It's not worked for several released for me I think there's a thread on AMD forums about it, lots of people get no signal when exiting sleep and have to reboot.
It worked differently for me, after resuming (powering up from sleep state) the system reboots, Windows tries to Resume and it takes a long time with at least 30 seconds freezes before loading Windows screen and some time on the desktop before it comes back to "normal". It seems to fixed itself after reinstalling the drivers (installing on top of the current ones).