Microsoft KB Archive/284837

= 1394 Audio/Video Control Device Stops Working Unexpectedly =

Article ID: 284837

Article Last Modified on 1/29/2007

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APPLIES TO


 * Microsoft Windows 2000 Service Pack 1
 * Microsoft Windows 2000 Advanced Server
 * Microsoft Windows 2000 Service Pack 1
 * Microsoft Windows Millennium Edition
 * Microsoft Windows 98 Second Edition
 * Microsoft Windows 98 Standard Edition

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This article was previously published under Q284837





SYMPTOMS
After you play or record digital audio or video by using an Audio Video Control (AV/C) device, such as a 1394 AV/C hard disk or DV camcorder, the 1394 bus may stop functioning.

The error message that is displayed by your media control software will vary, but will typically indicate that one or more of the devices on the 1394 bus cannot be accessed, or has stopped working.



CAUSE
The Microsoft-supplied 1394 Open Host Controller Interface (OHCI) driver may attempt to lock a bus speed that is faster than the controller supports. The Ohci1394.sys driver defaults the &quot;spd&quot; field setting in the REQUEST_ASYNC_LOCK OUTPUT_MORE-Immediate descriptor, which may result in a fatal error if it is set over the 1394 OHCI controller's maximum speed capability.



RESOLUTION
The English version of this fix should have the following file attributes or later:

                                                         Operating Date       Time     Version        Size    File name     System

03/08/2001 09:29pm  4.10.2228      37,040  Ohci1394.sys  Windows 98 Second Edition 03/09/2001 01:08pm  4.90.3004      49,872  Ohci1394.sys  Windows Me 03/21/2001  06:18pm  5.0.2195.3395  37,392  ohci1394.sys  Windows 2000

Microsoft Windows 98
Windows 98 version 4.10.1998 (the original release) includes limited support for 1394 technology, which was an emerging technology when Windows 98 was released. Microsoft has determined that functional upgrades to 1394 support cannot be made sufficiently reliable, and therefore has no plans to produce updates or enhancements. For this reason, Microsoft recommends that you update your operating system to a newer version if you are experiencing the problems that are documented in this article.

Microsoft Windows 98 Second Edition
Before you install the update that is described in this article, you must install the updates that are described in the following Microsoft Knowledge Base articles:

242975 Update for 1394 Storage Peripherals in Windows 98 Second Edition

267304 Trap 14 on Resume from Standby with FireWire Device

Windows 2000
To resolve this problem, obtain the latest service pack for Windows 2000. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

260910 How to Obtain the Latest Windows 2000 Service Pack



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem was first corrected in Windows 2000 Service Pack 3.



MORE INFORMATION
This problem has been observed with, but is not necessarily limited to, VIA Fire VT6xxx-series IEEE 1394 chip sets.

For additional information about Windows 98 and Windows 98 Second Edition hotfixes, click the article number below to view the article in the Microsoft Knowledge Base:

206071 General Information on Windows 98 and SE Hotfixes

For additional information about Windows ME hotfixes, click the article number below to view the article in the Microsoft Knowledge Base:

295413 General Information About Windows Millennium Edition Hotfixes

Additional query words: kbBaseOS

Keywords: kberrmsg kbbug kbfix kbqfe kbhardware kbwin2000sp3fix kboswin2000fix kbhotfixserver KB284837

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