Re: USB Port resets after S3 standby

Tech-Archive recommends: Repair Windows Errors & Optimize Windows Performance

From: Doron Holan [MS] (doronh_at_nospam.microsoft.com)
Date: 05/31/04 

Date: Mon, 31 May 2004 09:24:14 -0700

did you write the driver for this device? if so, are you blocking all i/o
to the device while the device is not in D0? it sounds like you are
allowing a write to your device before the D0 irp has been processed by the
PDO of your device.

d 

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"Aaron" <aperry@atg.com> wrote in message
news:uxMEO1wREHA.1448@TK2MSFTNGP11.phx.gbl...
> Hi,
> I have an application that automatically brings my computer out of standby
> and immediately issues a command to my USB-based (1.1) infrared blaster.
>
> The problem is that it seems Windows XP likes to "reset" the USB ports as
it
> comes out of standby, which takes about 5-10 seconds. I know this, because
I
> can hear the generic USB plug-in sound. And while the reset is happening,
> the command to the infrared device takes place and fails (because Windows
> doesn't think the device is present until the "reset" is complete).
>
> By the way, the USB device stays on all through the S3 standby (enabled
with
> the correct motherboard jumper settings). So, this "reset" seems somewhat
> useless to me.
>
> Does anyone know how to stop Windows from re-registering the USB port
after
> S3 standby?
>
> I'm sorry that this is more of a configuration question than a development
> one, but I'm not having any success elsewhere.
>
> Thanks,
> Aaron
>
>

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