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High CPU Utilization on Compaq Laptops When You Play a DVD Movie
Article ID: 282021 - View products that this article applies to.
This article was previously published under Q282021
When you play a DVD movie on a Compaq M700 or E700 laptop computer, CPU usage may reach 100 percent after approximately 15-20 minutes, and this may cause the computer to be very slow or to appear to stop responding (hang).
This problem can occur when Windows 2000 excessively (up to 15 times a second) changes the thermal-management mode of the laptop computer.
To resolve this problem, obtain the latest service pack for Windows 2000. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
260910The English version of this fix should have the following file attributes or later:
(http://support.microsoft.com/kb/260910/EN-US/ )How to Obtain the Latest Windows 2000 Service Pack
Date Time Version Size File name ----------------------------------------------------- 6/21/00 7:29p 5.0.2195.2096 1,658,816 Ntoskrnl.exe 6/21/00 7:29p 5.0.2195.2096 1,680,960 Ntkrnlmp.exe 6/21/00 7:30p 5.0.2195.2096 1,680,960 Ntkrnlpa.exe 6/21/00 7:30p 5.0.2195.2096 1,701,568 Ntkrpamp.exe 6/21/00 7:28p 5.0.2195.2096 163,024 Acpi.sys
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem was first corrected in Windows 2000 Service Pack 2.
Windows 2000 is able to change cooling policies from Active (use fans first) to Passive (use CPU throttling first). Whether Windows 2000 changes the policy, and how often it does so, is based on the power policy that is selected in the Power Options tool in Control Panel.
Under high CPU loads that cause heat increases on Compaq M700 or E700 laptop computers, Windows 2000 may incorrectly begin switching the cooling policy from Active to Passive approximately 15 times a second, and this can cause the high CPU utilization. This normally occurs only when you are playing DVD movies for more than 15 minutes. However, it could potentially occur with some other program that maintains a high CPU utilization for a long period of time.
Note that this problem does not occur with the Always On or Minimal Power Management power schemes.