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Windows OS10
I have a camera with usb audio class support.

I am perfectly able to stream audio from this device in Win XP but trying to

stream audio in win2ksp4 results in a system crash . The usbaudio.sys version

on my system is 5.00.2150.1

Are there are any known problems in usbaudio.sys or more likely is my device

firmware broken ? The device is usb2.0 high speed with support for Interface

Associate Descriptors.

My endpoint wMaxPacketSize: 0x0100 max bytes and

wInterval: 0x0004

I noticed from CATC trace that in WinXP,the length of bytes transferred is

92 bytes

while in Win 2K it is 100 bytes.


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"michelle@online.nospam" wrote:



I am perfectly able to stream audio from this device in Win XP but trying

to

stream audio in win2ksp4 results in a system crash . The usbaudio.sys

version

on my system is 5.00.2150.1



Microsoft Knowledge Base article 891069

( http://support.microsoft.com/kb/891069) references the latest USBAUDIO.SYS

for Win2k:



Date Time Version Size File name

--------------------------------------------------------------

10-Jan-2005 11:37 5.0.2195.7019 69,328 Usbaudio.sys



You can contact Microsoft Product Support Services to obtain the hotfix.



John Garrett [MSFT]

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

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{\rtf1\ansi\ansicpg1252\deff0\deflang1033{\fonttbl{\f0\fswiss\fprq2\fcharset0 Trebuchet MS;}{\f1\fmodern\fprq1\fcharset0 Lucida Console;}}

\viewkind4\uc1\pard\f0\fs20 "michelle@online.nospam" wrote:

\par

\par \pard\li720 I am perfectly able to stream audio from this device in Win XP but trying to

\par stream audio in win2ksp4 results in a system crash . The usbaudio.sys version

\par on my system is 5.00.2150.1

\par \pard

\par Microsoft Knowledge Base article 891069 ( http://support.microsoft.com/kb/891069) references the latest USBAUDIO.SYS for Win2k:

\par

\par \f1\fs18 Date Time Version Size File name

\par --------------------------------------------------------------

\par 10-Jan-2005 11:37 5.0.2195.7019 69,328 Usbaudio.sys

\par \f0\fs20

\par You can contact Microsoft Product Support Services to obtain the hotfix.

\par

\par John Garrett [MSFT]

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

\par

\par }

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"michelle@online.nospam" wrote:



My endpoint wMaxPacketSize: 0x0100 max bytes and

wInterval: 0x0004

I noticed from CATC trace that in WinXP,the length of bytes transferred is

92 bytes

while in Win 2K it is 100 bytes.



This link may be helpful:

http://www.microsoft.com/whdc/system/bus/usb/USBFAQ_intermed.mspx



See particularly the "What is the maximum size of USB transfers on various

operating systems?" section.



John Garrett [MSFT]

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

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{\rtf1\ansi\ansicpg1252\deff0\deflang1033{\fonttbl{\f0\fswiss\fprq2\fcharset0 Trebuchet MS;}}

\viewkind4\uc1\pard\f0\fs20 "michelle@online.nospam" wrote:

\par \pard\li720

\par My endpoint wMaxPacketSize: 0x0100 max bytes and

\par wInterval: 0x0004

\par I noticed from CATC trace that in WinXP,the length of bytes transferred is

\par 92 bytes

\par while in Win 2K it is 100 bytes.

\par \pard

\par This link may be helpful:

\par http://www.microsoft.com/whdc/system/bus/usb/USBFAQ_intermed.mspx

\par

\par See particularly the "What is the maximum size of USB transfers on various operating systems?" section.

\par

\par John Garrett [MSFT]

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

\par

\par }

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michelle <michelle@online.nospam>wrote:

Windows 2000 doesn't do IAD. It's true that usbaudio.sys has evolved over

time, but it was pretty good by Windows 2000. Also, Windows 2000 didn't

ship with any USB 2.0 host controllers. Are you using a 1.1 controller

with a stock driver, or do you have some third-party controller and driver?



How could the operating system possibly have an effect on this? If

wMaxPacketSize is 0x100, then usbaudio.sys will ask for 256 bytes every

single time. The actual amount of data transferred is determined solely by

your device

--

Tim Roberts, timr@probo.com

Providenza & Boekelheide, Inc.

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Hi Tim

I am not using any third party controllers.

My test PC has Intel Chipset with USB 2.0 support (EHCI Controller).





"Tim Roberts" wrote:

As I know, the usbaudio.sys in Win2k do not support high speed UAC

compatible device. It only supports full speed UAC compatible device.



"michelle" <michelle@online.nospam>wrote in message

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