Audio redirection stops 30 to 60 minutes after you connect to a guest operating system on a Hyper-V host computer that is running Windows

Symptoms

You use Remote Desktop Connection to connect to a guest operating system on a Hyper-V host computer that is running Windows 8.1, Windows Server 2012 R2, Windows 7, or Windows Server 2008 R2. When you connect from a physical Windows 7 client that has audio redirection enabled and the CPU load increases, audio redirection stops after 30 to 60 minutes and does not restart.

Resolution

To resolve this issue in Windows 8.1 and Windows Server 2012 R2, install update 2919355.
To resolve this issue in Windows 7 and Windows Server 2008 R2, install the hotfix that is described in this article.

Update information for Windows 8.1 and Windows Server 2012 R2

For more information about how to obtain update 2919355, click the following article number to view the article in the Microsoft Knowledge Base:

2919355 Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 Update April, 2014

Hotfix information for Windows 7 and Windows Server 2008 R2

A supported hotfix is available from Microsoft Support. 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, go to the following Microsoft website:

http://support.microsoft.com/contactus/?ws=supportNote 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.

Prerequisites

To apply this hotfix, you must have Service Pack 1 for Windows 7 or Windows Server 2008 R2 installed.

Restart requirement

You do not have to restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any previously released hotfix.

The English (United States) version of this hotfix installs files that have the attributes that are listed in the following tables. The dates and the times for these files are listed in Coordinated Universal Time (UTC). The dates and the times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and the times may change when you perform certain operations on the files.

Windows 7 and Windows Server 2008 R2 file information and notesImportant Windows 7 hotfixes and Windows Server 2008 R2 hotfixes are included in the same packages. However, hotfixes on the Hotfix Request page are listed under both operating systems. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows 7/Windows Server 2008 R2" on the page. Always refer to the "Applies To" section in articles to determine the actual operating system that each hotfix applies to.

  • The files that apply to a specific product, SR_Level (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table.

    Version

    Product

    SR_Level

    Service branch

    6.1.760
    1.
    17xxx

    Windows 7 and Windows Server 2008 R2

    SP1

    GDR

    6.1.760
    1.
    22xxx

    Windows 7 and Windows Server 2008 R2

    SP1

    LDR

  • GDR service branches contain only those fixes that are widely released to address widespread, extremely important issues. LDR service branches contain hotfixes in addition to widely released fixes.

  • The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed separately in the "Additional file information for Windows 7 and Windows Server 2008 R2" section. MUM and MANIFEST files, and the associated security catalog (.cat) files, are extremely important to maintain the state of the updated components. The security catalog files, for which the attributes are not listed, are signed with a Microsoft digital signature.

