For those users who want to install the kubuntu-desktop package with Quantal stack coming from Ubuntu 12.04.2 the following did the trick for me:
sudo apt-get install kubuntu-desktop xserver-xorg-lts-quantal libgl1-mesa-glx-lts-quantal libgbm1-lts-quantal kde-window-manager
For those users who want to install the kubuntu-desktop package with Quantal stack coming from Ubuntu 12.04.2 the following did the trick for me:
sudo apt-get install kubuntu-desktop xserver- xorg-lts- quantal libgl1- mesa-glx- lts-quantal libgbm1-lts-quantal kde-window-manager