The USB wake up can still even device is detached. 
Before system enter to S3 and when detach the USB device, we can enable 
device's remote wake up feature.
it can still send out the resume signal to host if it connected from hardware.

Thanks & Regards,

Shichun Ma
Software Engineer
Dell | Cloud Client Computing
office +86 10 82862579,  Mobile +86 13241851528
[email protected]



________________________________________
From: Hans Petter Selasky <[email protected]>
Sent: Friday, January 10, 2020 4:58 PM
To: Ma, Horse; [email protected]
Subject: Re: USB keyboard/mouse wake up from S3

[EXTERNAL EMAIL]

On 2020-01-10 04:06, [email protected] wrote:
> Any one tested wake up USB keyboard on FreeBSD? What's setting?
>
> It doesn't work in my test.
>

Hi,

FreeBSD USB detach and reset the XHCI before going to sleep.

So likely wakeup doesn't work, because the USB device is no longer
enumerated.

--HPS

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