Comment 29 for bug 890441

More comment about post #28 above:
- unity 2d & 3d was completly purged, and their dependencies & related packages too.

 - but while booting i always got stuck to "checking battery state"
- looking at lightdm, it need EITHER lightdm-gtk-greeter (was installed) OR unity-geeter. Thats wrong, unity-greeter needs to be installed to get lightdm login screen, then X start, otherwise i have to log via tty.

As a result: nautilus dont eat ram without unity-greeter, but with it installed nautilus is continously eating ram (a bit less than with the whole unity, but)