Re: usb device power down

if your device is a multiinterface device, this won't work if you expect the
device to be able to use resume signalling to wake itself back up. all
interfaces must go into Dx before resume signalling will work.

d

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"Maxim S. Shatskih" <maxim@xxxxxxxxxxxxxxxx> wrote in message
news:uT08SNnlFHA.3312@xxxxxxxxxxxxxxxxxxxxxxx
> Yes. In your driver, call PoRequestPowerIrp - device power IRP to state
> D3 - at the necessary moment.
> Be sure you will handle the races between this and the whole system
> going
> down/hibernate/awaken.
>
> --
> Maxim Shatskih, Windows DDK MVP
> StorageCraft Corporation
> maxim@xxxxxxxxxxxxxxxx
> http://www.storagecraft.com
>
> "Gianni Zanone" <Gianni Zanone@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
> news:5BDA0EEA-0C12-4C7D-AA76-4297B9358662@xxxxxxxxxxxxxxxx
>> Can windows power down a usb device (put down +5V)?
>> I would like to use a software switch on PC instead of a power swith on
>> device.
>> The device has external power supply.
>>
>>
>>
>>
>
>


.

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