I installed cairo-dock, gnome-shell, gnome-shell-fallback, and Linux Mint Mate in my Ubuntu 11.10 Oneiric. There’re too many entries in the login drop-down list.
Now I’m going to remove unwanted entries and only keep gnome-shell, unity, mate, and recovery console.
Open up a terminal window, and navigate to /usr/share/xsessions/ by this command:
There’re several .desktop files and each for one entry in the login drop-down list.
So to remove an entry, just remove/rename the .desktop file. For example, I got the mate desktop, so I’m going to remove gnome-classic by renaming it:
sudo mv gnome-classic.desktop gnome-classic.desktop-backup
or just remove it by:
sudo rm gnome-classic.desktop