[ubuntu] how to set a unity session in VNC on ubuntu 13.10

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http://ubuntuforums.org – I have installed vnc4server. I am able to login to a virtual remote desktop. I have been succssfull only with kde session. gnome-session or unity produced the gray window with no windows manager. my ~/.vnc/xstartup is Quote: # Uncomment the following two lines for normal desktop: unset SESSION_MANAGER # exec /etc/X11/xinit/xinitrc #gnome-session --session=ubuntu & [ -x /etc/vnc/xstartup ] && exec /etc/vnc/xstartup [ -r $HOME/.Xresources ] && xrdb $HOME/.Xresources #xsetroot -solid grey vncconfig -iconic & startkde & #gnome-session (Hardware)