Microsoft KB Archive/257484

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Processor Does Not Enter Power Saving Mode

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ID: Q257484

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The information in this article applies to:


 * Microsoft Windows 2000 Professional
 * Microsoft Windows 2000 Server
 * Microsoft Windows 2000 Advanced Server

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SYMPTOMS
Battery usage may be high and the battery may not last as long as you expect. You may see a 25 percent decline in the amount of time you can use the computer when you are using the battery.

CAUSE
The Advanced Configuration and Power Interface (ACPI) BIOS instructs the operating system to place the processor (CPU) in the C2/C3 state. However, the operating system does not place the CPU in the C2/C3 state because of continued bus activity.

RESOLUTION
A supported fix that corrects this problem is now available from Microsoft, but it has not been fully regression tested and should be applied only to systems experiencing this specific problem. If you are not severely affected by this specific problem, Microsoft recommends that you wait for the next Windows 2000 service pack that contains this fix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone numbers and information on support costs, please go to the following address on the World Wide Web:

http://support.microsoft.com/directory/overview.asp

The English version of this fix should have the following file attributes or later:

  Date        Time    Version         Size    File name -  03/14/2000  04:19p  5.00.2195.1301  81,248  Halaacpi.dll 03/14/2000 04:19p  5.00.2195.1301  66,112  Halacpi.dll

STATUS
Microsoft has confirmed this to be a problem in the Microsoft products listed at the beginning of this article.

MORE INFORMATION
For additional information about how to install Windows 2000 and Windows 2000 hotfixes at the same time, click the article number below to view the article in the Microsoft Knowledge Base:

"Q249149 Installing Microsoft Windows 2000 and Windows 2000 Hotfixes" Additional query words:

Keywords : Win2000PreSP1Fix

Version : WINDOWS:2000

Platform : WINDOWS

Issue type : kbbug

Technology : kbvcSearch