dbus-send --session --type=method_call --print-reply --dest=org.gnome.SessionManager /org/gnome/SessionManager org.gnome.SessionManager.Logout uint32:1
gnome-session-quit --no-prompt
dbus-send --system --print-reply \\\n --dest="org.freedesktop.UPower" \\\n /org/freedesktop/UPower \\\n org.freedesktop.UPower.Suspend