Microsoft KB Archive/835563

= OpenGL hardware acceleration is unavailable for Windows on Windows 64 in the 64-bit editions of Windows Server 2003 =

Article ID: 835563

Article Last Modified on 7/24/2007

-

APPLIES TO


 * Microsoft Windows Server 2003, Enterprise x64 Edition
 * Microsoft Windows Server 2003, 64-Bit Datacenter Edition

-





SYMPTOMS
OpenGL hardware acceleration is unavailable when you run 32-bit programs in Windows on Windows 64 on a computer that is running Microsoft Windows Server 2003, 64-Bit Edition, or Microsoft Windows Server 2003, 64-Bit Datacenter Edition.

To determine whether you can use OpenGL hardware acceleration, use the DescribePixelFormat function. Examine the pixelformatdescriptor data structure that the function returns. If the PFD_GENERIC_ACCELERATED flag is clear and if the PFD_GENERIC_FORMAT flag is set, Windows on Windows 64 will use software emulation to emulate hardware acceleration.

For more information about the DescribePixelFormat function, visit the following Microsoft MSDN Web site:

http://msdn2.microsoft.com/en-us/library/ms537521.aspx



CAUSE
This problem occurs because OpenGL hardware acceleration is not implemented for Windows on Windows 64 in Windows Server 2003, 64-Bit Enterprise Edition, or in Windows Server 2003, 64-Bit Datacenter Edition.

Microsoft Windows on Windows 64 is a 32-bit Windows subsystem that allows you to run 32-bit programs on 64-bit versions of Windows. The current implementation of Windows on Windows 64 uses software emulation to emulate OpenGL acceleration. This process affects how 32-bit programs run, and performance may not meet your expectations. Additionally, you may experience unexpected behavior when you run 32-bit programs on 64-bit versions of Windows.



Hotfix Information
A supported hotfix is now 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 this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next service pack that contains this hotfix.

To resolve this problem, submit a request to Microsoft Online Customer Services to obtain the hotfix. To submit an online request to obtain the hotfix, visit the following Microsoft Web site:

http://go.microsoft.com/?linkid=6294451

Note If additional issues occur or 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. To create a separate service request, visit the following Microsoft Web site:

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

Prerequisites
No prerequisites are required.

Restart requirement
You do not have to restart your computer after you apply this hotfix.

Hotfix replacement information
This hotfix does not replace any other hotfixes.

File information
The English version of this hotfix has the file attributes (or later) 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   Version         Size     File name      Platform 04-Feb-2004 22:04  5.2.3790.125    380,928  Glu32.dll      IA-64 04-Feb-2004 22:04  5.2.3790.125     27,136  Mcd32.dll      IA-64 04-Feb-2004 22:04  5.2.3790.125  2,027,520  Opengl32.dll   IA-64 04-Feb-2004 22:08  5.2.3790.125    118,272  Wglu32.dll     x86 04-Feb-2004 22:08  5.2.3790.125     11,264  Wmcd32.dll     x86 04-Feb-2004 22:08  5.2.3790.125    685,056  Wopengl32.dll  x86



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



MORE INFORMATION
For additional 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

Additional query words: Win2003 win2k3 WOW

Keywords: kbhotfixserver kbqfe kbbug kbfix kbqfe kbwinserv2003presp1fix KB835563

-

[mailto:TECHNET@MICROSOFT.COM Send feedback to Microsoft]

© Microsoft Corporation. All rights reserved.