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

ID: Q247396

The information in this article applies to:

Microsoft Windows 98 Second Edition

SYMPTOMS

If your computer contains an audio device that uses Windows Driver Model (WDM) drivers, you may be unable to play MIDI files after performing one of the following actions:

You "hot-dock" a portable computer (insert the computer into the dock without shutting down or suspending the computer).

You insert a PC Card after the computer has started and is running Windows.

You disable and re-enable a device in Device Manager.

CAUSE

All of these actions cause hardware resources (IRQs, IO port addresses, and so on) to be rebalanced. When hardware resources are rebalanced, the Windows WDM audio driver (Wdmaud.sys) does not correctly reinitialize itself to allow proper functionality with the new hardware configuration.

RESOLUTION

A supported fix that corrects this problem is now available from Microsoft, but it has not been fully regression tested and should be applied only to systems experiencing this specific problem.

To resolve this problem, contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone numbers and information on support costs, please go to the following address on the World Wide Web:

http://www.microsoft.com/support/supportnet/overview/overview.asp

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


   Date       Time     Version     Size     File name 
   ---------------------------------------------------
   1/3/2000   4:24pm   4.10.2224   68,896   Wdmaud.sys

STATUS

Microsoft has confirmed this to be a problem in the Microsoft products listed at the beginning of this article.

This problem has not been observed with Windows 98 (original edition).

MORE INFORMATION

For additional information about other issues resolved by this update, click the article number below to view the article in the Microsoft Knowledge Base:

Q247398 Volume Control Disabled After Rebalance, Removal, Refresh, or Hot Dock

Additional query words:

Keywords : kbhw kbsound win98se
Version : WINDOWS:
Platform : WINDOWS
Issue type : kbprb