Re: Serial Port Filter Driver causes DRIVER_POWER_STATE_FAILURE (0x9f) Bug Check

Hi Mark,

That was it! Thanks…you’re a life saver!

I can see I need to get up to speed on the changes made since the NT4
driver model (which I’ve done). I assumed (always a bad thing) a legacy
Nt4 style driver would work on Win2k/XP. Clearly this isn’t true.


See the latest ddk:
Calling PoStartNextPowerIrp from a Filter Driver

Mark Roddy