Managed to do that.
First of all, you must configure your vino server by running vino-preferences as root.
Then, append the line
/usr/lib/vino/vino-server --sm-disable &
in file /etc/gdm3/Init/Default
before the line 'exit 0'
And finally, you must prevent vino from being run second time after logging in by disabling it's autorun in System->Parameters->Autorun (or something like that, my installation has different locale)
Last edited by nihilus; 02-21-2012 at 05:13 AM.