Re: Calling ACPI on Vista

how did you install your WDF driver? what hardware ID did you use to
install it (assuming it is a pnp driver, not a legacy driver). you cannot
just send ACPI ioctls down any device stack. you have to be installed on the
right device stack (as identified by the hardware ID) to send down the acpi
request.

d

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"jczernia" <> wrote in message
news:1d765854-6218-44e3-8e60-...
> Hi
> I spent several hours on evaluating ACPI control method on Vista and
> honestly I am in no way out point. I read MSFT white paper "ACPI
> Driver Interface in Windows Vista" and it seems to be piece of cake.
> Just send IRP down the stack. So in my WDF driver (FDO) took my
> default IOTarget and called WdfIoTargetSendInternalIoctlSynchronously
> (used some dummy ACPI request). Unfortunately I got
> STATUS_INVALID_DEVICE_REQUEST status as a result. In my understanding
> it means that IOCTL_ACPI_xxx is not supported somewhere below my
> driver. To avoid issues related to my driver I used WDF serial driver
> sample from WDK, but have the same result. So either there is a bug in
> my understanding or my dummy ACPI request causes the issue (is it
> possible? I have used few different ones). How to determine that my
> IOCTL reaches acpi.sys? Any other suggestions what might be wrong are
> welcome.
> Thank you in advance
> Regards
> Jacek

no, not really. just b/c acpi enumerated the device does not mean that it
supports any acpi methods.

d

--

This posting is provided "AS IS" with no warranties, and confers no rights.


"jczernia" <> wrote in message
news:93c3d2c1-2e80-4a8c-a3d6-...
> Thank you, device stack was one of my concerns, that's why I deceided
> to use WDK sample (wdfserial) which seems to be in the right device
> stack (in device manager window (devices by connection) it appears in
> ACPI tree). Am I right? Is thare any other sample wdf driver which
> should I use instaead of wdfserial?
> Regards
> Jacek