Comment 23 for bug 1574120

Suspend from the session indicator works.

systemd-inhibit:
     Who: patrick (UID 1000/patrick, PID 1564/unity-settings-)
    What: sleep
     Why: GNOME needs to lock the screen
    Mode: delay

     Who: Unity (UID 1000/patrick, PID 1570/compiz)
    What: sleep
     Why: Unity needs to lock the screen
    Mode: delay

     Who: patrick (UID 1000/patrick, PID 1564/unity-settings-)
    What: handle-power-key:handle-suspend-key:handle-hibernate-key
     Why: GNOME handling keypresses
    Mode: block

     Who: NetworkManager (UID 0/root, PID 722/NetworkManager)
    What: sleep
     Why: NetworkManager muss Netzwerke abschalten
    Mode: delay

4 inhibitors listed.