Audio-related applications may experience exception or function failure in Terminal sessions in Windows Server 2008 or in Windows Vista Service Pack 1

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Article ID: 961918 - View products that this article applies to.
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SYMPTOMS

Consider the following scenario:
  • An audio-related application manages a full duplex audio device in Windows Server 2008 or in Windows Vista Service Pack 1 (SP1) Terminal sessions. This audio device supports audio recording and playback.
  • This application performs audio recording and then exits.
  • This application tries to perform audio playback.
In this scenario, the application experiences an error and cannot perform audio playback. You must disconnect and then reconnect the Terminal session to recover from this problem.

CAUSE

This problem occurs because of the endpoint caching feature. Because of this feature, the audio engine does not send the message to close to the audio device immediately after the audio-related application ends in the Terminal session. If the audio-related application is opened again, it experiences an exception because the device is still open.

The endpoint caching feature was introduced in Windows Server 2008 and in Windows Vista for Terminal session performance optimization purposes.

RESOLUTION

Hotfix information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing the problem described in this article. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site:
http://support.microsoft.com/contactus/?ws=support
Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

Important Windows Vista and Windows Server 2008 hotfixes are included in the same packages. However, only one of these products may be listed on the “Hotfix Request” page. To request the hotfix package that applies to both Windows Vista and Windows Server 2008, just select the product that is listed on the page.

Prerequisites

To apply this hotfix on a Windows Vista-based computer, you must have Windows Vista SP1 installed. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
935791 How to obtain the latest Windows Vista service pack
No prerequisites are required for Windows Server 2008-based computers.

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any other hotfixes.

Post-installation instructions

Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
322756 How to back up and restore the registry in Windows

After you install hotfix 961918, you must disable the endpoint caching feature. To do this, change the following registry subkey value to
0b 00 00 00 02 00 00 00 00 00
.

Location:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\MMDevices\Audio\RemoteRender\{6C26BA7D-F0B2-4225-B422-8168C5261E45}\Properties\

Name:
{B3F8FA53-0004-438e-9003-51A46E139BFC},14

Type: REG_BINARY
Value: 0b 00 00 00 02 00 00 00 ff ff (default value)

File information

The English version of this hotfix 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 item in Control Panel.

Windows Vista and Windows Server 2008 file information notes

The .manifest files and the .mum files that are installed in each environment are listed separately in the "Additional file information for Windows Server 2008 and for Windows Vista" section. These files and their associated .cat (security catalog) files are critical to maintaining the state of the updated component. The .cat files are signed with a Microsoft digital signature. The attributes of these security files are not listed.
For all supported 32-bit versions of Windows Server 2008 and of Windows Vista
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Audiocore.mofNot Applicable4,35218-Dec-200720:59Not Applicable
Audiodg.exe6.0.6001.2237588,06412-Feb-200905:40x86
Audioeng.dll6.0.6001.22375397,31212-Feb-200905:41x86
Audiokse.dll6.0.6001.22375274,94412-Feb-200905:41x86
Audioses.dll6.0.6001.22375116,22412-Feb-200905:41x86
Audiosrv.dll6.0.6001.22375314,88012-Feb-200905:41x86
Encdump.dll5.0.1.1169,98412-Feb-200905:41x86
Mmdevapi.dll6.0.6001.22375150,52812-Feb-200905:41x86
Rdpendp.dll6.0.6001.2237591,13612-Feb-200905:41x86
Rdpendp.mofNot Applicable1,12218-Dec-200721:03Not Applicable
For all supported 64-bit versions of Windows Server 2008 and of Windows Vista
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatformService branch
Audiocore.mofNot Applicable4,35218-Dec-200720:59Not ApplicableNot Applicable
Audiodg.exe6.0.6001.22375111,10412-Feb-200906:13x64Not Applicable
Audioeng.dll6.0.6001.22375475,13612-Feb-200906:15x64Not Applicable
Audiokse.dll6.0.6001.22375313,85612-Feb-200906:15x64Not Applicable
Audioses.dll6.0.6001.22375190,97612-Feb-200906:15x64Not Applicable
Audiosrv.dll6.0.6001.22375445,95212-Feb-200906:15x64Not Applicable
Encdump.dll5.0.1.1201,72812-Feb-200906:15x64Not Applicable
Mmdevapi.dll6.0.6001.22375203,26412-Feb-200906:15x64Not Applicable
Rdpendp.dll6.0.6001.2237588,57612-Feb-200906:15x64Not Applicable
Rdpendp.mofNot Applicable1,12218-Dec-200721:03Not ApplicableNot Applicable
Audiocore.mofNot Applicable4,35218-Dec-200720:59Not ApplicableWOW
Audiodg.exe6.0.6001.2237588,06412-Feb-200905:40x86WOW
Audioeng.dll6.0.6001.22375397,31212-Feb-200905:41x86WOW
Audiokse.dll6.0.6001.22375274,94412-Feb-200905:41x86WOW
Audioses.dll6.0.6001.22375116,22412-Feb-200905:41x86WOW
Mmdevapi.dll6.0.6001.22375150,52812-Feb-200905:41x86Not Applicable
For all supported Itanium-based versions of Windows Server 2008
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatformService branch
Audiocore.mofNot Applicable4,35218-Dec-200720:59Not ApplicableNot Applicable
Audiodg.exe6.0.6001.22375282,11212-Feb-200904:46IA-64Not Applicable
Audioeng.dll6.0.6001.22375586,75212-Feb-200904:48IA-64Not Applicable
Audiokse.dll6.0.6001.22375339,96812-Feb-200904:48IA-64Not Applicable
Audioses.dll6.0.6001.22375360,96012-Feb-200904:48IA-64Not Applicable
Audiosrv.dll6.0.6001.22375852,99212-Feb-200904:48IA-64Not Applicable
Mmdevapi.dll6.0.6001.22375435,71212-Feb-200904:48IA-64Not Applicable
Audiocore.mofNot Applicable4,35218-Dec-200720:59Not ApplicableWOW
Audiodg.exe6.0.6001.2237588,06412-Feb-200905:40x86WOW
Audioeng.dll6.0.6001.22375397,31212-Feb-200905:41x86WOW
Audiokse.dll6.0.6001.22375274,94412-Feb-200905:41x86WOW
Audioses.dll6.0.6001.22375116,22412-Feb-200905:41x86WOW
Mmdevapi.dll6.0.6001.22375150,52812-Feb-200905:41x86Not Applicable

