OS: Ubuntu 14.04
When installing a ubuntu desktop KDE, some error like “unable to correct problems you have held broken packages” happen. So I finally found the problm is the package python3-software-properties is too new and can’t be compatible with the kde package. The soluation is follling:
sudo apt-get remove python3-software-properties
sudo apt-get install python3-software-properties=0.92.36