For all supported x86-based versions of Windows 7

File name

File version

File size

Date

Time

Platform

Audiodg.exe

6.1.7601.17514

100,864

20-Nov-2010

12:16

x86

Audioeng.dll

6.1.7601.22578

374,784

22-Jan-2014

02:05

x86

Audiokse.dll

6.1.7601.22578

442,880

22-Jan-2014

02:05

x86

Audioses.dll

6.1.7601.22578

195,584

22-Jan-2014

02:05

x86

Audiosrv.dll

6.1.7601.22578

473,600

22-Jan-2014

02:05

x86

Encdump.dll

5.0.1.1

274,944

22-Jan-2014

02:05

x86

Prod_audio-audiocore.ptxml

Not applicable

667

20-Nov-2010

04:26

Not applicable

For all supported x64-based versions of Windows 7 and Windows Server 2008 R2

File name

File version

File size

Date

Time

Platform

Audiodg.exe

6.1.7601.17514

126,464

20-Nov-2010

13:24

x64

Audioeng.dll

6.1.7601.22578

440,832

22-Jan-2014

02:39

x64

Audiokse.dll

6.1.7601.22578

500,224

22-Jan-2014

02:40

x64

Audioses.dll

6.1.7601.22578

296,448

22-Jan-2014

02:39

x64

Audiosrv.dll

6.1.7601.22578

679,424

22-Jan-2014

02:39

x64

Encdump.dll

5.0.1.1

283,648

22-Jan-2014

02:39

x64

Prod_audio-audiocore.ptxml

Not applicable

667

20-Nov-2010

04:25

Not applicable

For all supported IA-64-based versions of Windows Server 2008 R2

File name

File version

File size

Date

Time

Platform

Audiodg.exe

6.1.7601.22578

323,072

22-Jan-2014

01:46

IA-64

Audioeng.dll

6.1.7601.22578

519,168

22-Jan-2014

01:47

IA-64

Audiokse.dll

6.1.7601.22578

340,480

22-Jan-2014

01:47

IA-64

Audioses.dll

6.1.7601.22578

607,232

22-Jan-2014

01:47

IA-64

Audiosrv.dll

6.1.7601.22578

1,382,912

22-Jan-2014

01:47

IA-64

Prod_audio-audiocore.ptxml

Not applicable

667

20-Nov-2010

04:06

Not applicable

Additional file information

Additional file information for Windows 7 and Windows Server 2008 R2

Additional files for all supported x86-based versions of Windows 7

File name

X86_93f172030314915b11c5f0e8ed2c2079_31bf3856ad364e35_6.1.7601.22578_none_555b30c1212d14df.manifest

File version

Not applicable

File size

703

Date (UTC)

22-Jan-2014

Time (UTC)

07:32

Platform

Not applicable

File name

X86_microsoft-windows-audio-audiocore_31bf3856ad364e35_6.1.7601.22578_none_78f3d3cf5c2ca22b.manifest

File version

Not applicable

File size

88,662

Date (UTC)

22-Jan-2014

Time (UTC)

07:35

Platform

Not applicable

Additional files for all supported x64-based versions of Windows 7 and Windows Server 2008 R2

File name

Amd64_84d3f68671c00a4a7b9d5c3fe66d4569_31bf3856ad364e35_6.1.7601.22578_none_b7a4ecb462406334.manifest

File version

Not applicable

File size

1,056

Date (UTC)

22-Jan-2014

Time (UTC)

07:32

Platform

Not applicable

File name

Amd64_microsoft-windows-audio-audiocore_31bf3856ad364e35_6.1.7601.22578_none_d5126f53148a1361.manifest

File version

Not applicable

File size

88,666

Date (UTC)

22-Jan-2014

Time (UTC)

07:39

Platform

Not applicable

File name

Wow64_microsoft-windows-audio-audiocore_31bf3856ad364e35_6.1.7601.22578_none_df6719a548ead55c.manifest

File version

Not applicable

File size

75,265

Date (UTC)

22-Jan-2014

Time (UTC)

02:37

Platform

Not applicable

Additional files for all supported IA-64-based versions of Windows Server 2008 R2

File name

Ia64_5df8d5c41cbf075b223df555b78758a8_31bf3856ad364e35_6.1.7601.22578_none_c149f46e373f1e6b.manifest

File version

Not applicable

File size

1,054

Date (UTC)

22-Jan-2014

Time (UTC)

07:32

Platform

Not applicable

File name

Ia64_microsoft-windows-audio-audiocore_31bf3856ad364e35_6.1.7601.22578_none_78f577c55c2aab27.manifest

File version

Not applicable

File size

82,335

Date (UTC)

22-Jan-2014

Time (UTC)

02:33

Platform

Not applicable

File name

Wow64_microsoft-windows-audio-audiocore_31bf3856ad364e35_6.1.7601.22578_none_df6719a548ead55c.manifest

File version

Not applicable

File size

75,265

Date (UTC)

22-Jan-2014

Time (UTC)

02:37

Platform

Not applicable

Status

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

References

Learn about the terminology that Microsoft uses to describe software updates.

Need more help?

Expand your skills
Explore Training
Get new features first
Join Microsoft Insiders

Was this information helpful?

Thank you for your feedback!

×