Audio Program Stops Responding After You Disconnect a USB Multimedia Device While You Are Using the Device (818801)


The information in this article applies to:

  • Microsoft Windows 2000 Server
  • Microsoft Windows 2000 Advanced Server
  • Microsoft Windows 2000 Professional

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.

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.

RESOLUTION

Hotfix Information

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.

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.

STATUS

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

Modification Type:MinorLast Reviewed:10/28/2005
Keywords:kbHotfixServer kbQFE kbBug kbfix kbQFE kbWin2000preSP5fix KB818801 kbAudITPRO
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