$ loginctl
   SESSION        UID USER             SEAT             TTY             
        c1        114 lightdm          seat0                            
        c2       1000 adam             seat0                            

2 sessions listed.

$ loginctl session-status c1
c1 - lightdm (114)
           Since: Tue 2016-11-08 16:36:17 GMT; 9min ago
          Leader: 1049
            Seat: seat0; vc7
         Display: :0
         Service: lightdm-greeter; type x11; class greeter
           State: closing
            Unit: session-c1.scope
                  ├─1137 /usr/lib/at-spi2-core/at-spi2-registryd --use-gnome-session
                  ├─1148 nm-applet
                  └─1150 /usr/lib/unity-settings-daemon/unity-settings-daemon

Nov 08 16:36:17 adam-ubuntu20161008-VirtualBox systemd[1]: Started Session c1 of user lightdm.
Nov 08 16:36:22 adam-ubuntu20161008-VirtualBox PAM-CGFS[1049]: Corrupt /proc/self/cgroup
Nov 08 16:36:22 adam-ubuntu20161008-VirtualBox PAM-CGFS[1049]: Failed to get list of controllers
Nov 08 16:36:23 adam-ubuntu20161008-VirtualBox org.a11y.atspi.Registry[1135]: SpiRegistry daemon is running with well-known name - org.a11y.atspi.Registry
Nov 08 16:36:29 adam-ubuntu20161008-VirtualBox pulseaudio[1227]: [pulseaudio] alsa-util.c: Disabling timer-based scheduling because running inside a VM.
Nov 08 16:36:29 adam-ubuntu20161008-VirtualBox pulseaudio[1227]: [pulseaudio] sink.c: Default and alternate sample rates are the same.
Nov 08 16:36:29 adam-ubuntu20161008-VirtualBox pulseaudio[1227]: [pulseaudio] alsa-util.c: Disabling timer-based scheduling because running inside a VM.
Nov 08 16:36:37 adam-ubuntu20161008-VirtualBox lightdm[1049]: pam_unix(lightdm-greeter:session): session closed for user lightdm
Nov 08 16:36:37 adam-ubuntu20161008-VirtualBox PAM-CGFS[1049]: Corrupt /proc/self/cgroup
Nov 08 16:36:50 adam-ubuntu20161008-VirtualBox pulseaudio[1227]: [pulseaudio] bluez5-util.c: GetManagedObjects() failed: org.freedesktop.DBus.Error.TimedOut: Failed to activate service 'org.bluez': timed out