Disable the built-in 'Desktop Sharing' and install x11vnc:
# apt-get install x11vnc
If you have an existing VNC password file:
# x11vnc -display :0 -rfbauth ~/.vnc/passwd
To set the password (not my preferred way):
# x11vnc -storepasswd yourpassword /path/to/password
Or set the password using vncpasswd (part of vnc-common):
# vncpasswd
***
Alternatively, create ~/.x11vncrc with all the options you need and then just start 'x11vnc'.
# ~/.x11vncrc
# ** uncomment options you need **
# password file must use full path
rfbauth /home/user/.vnc/passwd
display :0
forever
shared
# keyboard repeat
repeat
# visual speed tweak
nodragging
# CPU performance tweak (?)
threads
# be less verbose
quiet
# put process in background
#bg
# show GUI
#gui
To stop x11vnc running in background ('bg' option):
# x11vnc -remote stop
