PPT: Troubleshooting Video Driver UMA Conflicts (139149)


The information in this article applies to:

  • Microsoft PowerPoint for Windows 95
This article was previously published under Q139149

SYMPTOMS

Your system may stop responding when you open or view a presentation containing imported graphics.

CAUSE

This behavior is caused by the expanded memory manager scanning too aggressively and setting up upper memory blocks (UMBs) that conflict with the video adapter.

RESOLUTION

To troubleshoot this problem, try the following:
  1. Open your Config.sys file.
  2. Locate the line similar to:

    device=emm386.exe noems

    Add the following to the end of this line:

    x=a000-c7ff

    This line should now be similar to:

    device=emm386.exe noems x=a000-c7ff

  3. Save the file and restart your computer.

MORE INFORMATION

Windows 95 uses the MS-DOS expanded memory emulation driver, Emm386.exe, to provide expanded memory services (EMS) for MS-DOS applications that need it. If you load Emm386.exe with an x=<range> parameter, Windows 95 doesn't try to put an EMS pageframe in that range of memory addresses.

A standard VGA card requires memory ranges A000-AFFF and B800-BFFF. Some VESA Local Bus and PCI cards use the entire range A000-C7FF.
Modification Type:MinorLast Reviewed:8/17/2005
Keywords:kbenv kbgraphic KB139149
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