How To Troubleshoot Windows XP and Advanced Power Management (APM) Support
How To Troubleshoot Windows XP and Advanced Power Management (APM) Support
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The Apmstat.exe file command lets you view a machine's Advanced Power Management (APM) status. This file isn't installed by default on Windows XP and Windows 2000. Instead, the file installs when you install the XP and Win2K support tools, which are in the support\tools folder of your installation CD-ROM. To install these tools, you run the setup program that's in the support\tools folder. If you don't want to install all the support tools, you can manually extract Apmstat from the support.cab file and move it to a location of your choice (no other files are necessary to run the Apmstat command).
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Under Q307525
This article describes how Windows XP installs Advanced Power Management (APM) support.
Windows XP supports the following two methods of power management:
Advanced Configuration and Power Interface (ACPI)
Advanced Power Management (APM)
ACPI is the preferred method for controlling power management. When ACPI support is not installed, Windows XP installs APM when any of the following situations occur:
The computer appears in the Auto-Enable APM list section of the Biosinfo.inf file. The computer passed APM tests and should work with APM. The APM tab is present and enabled in the Power Options tool in Control Panel.
The computer appears in the Disable APM list section of the Biosinfo.inf file. The computer is tested and found to have problems with APM. The APM tab is not present in the Power Options tool in Control Panel.
The computer does not appear in either of the lists, and is considered neutral. The computer is not tested for APM support in Windows XP. The APM tab is present in the Power Options tool in Control Panel, but it is not enabled by default. To configure this option:
In Control Panel, double-click Power Options.
On the APM tab, click Enable Advanced Power Management Support.
Microsoft does not recommend enabling APM support on a computer that is not detected as APM 1.2-compliant. If you experience problems after enabling APM support, disable APM, and contact the manufacturer for an updated BIOS. If a computer is a multiprocessor system, Windows XP does not install APM support.
How to Troubleshoot STOP Errors After Enabling Advanced Power Management
The information in this article applies to:
Microsoft Windows XP Home Edition
Microsoft Windows XP Professional
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