polkit-kde-1 可是它將不會被安裝

                   推薦: printer-applet 可是它將不會被安裝

                   推薦: qapt-deb-installer 可是它將不會被安裝

                   推薦: quassel 可是它將不會被安裝

                   推薦: rekonq 可是它將不會被安裝

                   推薦: system-config-printer-kde 可是它將不會被安裝

                   推薦: usb-creator-kde 可是它將不會被安裝

                   推薦: userconfig 可是它將不會被安裝

E: 沒法修正錯誤，由於您要求某些軟件包保持現狀，就是它們破壞了軟件包間的依賴關係。