Symptoms

Assume that you have a computer that is running Windows 7 or Windows Server 2008 R2. The computer is running on a chipset that reserves memory for an integrated Graphics Processing Unit (GPU) that does not support Aperture memory-mapped I/O (MMIO) range. For example, the computer has an Intel GMA 3600 GPU installed.

In this situation, Windows reports that less memory is installed on the computer than is actually installed on the computer.

Cause

This issue occurs because Windows locks the primary surface, and then uses the CpuTranslatedAddress address to shadow the primary surface. Therefore, the primary surface is exclusively allocated from a segment of memory that is visible to the CPU.

Note Most Integrated GPUs have an Aperture MMIO range. In this situation, Windows must reserve memory at startup, and expose the reserved memory as a dedicated memory segment. By default, a primary surface must be located in a segment of memory that is visible to the CPU. This is a segment of linear memory space that the GPU has exposed by using a CpuTranslatedAddress address.

Resolution

After you install this hotfix, Windows 7 and Windows Server 2008 R2 support primary surfaces for GPUs that do not have an Aperture MMIO range.

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=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 be running Windows 7 Service Pack 1 (SP1) or Windows Server 2008 R2 Service Pack 1 (SP1).

For more information about how to obtain a Windows 7 or Windows Server 2008 R2 service pack, click the following article number to view the article in the Microsoft Knowledge Base:

976932 Information about Service Pack 1 for Windows 7 and for Windows Server 2008 R2

Registry information

To use the hotfix in this package, you do not have to make any changes to the registry.

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace a previously released hotfix.

File information

The global 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 notes


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

    Version

    Product

    Milestone

    Service branch

    6.1.760
    1.17xxx

    Windows 7 and Windows Server 2008 R2

    SP1

    GDR

    6.1.760
    1.21xxx

    Windows 7 and Windows Server 2008 R2

    SP1

    LDR

  • 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 Server 2008 R2 and for Windows 7" 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

Cdd.dll

6.1.7601.17514

107,520

20-Nov-2010

11:56

x86

Dxgkrnl.sys

6.1.7601.17653

728,448

20-Jul-2011

04:31

x86

Dxgmms1.sys

6.1.7601.17653

219,008

20-Jul-2011

04:31

x86

Lddmcore.ptxml

Not applicable

1,151

13-Jul-2009

20:32

Not applicable

Cdd.dll

6.1.7601.17514

107,520

20-Nov-2010

11:56

x86

Dxgkrnl.sys

6.1.7601.21774

729,472

20-Jul-2011

05:53

x86

Dxgmms1.sys

6.1.7601.21774

219,008

20-Jul-2011

05:53

x86

Lddmcore.ptxml

Not applicable

1,151

13-Jul-2009

20:32

Not applicable

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

File name

File version

File size

Date

Time

Platform

Cdd.dll

6.1.7601.17554

144,384

03-Feb-2011

11:25

x64

Dxgkrnl.sys

6.1.7601.17653

982,912

20-Jul-2011

05:51

x64

Dxgmms1.sys

6.1.7601.17653

265,088

20-Jul-2011

05:51

x64

Lddmcore.ptxml

Not applicable

1,151

08-Jul-2010

18:22

Not applicable

Cdd.dll

6.1.7601.17514

144,384

20-Nov-2010

12:55

x64

Dxgkrnl.sys

6.1.7601.21774

983,936

20-Jul-2011

05:27

x64

Dxgmms1.sys

6.1.7601.21774

265,088

20-Jul-2011

05:27

x64

Lddmcore.ptxml

Not applicable

1,151

13-Jul-2009

20:25

Not applicable

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

File name

File version

File size

Date

Time

Platform

Cdd.dll

6.1.7601.17514

347,136

20-Nov-2010

10:06

IA-64

Dxgkrnl.sys

6.1.7601.17653

2,502,016

20-Jul-2011

04:06

IA-64

Dxgmms1.sys

6.1.7601.17653

671,104

20-Jul-2011

04:06

IA-64

Lddmcore.ptxml

Not applicable

1,151

13-Jul-2009

20:25

Not applicable

Cdd.dll

6.1.7601.17514

347,136

20-Nov-2010

10:06

IA-64

Dxgkrnl.sys

6.1.7601.21774

2,504,576

20-Jul-2011

04:24

IA-64

Dxgmms1.sys

6.1.7601.21774

671,616

20-Jul-2011

04:24

IA-64

Lddmcore.ptxml

Not applicable

1,151

13-Jul-2009

20:25

Not applicable

Status

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

More Information

For more information about software update terminology, 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

The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.

