[wdmaudiodev] Re: USBAudio Driver Fails to Start In Vista
- From: DJ Sisolak <dsisolak@xxxxxxxxxxxxxxxxxxxxxx>
- To: "wdmaudiodev@xxxxxxxxxxxxx" <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Fri, 24 Mar 2006 17:51:22 -0800
Even better. Thanks! I didn't realize you were in the neighborhood.
Thx,
DJ
-----Original Message-----
From: wdmaudiodev-bounce@xxxxxxxxxxxxx
[mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of Sam Tertzakian
Sent: Friday, March 24, 2006 5:47 PM
To: wdmaudiodev@xxxxxxxxxxxxx
Subject: [wdmaudiodev] Re: USBAudio Driver Fails to Start In Vista
Hi, DJ,
If you want, I can drop off the device in your office
and give you the datasheet for it.
I pesonally don't know a lot of the details about the
device, so I don't want to guess.
--- DJ Sisolak <dsisolak@xxxxxxxxxxxxxxxxxxxxxx>
wrote:
> If this was working in XP using the class driver
> then it should work in Vista using the class driver.
> If not, we broke something and it needs to be fixed
> (the caveat being that the Vista class driver does
> check for more descriptor/functional anomalies and
> errors when determining class compliancy). I need to
> know the specifics about the device so I can dig
> into this further if that is possible. I don't want
> to distress anyone either. J
>
> Sam, could you send me more info about the device in
> question directly?
>
> Thanks,
> DJ Sisolak
>
> ________________________________
> From: wdmaudiodev-bounce@xxxxxxxxxxxxx
> [mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf
> Of Sam Tertzakian
> Sent: Friday, March 24, 2006 2:48 PM
> To: wdmaudiodev@xxxxxxxxxxxxx
> Subject: [wdmaudiodev] Re: USBAudio Driver Fails to
> Start In Vista
>
> Yes, I believe it is "a USB 2.0 device, on a USB 2.0
> bus, running USB Audio Class 1.0, at the speed of
> USB 1.1.".
>
> It is a part of a USB Composite Device composed of
> two devices, video and audio.
>
> "Is the firmware really that hard to change?"
>
> Well what about all the people who have a device in
> their house that used to work on XP but now does not
> work under Vista? It is not changing the firmware
> that is difficult...it is getting the change to the
> thousands of people that have the device in their
> house. Not only that, this device does not have
> firmware...it is a chip.
>
> I think it is going to be very distressing for
> people who have this problem. I can tell you that I
> am distressed over it. This is the last thing I
> expected to fail...since the hardware is using the
> MSFT in box driver directly.
>
> All of this started because I was trying to answer
> Andrew's question about stereo devices...and I
> happen to have a USB Audio stereo device.
>
> ________________________________
> From: wdmaudiodev-bounce@xxxxxxxxxxxxx
> [mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf
> Of Tim Roberts
> Sent: Friday, March 24, 2006 2:24 PM
> To: wdmaudiodev@xxxxxxxxxxxxx
> Subject: [wdmaudiodev] Re: USBAudio Driver Fails to
> Start In Vista
>
> Sam Tertzakian wrote:
> Hi, Hakon,
>
> Yes, it must be a USB 1.1 Audio on a USB 2.0 Bus.
>
> Let's be very precise: we're talking about a USB 2.0
> device, on a USB 2.0 bus, running USB Audio Class
> 1.0, at the speed of USB 1.1. Right? There is no
> "USB 1.1 Audio".
>
>
> When I load it in XP it says, "USB Audio" in device
> manager and for location it says "Location 0 (USB
> 2.0 Video)".
>
> Video? Really?
>
>
> So are you saying that the firmware needs to be
> changed even thought it works fine under XP (to
> specify an interval of 8 for the interface so it
> uses the same 1ms data distribution of an USB 1.1
> device)?
>
> The EHCI driver will support iso pipes at high
> speed. USBAUDIO.SYS, which is specific to audio
> class, apparently will not. To support more than
> one packet per frame, the requests have to be
> submitted in multiples of 8. As I recall,
> USBAUDIO.SYS submits 10 packets per request. That
> doesn't work.
>
>
> Is it possible to write a Filter Driver to correct
> this problem?
>
> I don't think so. Although many descriptor problems
> can be fixed, in this case you'd have to rewrite the
> device descriptor before it went in to EHCI. Is the
> firmware really that hard to change?
>
> --
>
> Tim Roberts, timr@xxxxxxxxx<mailto:timr@xxxxxxxxx>
>
> Providenza & Boekelheide, Inc.
>
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