I upgraded from 12.10 to 13.04 and cinnamon stops working. When I load cinnamon it only displays a slow responding cursor over a black screen. And the desktop never loads.
So (for getting access to my desktop) I purged cinnamon and did this :
sudo /usr/lib/lightdm/lightdm-set-defaults -s unity
and when it didnt work I tried this
dconf reset -f /org/compiz/ unity --reset-icons &disown
And it restored unity.
Now When I install cinnamon it again runs into same old problem of - dark screen with only a cursor. What do I do for getting cinnamon?