Hello

I'm building USB device drivers for a composite USB device with a modem interface (part of the Modem device class) and serial interfaces (part of the Ports device class).

I've a problem: when the system sends IRP_MJ_PNP/IRP_MN_QUERY_CAPABILITIES down to device stack, the USBD bus driver returns a S0 -> D2 power state mapping in the DEVICE_CAPABILITIES:

DeviceCapabilities->DeviceState[PowerSystemWorking] equals to PowerDeviceD2.

I'd expect a S0 -> D0 mapping. What's the meaning of this power state mapping ? Do I have to do something special here ?

I'm running Win2K SP 3 on a HP OmniBook XE3. My USB composite device connects directly to an external NEC USB 2.0 CardBus controller.

Thx, Peter