Today's discovery : under #Gnome 3, #suspend is available at same place as shutdown, but needs pressing ALT key. F*ckin well hidden feature !
But what the hell : "What happens when I suspend my computer?" https://help.gnome.org/users/gnome-help/stable/power-suspend.html.en is supposed to be written for which kind of users ? ... would be great if it only explained *how* suspending is actually triggered :-/
Interesting.