Comment 130 for bug 150471

noticed the same thing and solved it by adding a killall -9 nautilus to /etc/gdm/PreSession/default and /etc/gdm/PostSession/default . This prevents nautilus from chewing cycles when people are not logged in
instead of just waiting untill someone logs in again. This also works if X dies randomly or someone does
Ctrl+Alt+Backspace.

Beware that if you use xdmcp or some other way of having more than one session at once then other nautilui
will be killed by this . Nautilus should restart automatically for any effected user so this might not be as bad as
it seems , ymmv .

How about a patch ubuntu peeps ?