I have similar device (S905) and use a remote with a USB receiver. It doesn't switch on or resume fron USB.I think that the problem is in the board, it have no power in USB when it is power off or suspended.
Someone with more info could confirm it?
It will be great to resume from USB. Someone could try to resuke with a keyboard in Android? I have no Android installed.
Best regards.
Hmmm, thanks that's disappointing, I'll try with android over the weekend.