Microsoft KB Archive/905202

= FIX: The Windows CE Terminal Server client may stop responding to user input when audio playback from the Terminal Server host is redirected to the Terminal Server client =

Article ID: 905202

Article Last Modified on 7/25/2006

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APPLIES TO


 * Microsoft Windows CE .NET 4.2

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SYMPTOMS
When audio playback from the Terminal Server host is redirected to the Microsoft Windows CE Terminal Server client, the Terminal Server client may stop responding to user input for a period lasting up to 20 seconds. This problem only occurs when the following conditions are true:
 * Local audio is played at the same time as a short audio clip from the remote session. Examples of local audio are a key click or a touch click.
 * The audio driver is based on the model device driver/platform-dependent driver (MDD/PDD) model for audio driver design. This problem does not occur when you use the unified driver model for the audio driver.



CAUSE
A race condition in the software mixer lets two threads wait on the same event at the same time. However, only one thread is signaled to continue when the event occurs.



Software update information
A supported software update is now available from Microsoft as Windows CE .NET 4.2 Core OS QFE 905202. To resolve this problem immediately, click the following article number for information about obtaining Windows CE Platform Builder and core operating system software updates:

837392 How to locate core operating system fixes for Microsoft Windows CE Platform Builder products

Prerequisites
This update is supported only if all previous updates for this product are installed.

Restart requirement
After you install this update, you must perform a clean build of the whole platform. To clean the platform, click Clean on the Build menu. To build the platform, click Build Platform on the Build menu. You do not have to restart the computer after you apply this update.

Update replacement information
This update does not replace any other updates.

File information
The English version of this package has the file attributes (or later file attributes) that are listed in the following table.   Date         Time   Size       File name --  19-Aug-2005  19:46  7,476,736  Wincepb42-050819-kb905202-armv4.msi 19-Aug-2005 19:47  7,477,248  Wincepb42-050819-kb905202-armv4i.msi 19-Aug-2005 19:47  7,481,344  Wincepb42-050819-kb905202-mipsii.msi 19-Aug-2005 19:47  7,481,344  Wincepb42-050819-kb905202-mipsii_fp.msi 19-Aug-2005 19:47  7,483,904  Wincepb42-050819-kb905202-mipsiv.msi 19-Aug-2005 19:47  7,483,904  Wincepb42-050819-kb905202-mipsiv_fp.msi 19-Aug-2005 19:46  7,470,592  Wincepb42-050819-kb905202-sh3.msi 19-Aug-2005 19:46  7,470,080  Wincepb42-050819-kb905202-sh4.msi 19-Aug-2005 19:46  7,457,792  Wincepb42-050819-kb905202-x86.msi The English version of this update has the file attributes (or later file attributes) 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   Size     File name ---  Path: Public\Common\Oak\Lib\Armv4\Debug 08-Aug-2005 21:30  226,472  Swmixer.lib

Path: Public\Common\Oak\Lib\Armv4\Retail 08-Aug-2005 21:30  137,238  Swmixer.lib

Path: Public\Common\Oak\Lib\Armv4i\Debug 08-Aug-2005 21:30  226,884  Swmixer.lib

Path: Public\Common\Oak\Lib\Armv4i\Retail 08-Aug-2005 21:30  137,616  Swmixer.lib

Path: Public\Common\Oak\Lib\Mipsii\Debug 08-Aug-2005 21:30  234,532  Swmixer.lib

Path: Public\Common\Oak\Lib\Mipsii\Retail 08-Aug-2005 21:30  138,690  Swmixer.lib

Path: Public\Common\Oak\Lib\Mipsii_fp\Debug 08-Aug-2005 21:30  234,572  Swmixer.lib

Path: Public\Common\Oak\Lib\Mipsii_fp\Retail 08-Aug-2005 21:30  138,716  Swmixer.lib

Path: Public\Common\Oak\Lib\Mipsiv\Debug 08-Aug-2005 21:30  236,738  Swmixer.lib

Path: Public\Common\Oak\Lib\Mipsiv\Retail 08-Aug-2005 21:30  141,314  Swmixer.lib

Path: Public\Common\Oak\Lib\Mipsiv_fp\Debug 08-Aug-2005 21:30  236,780  Swmixer.lib

Path: Public\Common\Oak\Lib\Mipsiv_fp\Retail 08-Aug-2005 21:30  141,338  Swmixer.lib

Path: Public\Common\Oak\Lib\Sh3\Debug 08-Aug-2005 21:30  205,524  Swmixer.lib

Path: Public\Common\Oak\Lib\Sh3\Retail 08-Aug-2005 21:30  130,544  Swmixer.lib

Path: Public\Common\Oak\Lib\Sh4\Debug 08-Aug-2005 21:30  205,524  Swmixer.lib

Path: Public\Common\Oak\Lib\Sh4\Retail 08-Aug-2005 21:30  130,262  Swmixer.lib

Path: Public\Common\Oak\Lib\X86\Debug 08-Aug-2005 21:30  193,454  Swmixer.lib

Path: Public\Common\Oak\Lib\X86\Retail 08-Aug-2005 21:29  117,428  Swmixer.lib



WORKAROUND
To work around this problem without applying this update, use one of the following methods:  Use the unified driver model for the audio driver.  Disable the software mixer by providing a sample rate that is not valid in the registry. [HKEY_LOCAL_MACHINE\Audio\SoftwareMixer] “SampleRate”=dword:FA00 ; 64KHz, which will not work 



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



MORE INFORMATION
For more 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: kbbug kbfix kbqfe kbpubtypekc KB905202

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