Microsoft KB Archive/822829

= FIX: MIDI application stops responding after sudden removal of MIDI device =

Article ID: 822829

Article Last Modified on 10/25/2005

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APPLIES TO


 * Microsoft Windows XP Home Edition
 * Microsoft Windows XP Home Edition
 * Microsoft Windows XP Professional
 * Microsoft Windows XP Professional

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SYMPTOMS
When you unplug the universal serial bus (USB) cable while playing or while recording with the USB Musical Instrument Digital Interface (MIDI) device for Turtle Beach, the MIDI application may stop responding.



CAUSE
This problem occurs because the audio-class driver does not correctly cancel the I/O Request Packets (IRPs) if a device is unplugged. Even if the audio-class driver does cancel the IRPs, the Wdmaud.drv driver still is unaware that a change is made and continues to block any action. The Wdmaud.drv driver waits for the IRPs to complete. This problem causes certain MIDI APIs to stop responding while waiting for the completion thread to exit. The completion thread never exits.



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

322389 How to obtain the latest Windows XP service pack

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.

File Information
The English version of this fix 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 --  11-Nov-2003  02:30  5.1.2600.1319     132,608  Ks.sys 09-Nov-2003 18:37  5.1.2600.1319      57,088  Usbaudio.sys 11-Nov-2003 02:31  5.1.2600.1319      22,016  Wdmaud.drv



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

This problem was first corrected in Microsoft Windows XP Service Pack 2.



MORE INFORMATION
For additional information about a related fix that must be installed before this package, click the following article number to view the article in the Microsoft Knowledge Base:

816650 Multimedia device does not shut down correctly if you unplug the device during streaming

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 file naming schema for Microsoft Windows software update packages

For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

824684 Description of the standard terminology that is used to describe Microsoft software updates

Keywords: kbtshoot kbbug kbfix kbqfe kbwinxpsp2fix kbwinxppresp2fix kbhotfixserver KB822829

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