Today I have a problem with my Kubuntu, that after i have apply my password for my user, I just got a blank page, only with the standard background of Kubuntu.

I found that I couldn’t start KDE, with the command startkde in the console, I don’t know how, but i was missing the apt-get packet name “kde-workspace-bin”

So I run this command:

sudo apt-get install kde-workspace-bin

Tips:  You can get into the console but holding down the following keys: CTRL ALT F1