I don't know what I did to my display manager in the past (I had xubuntu at some point, but I got rid of it, and don't see any remnants of it...), but I just upgraded to Ubuntu 11.04 and expected to be greeted with a fancy new Unity interface... but all I got was the same old thing I had before.
What would be preventing Unity from running?
I'm running Ubuntu in a VM, and have activated accelerated 3d graphics, so Ubuntu is not asking me to switch to classic desktop mode (and I have not selected it).
