ubuntu-15.04-desktop-amd64想要安装KDE桌面，结果出现如下问题

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.

有一些软件包无法被安装。如果您用的是 unstable 发行版，这也许是

因为系统无法达到您要求的状态造成的。该版本中可能会有一些您需要的软件

包尚未被创建或是它们已被从新到(Incoming)目录移出。

下列信息可能会对解决问题有所帮助：

 

下列软件包有未满足的依赖关系：

 kubuntu-desktop : 依赖: ark 但是它将不会被安装

                   依赖: dolphin 但是它将不会被安装

                   依赖: kde-window-manager

                   依赖: kde-workspace-bin 但是它将不会被安装

                   依赖: kdemultimedia-kio-plugins 但是它将不会被安装

                   依赖: kdepasswd 但是它将不会被安装

                   依赖: kdm 但是它将不会被安装

                   依赖: khelpcenter4 但是它将不会被安装

                   依赖: klipper 但是它将不会被安装

                   依赖: konsole 但是它将不会被安装

                   依赖: ksnapshot 但是它将不会被安装

                   依赖: ksysguard 但是它将不会被安装

                   依赖: language-selector-kde 但是它将不会被安装

                   依赖: okular 但是它将不会被安装

                   依赖: plasma-desktop 但是它将不会被安装

                   依赖: plasma-netbook 但是它将不会被安装

                   依赖: software-properties-kde 但是它将不会被安装

                   依赖: systemsettings 但是它将不会被安装

                   推荐: akregator 但是它将不会被安装

                   推荐: amarok 但是它将不会被安装

                   推荐: apport-kde 但是它将不会被安装

                   推荐: apturl-kde 但是它将不会被安装

                   推荐: bluedevil 但是它将不会被安装

                   推荐: dragonplayer 但是它将不会被安装

                   推荐: gstreamer0.10-qapt 但是它将不会被安装

                   推荐: gwenview 但是它将不会被安装

                   推荐: jockey-kde 但是它将不会被安装

                   推荐: k3b 但是它将不会被安装

                   推荐: kaccessible 但是它将不会被安装

                   推荐: kaddressbook 但是它将不会被安装

                   推荐: kamera 但是它将不会被安装

                   推荐: kate 但是它将不会被安装

                   推荐: kcalc 但是它将不会被安装

                   推荐: kde-config-touchpad 但是它将不会被安装

                   推荐: kdepim-kresources 但是它将不会被安装

                   推荐: kdepim-runtime 但是它将不会被安装

                   推荐: kdepim-strigi-plugins 但是它将不会被安装

                   推荐: kdesudo 但是它将不会被安装

                   推荐: kmag 但是它将不会被安装

                   推荐: kmail 但是它将不会被安装

                   推荐: kmousetool 但是它将不会被安装

                   推荐: knotes 但是它将不会被安装

                   推荐: kontact 但是它将不会被安装

                   推荐: kopete 但是它将不会被安装

                   推荐: korganizer 但是它将不会被安装

                   推荐: kpat 但是它将不会被安装

                   推荐: kppp 但是它将不会被安装

                   推荐: ksystemlog 但是它将不会被安装

                   推荐: ktimetracker 但是它将不会被安装

                   推荐: ktorrent 但是它将不会被安装

                   推荐: kubuntu-firefox-installer 但是它将不会被安装

                   推荐: kubuntu-notification-helper 但是它将不会被安装

                   推荐: kvkbd 但是它将不会被安装

                   推荐: kwalletmanager 但是它将不会被安装

                   推荐: libreoffice-kde 但是它将不会被安装

                   推荐: muon 但是它将不会被安装

                   推荐: muon-installer 但是它将不会被安装

                   推荐: muon-notifier 但是它将不会被安装

                   推荐: partitionmanager 但是它将不会被安装

                   推荐: plasma-widget-facebook 但是它将不会被安装

                   推荐: plasma-widget-networkmanagement 但是它将不会被安装

                   推荐: plasma-widgets-addons 但是它将不会被安装

                   推荐: polkit-kde-1 但是它将不会被安装

                   推荐: printer-applet 但是它将不会被安装

                   推荐: qapt-deb-installer 但是它将不会被安装

                   推荐: quassel 但是它将不会被安装

                   推荐: rekonq 但是它将不会被安装

                   推荐: system-config-printer-kde 但是它将不会被安装

                   推荐: usb-creator-kde 但是它将不会被安装

                   推荐: userconfig 但是它将不会被安装

E: 无法修正错误，因为您要求某些软件包保持现状，就是它们破坏了软件包间的依赖关系。