I recently installed Kubuntu 14.04 and I installed available updates. Then, I got a black screen with mouse pointer visible. I lost my desktop. However I got to terminal with Ctrl+Alt+F1. Then I ran sudo apt-get install kubuntu-desktop. It gave me my desktop back.

Unfortunately, I found that some applications were broken and missing such as muon, dolphin, kontact, ktp-contactlist, etc. I tried several tips about package and apt commands. Nothing worked. sudo apt-get update and sudo apt-get upgrade did not solve the problem. Nothing was upgraded.

I could successfully installed dolphin by running sudo apt-get install dolphin. But I failed with muon and kontact. The below is what I tried for muon.

sithu@sithu-kubuntu:~$ sudo apt-get install muon

Reading package lists... Done

Building dependency tree       

Reading state information... Done

Some packages could not be installed. This may mean that you have

requested an impossible situation or if you are using the unstable

distribution that some required packages have not yet been created

or been moved out of Incoming.

The following information may help to resolve the situation:



The following packages have unmet dependencies:

muon : Depends: libmuonprivate2 (= 2.2.0-0ubuntu3) but it is not going to be installed

    Recommends: muon-updater but it is not going to be installed

E: Unable to correct problems, you have held broken packages.

I tried to install libmuonprivate2, but it depends on software-properties-kde.

sithu@sithu-kubuntu:~$ sudo apt-get install libmuonprivate2

Reading package lists... Done

Building dependency tree       

Reading state information... Done

Some packages could not be installed. This may mean that you have

requested an impossible situation or if you are using the unstable

distribution that some required packages have not yet been created

or been moved out of Incoming.

The following information may help to resolve the situation:



The following packages have unmet dependencies:

libmuonprivate2 : Depends: software-properties-kde but it is not going to be installed

E: Unable to correct problems, you have held broken packages.

I tried to install software-properties-kde, but it depends on python3-software-properties.

sithu@sithu-kubuntu:~$ sudo apt-get install software-properties-kde

Reading package lists... Done

Building dependency tree       

Reading state information... Done

Some packages could not be installed. This may mean that you have

requested an impossible situation or if you are using the unstable

distribution that some required packages have not yet been created

or been moved out of Incoming.

The following information may help to resolve the situation:



The following packages have unmet dependencies:

software-properties-kde : Depends: python3-software-properties (= 0.92.36) but 0.92.37.1 is to be installed

E: Unable to correct problems, you have held broken packages.

I tried to install python3-software-properties, but it seems update-to-date.

sithu@sithu-kubuntu:~$ sudo apt-get install python3-software-properties

Reading package lists... Done

Building dependency tree       

Reading state information... Done

python3-software-properties is already the newest version.

0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

I also tried to locate and re-install broken packages using Synaptic Package Manager, but no luck. Applying the changes gave me this dialog:

Could not apply changes!

Fix broken packages first.

"Fix broken packages" gave me this dialog:

E: Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.

E: Unable to correct dependencies

Any help would be highly appreciated.