upower "Resuming" signal is not emitted or seen

[Antoine Martin]

Hi,

My application needs to know when the machine has just resumed from
suspended state.
So, it seems that what is needed is just this UPower "Resuming" signal
that I should be able to receive via dbus:
http://upower.freedesktop.org/docs/UPower.html#UPower::Resuming

It does seem to work on some distributions (it is quite a bit harder to
test with VirtualBox since it does its own suspend-resume..)
Unfortunately, on Fedora 20 nothing happens, no signal is emitted (that
I can see), neither automatically nor by firing this script by hand:

/usr/lib/systemd/system/upower.service


I have already reported this bug in RedHat's bugzilla for Fedora 20:
https://bugzilla.redhat.com/show_bug.cgi?id=1064906
But since there is no activity here, I thought I might ask here instead.
Any ideas?

Cheers
Antoine