RE: [DISCUSSION] USB device remote wakeup is not working for S3 case

[Du, Changbin]

> You have to make sure that wakeup is also enabled for the host
> controller the device is attached to.  For some host controllers, it
> may also be necessary to enable wakeup for the root hub.
> 
Yes, the root-hub is not wakeup enabled by default, actually hub
devices are not enabled. It works after I enable it via sysfs interface.

> > Could we also enable wakeup for usb mouse? Or is there any concern to
> enable it?
> > Per my opinion, most people may expect clicking mouse can awake system.
> 
> It doesn't matter to me, but you should ask the people on the
> linux-input mailing list.
> 
> Also, what about wakeup for a non-USB mouse?  Shouldn't that be enabled
> as well?
Unfortunately the mouse I found are all of usb so cannot confirm it. The
concern is if we want usb keyboard/mouse wakeup work by default, it does
make sense only if the parent hubs are also enabled by default.  This is a policy
issue and may be better place it on userspace. I have no better idea :) .

> 
> Alan Stern
Regards
Du, Changbin
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