WORKAROUND

To work around this problem, you have to disconnect the Terminal session, and then reconnect it.

STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

MORE INFORMATION

Additional file information for Windows Server 2008 and Windows Vista

Additional files for all supported 32-bit versions of Windows Server 2008 and of Windows Vista
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Package_for_kb961918_client_1~31bf3856ad364e35~x86~~6.0.1.0.mumNot Applicable1,80312-Feb-200917:57Not Applicable
Package_for_kb961918_client~31bf3856ad364e35~x86~~6.0.1.0.mumNot Applicable1,43112-Feb-200917:57Not Applicable
Package_for_kb961918_sc_0~31bf3856ad364e35~x86~~6.0.1.0.mumNot Applicable1,42212-Feb-200917:57Not Applicable
Package_for_kb961918_sc~31bf3856ad364e35~x86~~6.0.1.0.mumNot Applicable1,42312-Feb-200917:57Not Applicable
Package_for_kb961918_server_0~31bf3856ad364e35~x86~~6.0.1.0.mumNot Applicable1,90412-Feb-200917:57Not Applicable
Package_for_kb961918_server~31bf3856ad364e35~x86~~6.0.1.0.mumNot Applicable1,43112-Feb-200917:57Not Applicable
Package_for_kb961918_winpesrv_0~31bf3856ad364e35~x86~~6.0.1.0.mumNot Applicable1,42212-Feb-200917:57Not Applicable
Package_for_kb961918_winpesrv~31bf3856ad364e35~x86~~6.0.1.0.mumNot Applicable1,43012-Feb-200917:57Not Applicable
X86_microsoft-windows-audio-audiocore_31bf3856ad364e35_6.0.6001.22375_none_76e2b6bbfdf19c3c.manifestNot Applicable131,59912-Feb-200905:59Not Applicable
X86_microsoft-windows-mmdeviceapi_31bf3856ad364e35_6.0.6001.22375_none_5547362cd2b3b6ec.manifestNot Applicable9,96912-Feb-200906:13Not Applicable
X86_microsoft-windows-t..ices-rdpsounddriver_31bf3856ad364e35_6.0.6001.22375_none_3b0c3fd41356e65e.manifestNot Applicable15,56012-Feb-200906:05Not Applicable
Additional files for all supported 64-bit versions of Windows Server 2008 and of Windows Vista
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Amd64_microsoft-windows-audio-audiocore_31bf3856ad364e35_6.0.6001.22375_none_d301523fb64f0d72.manifestNot Applicable131,64112-Feb-200906:33Not Applicable
Amd64_microsoft-windows-mmdeviceapi_31bf3856ad364e35_6.0.6001.22375_none_b165d1b08b112822.manifestNot Applicable9,99712-Feb-200906:48Not Applicable
Amd64_microsoft-windows-t..ices-rdpsounddriver_31bf3856ad364e35_6.0.6001.22375_none_972adb57cbb45794.manifestNot Applicable15,59712-Feb-200906:39Not Applicable
Package_for_kb961918_client_1~31bf3856ad364e35~amd64~~6.0.1.0.mumNot Applicable1,81512-Feb-200917:57Not Applicable
Package_for_kb961918_client~31bf3856ad364e35~amd64~~6.0.1.0.mumNot Applicable1,43912-Feb-200917:57Not Applicable
Package_for_kb961918_sc_0~31bf3856ad364e35~amd64~~6.0.1.0.mumNot Applicable1,43012-Feb-200917:57Not Applicable
Package_for_kb961918_sc~31bf3856ad364e35~amd64~~6.0.1.0.mumNot Applicable1,43112-Feb-200917:57Not Applicable
Package_for_kb961918_server_0~31bf3856ad364e35~amd64~~6.0.1.0.mumNot Applicable1,91612-Feb-200917:57Not Applicable
