Article ID: 330512 - View products that this article applies to.
This article was previously published under Q330512
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.
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.
Service pack informationTo 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:
(http://support.microsoft.com/kb/322389/EN-US/ )How to obtain the latest Windows XP service pack
Hotfix informationA supported hotfix is 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 software update that contains this hotfix.
If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.
Note If additional issues occur or if 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. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site:
http://support.microsoft.com/contactus/?ws=supportNote The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language. 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
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.
Article ID: 330512 - Last Review: August 29, 2007 - Revision: 4.2