Additional file information

Additional file information for Windows 7 and for Windows Server 2008 R2

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

File name

Update.mum

File version

Not applicable

File size

1,622

Date (UTC)

20-Jul-2011

Time (UTC)

08:49

Platform

Not applicable

File name

X86_633c653d8d7be3cd7f59b15ca80b9c1e_31bf3856ad364e35_6.1.7601.17653_none_d36346a4b1dafe7c.manifest

File version

Not applicable

File size

696

Date (UTC)

20-Jul-2011

Time (UTC)

08:49

Platform

Not applicable

File name

X86_8685df001d7ea3ffa96d96ed53070ea1_31bf3856ad364e35_6.1.7601.21774_none_f3fed657966959cb.manifest

File version

Not applicable

File size

696

Date (UTC)

20-Jul-2011

Time (UTC)

08:49

Platform

Not applicable

File name

X86_microsoft-windows-lddmcore_31bf3856ad364e35_6.1.7601.17653_none_ada3c47641f0321b.manifest

File version

Not applicable

File size

13,305

Date (UTC)

20-Jul-2011

Time (UTC)

08:55

Platform

Not applicable

File name

X86_microsoft-windows-lddmcore_31bf3856ad364e35_6.1.7601.21774_none_ae18c1b35b1d231e.manifest

File version

Not applicable

File size

13,305

Date (UTC)

20-Jul-2011

Time (UTC)

08:55

Platform

Not applicable

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

File name

Amd64_683528998ddb1d85abdc58cf657d42a8_31bf3856ad364e35_6.1.7601.21774_none_4614e5aad231049a.manifest

File version

Not applicable

File size

700

Date (UTC)

20-Jul-2011

Time (UTC)

08:49

Platform

Not applicable

File name

Amd64_e78e7e6fead0b84d3e25389f89e76c48_31bf3856ad364e35_6.1.7601.17653_none_75cb321d5a588e50.manifest

File version

Not applicable

File size

700

Date (UTC)

20-Jul-2011

Time (UTC)

08:49

Platform

Not applicable

File name

Amd64_microsoft-windows-lddmcore_31bf3856ad364e35_6.1.7601.17653_none_09c25ff9fa4da351.manifest

File version

Not applicable

File size

13,309

Date (UTC)

20-Jul-2011

Time (UTC)

09:00

Platform

Not applicable

File name

Amd64_microsoft-windows-lddmcore_31bf3856ad364e35_6.1.7601.21774_none_0a375d37137a9454.manifest

File version

Not applicable

File size

13,309

Date (UTC)

20-Jul-2011

Time (UTC)

09:00

Platform

Not applicable

File name

Update.mum

File version

Not applicable

File size

1,832

Date (UTC)

20-Jul-2011

Time (UTC)

08:49

Platform

Not applicable

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

File name

Ia64_4e0419973ae5b09051671f0c3851b4e5_31bf3856ad364e35_6.1.7601.21774_none_0de6040f2915f1dd.manifest

File version

Not applicable

File size

698

Date (UTC)

20-Jul-2011

Time (UTC)

08:49

Platform

Not applicable

File name

Ia64_b069abf0c7bccc35aee8eab8fbb31053_31bf3856ad364e35_6.1.7601.17653_none_ca525dc98ce2ed90.manifest

File version

Not applicable

File size

698

Date (UTC)

20-Jul-2011

Time (UTC)

08:49

Platform

Not applicable

File name

Ia64_microsoft-windows-lddmcore_31bf3856ad364e35_6.1.7601.17653_none_ada5686c41ee3b17.manifest

File version

Not applicable

File size

13,307

Date (UTC)

20-Jul-2011

Time (UTC)

08:49

Platform

Not applicable

File name

Ia64_microsoft-windows-lddmcore_31bf3856ad364e35_6.1.7601.21774_none_ae1a65a95b1b2c1a.manifest

File version

Not applicable

File size

13,307

Date (UTC)

20-Jul-2011

Time (UTC)

08:49

Platform

Not applicable

File name

Update.mum

File version

Not applicable

File size

1,447

Date (UTC)

20-Jul-2011

Time (UTC)

08:49

Platform

Not applicable

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