marco@ubuntu-vmware:~:0$ sudo service lightdm stop
marco@ubuntu-vmware:~:0$ systemctl --user status graphical-session.target 
● graphical-session.target - Current graphical user session
   Loaded: loaded (/usr/lib/systemd/user/graphical-session.target; static; vendor preset: enabled)
   Active: active since mer 2016-08-31 13:44:47 CEST; 29s ago
     Docs: man:systemd.special(7)

ago 31 13:44:47 ubuntu-vmware systemd[6159]: Reached target Current graphical user session.