Package_for_kb961918_server~31bf3856ad364e35~amd64~~6.0.1.0.mumNot Applicable1,43912-Feb-200917:57Not Applicable
Package_for_kb961918_winpesrv_0~31bf3856ad364e35~amd64~~6.0.1.0.mumNot Applicable1,43012-Feb-200917:57Not Applicable
Package_for_kb961918_winpesrv~31bf3856ad364e35~amd64~~6.0.1.0.mumNot Applicable1,43812-Feb-200917:57Not Applicable
Wow64_microsoft-windows-audio-audiocore_31bf3856ad364e35_6.0.6001.22375_none_dd55fc91eaafcf6d.manifestNot Applicable122,43512-Feb-200905:49Not Applicable
X86_microsoft-windows-mmdeviceapi_31bf3856ad364e35_6.0.6001.22375_none_5547362cd2b3b6ec.manifestNot Applicable9,96912-Feb-200906:13Not Applicable
Additional files for all supported Itanium-based versions of Windows Server 2008
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Ia64_microsoft-windows-audio-audiocore_31bf3856ad364e35_6.0.6001.22375_none_76e45ab1fdefa538.manifestNot Applicable129,67812-Feb-200905:03Not Applicable
Ia64_microsoft-windows-mmdeviceapi_31bf3856ad364e35_6.0.6001.22375_none_5548da22d2b1bfe8.manifestNot Applicable9,98312-Feb-200905:14Not Applicable
Package_for_kb961918_sc_0~31bf3856ad364e35~ia64~~6.0.1.0.mumNot Applicable1,42512-Feb-200917:57Not Applicable
Package_for_kb961918_sc~31bf3856ad364e35~ia64~~6.0.1.0.mumNot Applicable1,42712-Feb-200917:57Not Applicable
Package_for_kb961918_server_0~31bf3856ad364e35~ia64~~6.0.1.0.mumNot Applicable1,42912-Feb-200917:57Not Applicable
Package_for_kb961918_server~31bf3856ad364e35~ia64~~6.0.1.0.mumNot Applicable1,43412-Feb-200917:57Not Applicable
Package_for_kb961918_winpesrv_0~31bf3856ad364e35~ia64~~6.0.1.0.mumNot Applicable1,42612-Feb-200917:57Not Applicable
Package_for_kb961918_winpesrv~31bf3856ad364e35~ia64~~6.0.1.0.mumNot Applicable1,43312-Feb-200917:57Not Applicable
Wow64_microsoft-windows-audio-audiocore_31bf3856ad364e35_6.0.6001.22375_none_dd55fc91eaafcf6d.manifestNot Applicable122,43512-Feb-200905:49Not Applicable
X86_microsoft-windows-mmdeviceapi_31bf3856ad364e35_6.0.6001.22375_none_5547362cd2b3b6ec.manifestNot Applicable9,96912-Feb-200906:13Not Applicable

Properties

Article ID: 961918 - Last Review: October 7, 2011 - Revision: 2.0
APPLIES TO
  • Windows Vista Business
  • Windows Vista Enterprise
  • Windows Vista Home Basic
  • Windows Vista Home Premium
  • Windows Vista Ultimate
  • Windows Vista Business 64-bit Edition
  • Windows Vista Home Basic 64-bit Edition
  • Windows Vista Enterprise 64-bit Edition
  • Windows Vista Home Premium 64-bit Edition
  • Windows Vista Ultimate 64-bit Edition
  • Windows Server 2008 Standard
  • Windows Server 2008 Enterprise
  • Windows Server 2008 Datacenter
  • Windows Server 2008 Standard without Hyper-V
  • Windows Server 2008 Enterprise without Hyper-V
  • Windows Server 2008 Datacenter without Hyper-V
  • Windows Server 2008 for Itanium-Based Systems
Keywords: 
kbautohotfix kbexpertiseinter kbfix kbbug kbqfe KB961918

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