Microsoft KB Archive/319274

= FIX: A 1394 device does not start if you plug in device after the computer starts =

Article ID: 319274

Article Last Modified on 10/19/2005

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APPLIES TO


 * Microsoft Win32 Device Driver Kit for Windows 2000, when used with:
 * Microsoft Windows 2000 Standard Edition

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This article was previously published under Q319274





SYMPTOMS
If you plug in a 1394 device while the computer is running, the device does not work.

Device Manager typically shows a code 10 (failed start) error.

You are more likely to experience this problem after you repeatedly plug in and unplug the device.



CAUSE
This problem occurs because the Ohci1394.sys file does not correctly allocate requested Isoch resources.



RESOLUTION
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that this article describes. Apply it only to systems that are experiencing this specific problem.

To resolve this problem, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

The global version of this hotfix has the file attributes (or later) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.   Date         Time   Version        Size     File name --  06-Mar-2002  19:16  5.0.2195.5032  37,648   Ohci1394.sys



MORE INFORMATION
The Ohci1394.sys file does not allocate requested Isoch resources if there is not sufficient contiguous memory available for a common buffer. After this hotfix is applied, the common buffer is not immediately freed when the device is unplugged. If you later plug in the device again, the same common buffer can be reused without having to obtain a new block of contiguous memory.

