Remote restart of gui after logout

[John]

Hi All.  I remote to my Ubuntu box with vnc.  Sometimes I have to log 
out and then log back in, but I don't need to restart.  The problem is 
that when I log out, the remote services that allow me to vnc in are no 
longer running when I am logged out.  I can still SSH in.  So my 
question is, how do I either restart gui and remote services from the 
SSH command line, or how do I set it up so that remote services are 
still running while I am logged out?

So far from the SSH command line I tried: startx, xinit, initlevel 5

- J