Article ID: 330512
Article Last Modified on 8/29/2007
APPLIES TO
- Microsoft Windows XP Home Edition
- Microsoft Windows XP Professional
- Microsoft Windows XP Home Edition
- Microsoft Windows XP Professional
- Microsoft Windows XP Media Center Edition 2002
- Microsoft Windows XP Tablet PC Edition
- Microsoft Windows XP Professional for Itanium-based systems
- Microsoft Windows XP Professional for Itanium-based systems
This article was previously published under Q330512
SYMPTOMS
The processor performance state may not be restored to the maximum state if the CPU runs at 100 percent. This problem occurs if the computer is 100 percent busy when the power policy changes.
CAUSE
This problem may occur if the power policy changes because of an AC/DC transition while the computer is using the "Max Battery" power scheme. When the computer is running at 100 percent CPU usage, the computer never enters the idle loop in which the speed of the CPU is dynamically adjusted based on demand and current policy values. The fix is to set the timer so that Windows changes the speed of the CPU when the timer expires.
RESOLUTION
Service pack information
To resolve this problem, obtain the latest service pack for Microsoft Windows XP. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
322389 How to obtain the latest Windows XP service pack
Hotfix information
A supported hotfix is now available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next service pack that contains this hotfix.
To resolve this problem, submit a request to Microsoft Online Customer Services to obtain the hotfix. To submit an online request to obtain the hotfix, visit the following Microsoft Web site:
Note If additional issues occur or any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. To create a separate service request, visit the following Microsoft Web site:
The English version of this fix has the file attributes (or later) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.
Date Time Version Size File name Platform SP -------------------------------------------------------------------------- 09-Nov-2002 14:09 5.1.2600.105 32,000 Amdk6.sys x86 none 09-Nov-2002 14:09 5.1.2600.105 32,512 Amdk7.sys x86 none 09-Nov-2002 14:09 5.1.2600.105 31,488 Crusoe.sys x86 none 21-Nov-2002 01:37 5.1.2600.107 1,848,320 Ntkrnlmp.exe x86 none 21-Nov-2002 01:38 5.1.2600.107 1,902,080 Ntkrnlpa.exe x86 none 21-Nov-2002 01:38 5.1.2600.107 1,874,944 Ntkrpamp.exe x86 none 21-Nov-2002 01:37 5.1.2600.107 1,879,936 Ntoskrnl.exe x86 none 09-Nov-2002 14:09 5.1.2600.105 36,992 P3.sys x86 none 09-Nov-2002 14:09 5.1.2600.105 30,592 Processr.sys x86 none 09-Nov-2002 10:16 5.1.2600.1142 32,000 Amdk6.sys x86 1 09-Nov-2002 10:16 5.1.2600.1142 32,512 Amdk7.sys x86 1 09-Nov-2002 10:16 5.1.2600.1142 31,488 Crusoe.sys x86 1 19-Nov-2002 01:20 5.1.2600.1143 30,976 Gv3.sys x86 1 08-Dec-2002 20:31 5.1.2600.1149 1,892,352 Ntkrnlmp.exe x86 1 08-Dec-2002 20:31 5.1.2600.1149 1,948,288 Ntkrnlpa.exe x86 1 08-Dec-2002 20:31 5.1.2600.1149 1,921,024 Ntkrpamp.exe x86 1 08-Dec-2002 20:31 5.1.2600.1149 1,924,480 Ntoskrnl.exe x86 1 25-Nov-2002 21:59 5.1.2600.1145 37,632 P3.sys x86 1 09-Nov-2002 10:16 5.1.2600.1142 30,592 Processr.sys x86 1 21-Nov-2002 01:38 5.1.2600.107 5,734,400 Ntkrnlmp.exe IA64 none 21-Nov-2002 01:38 5.1.2600.107 5,677,568 Ntoskrnl.exe IA64 none 09-Nov-2002 16:34 5.1.2600.105 60,032 Processr.sys IA64 none 08-Dec-2002 20:31 5.1.2600.1149 5,791,744 Ntkrnlmp.exe IA64 1 08-Dec-2002 20:31 5.1.2600.1149 5,734,912 Ntoskrnl.exe IA64 1 09-Nov-2002 11:26 5.1.2600.1142 60,032 Processr.sys IA64 1
STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section. This problem was first corrected in Microsoft Windows XP Service Pack 2.
Keywords: kbhotfixserver kbqfe kbwinxpsp2fix kbqfe kbbug kbfix kbwinxppresp2fix KB330512