Doing this manually in a terminal did a succesful suspend
$ dbus-send --print-reply --system --dest=org.freedesktop.UPower /org/freedesktop/UPower org.freedesktop.UPower.Suspendmethod return sender=:1.22 -> dest=:1.712 reply_serial=2
Doing this manually in a terminal did a succesful suspend
$ dbus-send --print-reply --system --dest= org.freedesktop .UPower /org/freedeskto p/UPower org.freedesktop .UPower. Suspendmethod return sender=:1.22 -> dest=:1.712 reply_serial=2