Microsoft KB Archive/247565

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Article ID: 247565

Article Last Modified on 1/25/2007


  • Microsoft Windows 98 Second Edition

This article was previously published under Q247565


An audio device that uses Win32 Driver Model (WDM) drivers may not function properly after one of the following events:

  • Docking or undocking, particularly hot-docking (in which the computer remains running during the docking operation).
  • Power-management actions such as suspending and resuming the computer, or device-specific power-management actions such as setting the device to power-down after a specified period of inactivity.
  • Resource-rebalancing events, which can occur (for example) when a PCCard device is inserted or removed.

Specific symptoms may include:

  • No sounds, or no sounds of a certain type (such as MIDI or Wave audio) may be heard when played in Media Player.
  • Media Player may stop responding, and double-clicking a sound file may not start Media Player to play the sound.
  • The Volume Control settings may change to values other than what you configured, and you may not be able to change them back to your desired settings.


This problem can occur if Windows does not properly re-activate the WDM audio device and all of its associated drivers after one of the preceding events causes the device to become temporarily deactivated.


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:

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 English version of this fix should have the following file attributes or later:

Date Time Version Size File name Platform
1/24/00 1:46pm 4.10.2223 169,376 Portcls.sys Win98 SE


Microsoft has confirmed that this is a problem in Windows 98 Second Edition.


This problem is known to affect the following hardware that uses WDM audio drivers:

  • Yamaha DS-XG chipset
  • VIA 686A / AC-97 audio device
  • Crystal CS4624 PCI audio and CS4297A AC97 codec

For additional information about problems with similar symptoms, click the article numbers below to view the articles in the Microsoft Knowledge Base:

247398 Volume Control Disabled After Rebalance, Refresh, or Hot Dock

247396 Unable to Play MIDI Device After Rebalance, Refresh, or Hot Dock

For additional information about Windows 98 and Windows 98 Second Edition hotfixes, click the article number below to view the article in the Microsoft Knowledge Base:

206071 General Information About Windows 98 and Windows 98 Second Edition Hotfixes

Keywords: kbhotfixserver kbqfe kbfix kbhardware kbprb kbsound KB247565