Disabling and Re-enabling APM Alters Power Schemes Timeouts (247020)


The information in this article applies to:

  • Microsoft Windows 2000 Professional
This article was previously published under Q247020

SYMPTOMS

When you disable and then enable advanced power management (APM) on a computer running Microsoft Windows 2000 Professional, the power schemes change. The changes affect the automatic standby and hibernation timeout options and can cause battery power loss.

STATUS

Microsoft has confirmed that this is a problem in Microsoft Windows 2000 Professional.

MORE INFORMATION

The following tables show what the power scheme settings are when you disable or enable APM. Use the appropriate set of steps to view the changes.

To view power scheme changes on a computer that has the APM auto-enable feature:

  1. Install Windows 2000.
  2. In Control Panel, double-click Power Options and then view the power scheme, noting the settings.
  3. Disable APM.
  4. Restart the computer.
  5. Enable APM.
  6. View the power scheme again to see the changes.
Starting Behavior for the Portable/Laptop Scheme

 Plugged InRunning on Batteries
MonitorAfter 15 Min.After 5 Min.
Hard DisksAfter 30 Min.After 5 Min.
StandbyAfter 20 Min.After 5 Min.
HibernationAfter 1 Hr.After 10 Min.

Behavior After Disabling the Portable/Laptop Scheme

 Plugged In
Monitor:After 15 Min.
Hard Disk:After 30 Min.

Behavior After Enabling APM Again

 Plugged InRunning on Batteries
MonitorAfter 15 Min.After 5 Min.
Hard DisksAfter 30 Min.After 5 Min.
StandbyNeverNever
HibernationBLANKAfter 5 Min.

To view power scheme changes on a computer that supports APM but is not auto-enabled:

  1. Install Windows 2000.
  2. In Control Panel, double-click Power Options, and then view the power scheme, noting the settings.
  3. Enable APM.
  4. View the power scheme and note the changes.
  5. Disable APM.
  6. Restart the computer.
  7. Enable APM.
  8. View the power scheme to see the changes.
Starting Behavior for the Home/Office Desk Scheme

 Plugged In
Monitor:After 20 Min.
Hard Disk:Never

Behavior After Enabling APM and Hibernation

 Plugged InRunning on Batteries
Monitor:After 20 Min.After 5 Min.
Hard Disk:NeverAfter 10 Min.
Standby:NeverNever
Hibernation:NeverAfter 15 Min.

Behavior After Disabling the Home/Office Desk Scheme

 Plugged In
Monitor:After 20 Min.
Hard Disk:Never

Behavior After Enabling APM Again

 Plugged InRunning on Batteries
Monitor:After 20 Min.After 5 Min.
Hard Disk:NeverAfter 10 Min.
Standby:NeverNever
Hibernation:NeverNever
Modification Type:MajorLast Reviewed:11/10/2003
Keywords:kbbug kbnofix KB247020
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