Microsoft KB Archive/813348

= FIX: Selective Suspend Does Not Work on Video Capture Devices That Use the Stream Class Driver =

Article ID: 813348

Article Last Modified on 10/12/2005

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APPLIES TO


 * Microsoft Windows XP Home Edition
 * Microsoft Windows XP Professional

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SYMPTOMS
If a universal serial bus (USB) video capture device that uses the stream class driver (stream.sys) is idle, and if the system later turns off the device, the device cannot start again when its services are required. As a result, the program that is trying to use the video capture device may stop responding.



CAUSE
This problem was introduced in Microsoft Windows XP Service Pack 1 (SP1) as a result of a modification that was made to the stream class driver. A change was included in SP1 to prevent communications to devices that are idle. This change blocks input/output request packet (IRP) processing. However, the SP1 implementation did not take into account selective suspend functionality. Selective suspend IRPs must not be blocked in this manner.



RESOLUTION
This hotfix contains changes to the stream class driver that permits the driver to correctly process the selective suspend IRPs so that the device can start when a program requires the device to start.

Hotfix Information
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Windows XP service pack that contains this hotfix.

To resolve this problem immediately, 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.

Prerequisites
No prerequisites are required.

Restart Requirement
You must restart your computer after you apply this hotfix.

Hotfix Replacement Information
This hotfix does not replace any other hotfixes.

File Information
The English 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   Size     File name 19-Sep-2003 19:46  291,328  40708_enu_i386_zip.exe



WORKAROUND
There is no workaround for this problem.



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section of this article.



MORE INFORMATION
For additional information about how hotfix packages are named, click the following article number to view the article in the Microsoft Knowledge Base:

816915 New Naming Schema for Microsoft Windows Hotfix Packages

Keywords: kbbug kbfix kbqfe kbhotfixserver KB813348

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