Install VNC server in Ubuntu 11.10 Oneiric for remote-desktop is very easy. Here are the steps to install :
sudo apt-get install x11vnc
sudo x11vnc -storepasswd yourpasswordhere /etc/x11vnc.pass
sudo chmod 744 /etc/x11vnc.pass
Now you should edit your lightdm :
sudo vim /etc/lightdm/lightdm.conf
greeter-setup-script=/usr/bin/x11vnc -auth /var/run/lightdm/root/:0 -noxrecord -noxfixes -noxdamage -rfbauth /etc/x11vnc.pass -forever -bg -rfbport 5900 -o /tmp/x11vnc.log
To run manually :
sudo x11vnc -rfbauth /etc/x11vnc.pass -o /var/log/x11vnc.log -forever -bg -rfbport 5900 -nomodtweak
or
sudo x11vnc -auth /var/run/lightdm/root/:0 -noxrecord -noxfixes -noxdamage -rfbauth /etc/x11vnc.pass -forever -bg -rfbport 5900 -o /tmp/x11vnc.log
Happy remote desktop! 
excellent tutorial, set this up the first time and the auto command worked , the second time i did it , it dont not to worry i just SSH into it and run the manual command from there , more secure that way
Thanks
Nice work! … it works using x11vnc!!! You saved my QA lab.
The native built-in desktop sharing in 11.10 doesn’t work at all!
ok this works but how could i start on lubuntu boot automatically