I installed KDE on Ubuntu 12.04 and everything went smooth.
When I restarted my computer so the changes would take place I could no longer login. I don't understand what happened.
on 11/06/2012 – Made popular on 11/06/2012
I have installed ubuntu 12.04 on VMWARE Workstation. Today I performed some upgrade on ubuntu to install Oracle 11g on it. After installing updates, I restarted it. Since then I am not able to login to ubuntu.