[geeks] IRQL_NOT_OR_LESS_EQUAL

[Michael Parson]

On Thu, 2 Oct 2008, Jon Gilbert wrote:
> On Oct 2, 2008, at 12:42 AM, Geoffrey S. Mendelson wrote:
>
>> Right click on the device in device manager, select details
>> and display "hardware ids".
>> 
>> You will see something like PCI\VEN_xxxx&DEV_yyyy and so on.
>> 
>> STFW is short for "Search The Fine Web". VEN is vendor id, Dev is device
>> id, both are 4 digit numbers, I believe in hex, but it does not mater
>> for searching.
>> The vendor id and device id is constant, so you can also search to see
>> if there is a Linux or xBSD driver for it too.
>> 
>> Not all manufacturers use the same device number, sometimes for different
>> versions of the same card/device. For example, I have a Realtek 8139 card
>> made by a company that used 8139 as the device id, like everyone else does,
>> but for the heck of it produced a few with a different id and no one 
>> including
>> themselves had drivers for it. I assume it was for a specific box vendor,
>> I was unable to find.
>
>
>
> Ah, well like I say, the HWID was: "ACPI\PNP0103\0". That's it. It's not a 
> PCI bus device, it's an ACPI device. Motherboard stuff from what I would 
> guess.
>
> I did STFW for "ACPI\PNP0103\0" but.. if you try it yourself, you will see.. 
> that just made my head hurt. In other words it made me more confused than I 
> already was, and I am usually pretty good at figuring stuff like this out.

>From my googling, it seems that PNP0103 is usually a "High Precision Event Timer"

Info & Spec from intel:

http://www.intel.com/hardwaredesign/hpetspec_1.pdf

However, it seems there is at least one USB Audio device that is using
that dev id too.

Given that you are seeing this device under ACPI rather than USB, I'd
wager that you're dealing with an HPET .


-- 
Michael Parson
mparson at bl.org