Microsoft KB Archive/315754

= The processor never switches to the C3 power-saving state when you remove a USB floppy drive from a Toshiba Tecra 9000 portable computer =

Article ID: 315754

Article Last Modified on 5/21/2007

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APPLIES TO


 * Microsoft Windows XP Home Edition
 * Microsoft Windows XP Professional

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This article was previously published under Q315754



SYMPTOMS
After you remove a USB floppy drive from the Toshiba Tecra 9000 portable computer by using the Safely Remove Hardware option in Microsoft Windows XP, the processor may never switch to the C3 power-saving state.



CAUSE
This problem occurs because the USB hub driver does not work. This problem occurs only if you use the Safely Remove Hardware option to remove the floppy drive. If you remove the USB floppy drive while it is running, or if you do not have a USB floppy drive attached to your portable computer at startup, the processor can switch to the C3 power-saving state.



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

File information
The English version of this hotfix 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 ---  01-Apr-2002  22:37  5.1.2600.41   51,584  Usbhub.sys   x86 01-Apr-2002 22:36  5.1.2600.41  134,016  Usbport.sys  x86 02-Apr-2002 01:39  5.1.2600.41   19,200  Usbuhci.sys  x86 01-Apr-2002 22:37  5.1.2600.41  200,704  Usbhub.sys   IA-64 01-Apr-2002 22:36  5.1.2600.41  472,192  Usbport.sys  IA-64 02-Apr-2002 01:39  5.1.2600.41   68,608  Usbuhci.sys  IA-64



STATUS
This problem was first corrected in Microsoft Windows XP Service Pack 1.

Keywords: kbhotfixserver kbqfe kbbug kbfix kboswin2000fix kbwinxpsp1fix KB315754

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