Regarding Wake On USB input from S3 Sleep

[Ian Smith]

On Thu, 11 Feb 2016 13:16:48 +0100, Hans Petter Selasky wrote:
 > On 02/11/16 13:08, Dee Zay wrote:
 > > Hello,
 > > 
 > > So, is the BIOS handover to the USB stack a prerequisite when resuming from
 > > standby mode HC (not completely off HC)?
 > 
 > Hi,
 > 
 > I'm not sure. You'll have to find out. It is what happens when you suspend
 > which decides if you get the resume event or not. Once resumed the system
 > will manage somehow, either full reset or handover.
 > 
 > > In other words, do we need to implement BIOS handover before we can use
 > > wake on usb keyboard input?
 > 
 > Might depend on the BIOS make. I've never tested this on FreeBSD before so I
 > don't know.
 > 
 > > Or is there a workaround for this specific functionality?
 > 
 > Maybe check what Linux is doing.

Do you have any rough idea of the difference in battery power used in S3 
with HC(s?) running, or in standby, or off?  Depending on hardware of 
course, but I'm just wondering how relatively significant it might be?

cheers, Ian