Re: Selective suspend of usbhub

Tech-Archive recommends: Fix windows errors by optimizing your registry

how are you going to coordinate these transfters to control the hub with the usbhub driver itself? if you are sending IOCTLs through the hub driver, that should wake it up

d

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"grapwang" <grapwang@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message news:99E5FB2D-256A-4E8E-843D-A9FE2F297165@xxxxxxxxxxxxxxxx
Dear Holan,

Thank you a lot for the reply. I just want to send some USB requests to
control the hub. How do I wake it when I want to do so?

Thanks again!
--
Grap


"Doron Holan [MSFT]" wrote:

there is only one power policy owner for any device node, basically only one
driver may call PoRequestPowerIrp in the stack to maintain power state. you
were getting lucky in XP that your violation of this rule worked. obviously
in vista the violation of the rule causes a bluescreen.

why do you need to wake up the hub when the hub drivers thinks it is OK to
be in low power?

d

.

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