Hello,
It depends on which sleep mode you want to wake up from.
For very deep sleep modes (like
S5), it will depend on both the platform and the device model.
For your dock to wake up the computer, the computer has to be listening.
For the OP, the problem is most likely the need to set Windows to listen. When the change to Anniversary Update took place, Windows reset the settings.
Our developers are working in adding selective suspend support in Anniversary Update onwards to save power. At the moment the driver doesn't go into power save. This hasn't been a priority as people who are docked are usually also power connected and if not, Windows will terminate the driver anyway...
Regards,
Alban