I had this problem with Gnome on Karmic Koala.
It was caused by using KDM as the display manager instead of GDM.
To switch to GDM:
sudo dpkg-reconfigure gdm
I had this problem with Gnome on Karmic Koala.
It was caused by using KDM as the display manager instead of GDM.
To switch to GDM:
sudo dpkg-reconfigure gdm