I've just installed kubuntu 12.04 but I've got a problem here. When I login it shows the starting splash screen of KDE but when it gets to the fourth icon it stops and the screen goes black, only showing the mouse pointer. I'd really like to test this distro, any ideas?
Strike CtrlAltF1 to logon to the text console.
Check this thread: Can not get passed the login screen.
Strike CtrlAltF7 to logon to return to your graphics console.