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

• Microsoft Windows 98 Second Edition

SYMPTOMS

If your computer contains an audio device that uses Windows Driver Model (WDM) drivers, the sound levels may be set to maximum values and you may be unable to adjust those levels by using the Volume control after you perform 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

   Date        Time      Version     Size     File name 
   -----------------------------------------------------
   12/3/1999   10:22am   4.10.2223   68,800   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).

Additional query words:

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