I looked at some screen shots of Kubuntu and I liked it so I went to Synaptic and installed the kubuntu-desktop package and set my desktop window manager to kde and rebooted.

After reboot, I saw Kubuntu splash screen then this message; running in Low Graphical Mode.

Then I was not able to dismiss the message because my mouse did not work

Seemingly How to Geek had the same problem http://www.howtogeek.com/howto/ubuntu/install-kde-kubuntu-on-ubuntu/ .

You will probably see that your xorg.conf file was backed up to xorg.conf.1 during the ?>KDE / Kubuntu installation. Just copy the xorg.conf.1 back to xorg.conf, reboot, and >everything should be fine.

I also tried to do that by booting into recovery mode and then droping onto the shell. But it would not let me rename, came up with some error.