Microsoft KB Archive/261643

= USB Devices Missing in Device Manager After Computer Resumes from Hibernation =

Article ID: 261643

Article Last Modified on 2/20/2007

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APPLIES TO


 * Microsoft Windows 2000 Server
 * Microsoft Windows 2000 Advanced Server
 * Microsoft Windows 2000 Professional Edition

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This article was previously published under Q261643



SYMPTOMS
After a computer resumes from hibernation, Universal Serial Bus (USB) devices may be missing. Device Manager may no longer list the connected USB devices.



CAUSE
When the computer resumes from hibernation, Windows 2000 issues a global reset and then a port reset to the USB controller. During this initialization, the port reset may not succeed and the USB controller may becomes unresponsive to any commands issued to it. This behavior may occur if the motherboard uses the 440BX/443BX chip set with the PIIX4(E) chip set.



RESOLUTION
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:

260910 How to Obtain the Latest Windows 2000 Service Pack

The English version of this fix should have the following file attributes or later:   Date        Time    Version        Size    File name 12/5/2000  07:02p  5.0.2195.3055   32,272  Uhcd.sys

NOTE: There are various USB devices (mouse, keyboard) that may be unresponsive when the computer &quot;wakes&quot; from hibernation mode. In this case, the system will have to be restarted completely (turn off power and turn back on).



STATUS
This behavior is not caused by a problem in Windows 2000. This hotfix is a workaround for computers that experience this condition. This problem was first corrected in Windows 2000 Service Pack 2.



MORE INFORMATION
For additional information about how to install Windows 2000 and Windows 2000 hotfixes at the same time, click the article number below to view the article in the Microsoft Knowledge Base:

249149 Installing Microsoft Windows 2000 and Windows 2000 Hotfixes

Keywords: kbhotfixserver kbqfe kbbug kbfix kbwin2000presp2fix KB261643

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