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Audio Program Stops Responding After You Disconnect a USB Multimedia Device While You Are Using the Device

Article ID: 818801 - View products that this article applies to.

SYMPTOMS

If you disconnect a USB audio device, for example a Bluetooth headset, from your Microsoft Windows 2000-based computer while you are using the USB device to listen to an audio stream, the program that you use to play the audio stream may stop responding, and you may not be able to shut down your computer.

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CAUSE

This problem may occur if the USB audio device that you disconnect is based on Portcls.sys. Portcls.sys is an audio port-class driver for port/miniport devices. If you disconnect a USB device from your computer while you are using the USB device to listen to an audio stream, Portcls.sys does not correctly handle the IRP_MJ_CLOSE request that occurs after the IRP_MN_SURPRISE_REMOVAL request is generated. Because of this behavior, Portcls.sys cannot close the audio stream and complete the handle cleanup. Also, an IRP_MN_REMOVE_DEVICE request is not generated because open handles remain. When this problem occurs, the program that you use to play the audio stream may stop responding, and you may not be able to shut down your computer.

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RESOLUTION

Hotfix Information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, submit a request to Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site:

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

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

Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

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   Version        Size     File name
   --------------------------------------------------------
   25-Jul-2003  19:47  5.0.2195.6793  145,552  Portcls.sys
   25-Jul-2003  19:47  5.0.2195.6793   46,000  Sysaudio.sys

Note Because of file dependencies, this hotfix requires Windows 2000 Service Pack 3 (SP3) or later.

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STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.

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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

(http://support.microsoft.com/kb/816915/ )

New Naming Schema for Microsoft Windows Hotfix Packages

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