Microsoft KB Archive/305933

= USB Devices Stop Working After Resuming from Standby =

Article ID: 305933

Article Last Modified on 1/31/2007

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APPLIES TO


 * Microsoft Windows 2000 Service Pack 1
 * Microsoft Windows 2000 Service Pack 2
 * Microsoft Windows 2000 Advanced Server
 * Microsoft Windows 2000 Advanced Server
 * Microsoft Windows 2000 Service Pack 1
 * Microsoft Windows 2000 Service Pack 2

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This article was previously published under Q305933



SYMPTOMS
When your computer resumes from standby, Universal Serial Bus (USB) devices on all ports may not be properly detected and re-enumerated. Additionally, if you exchange one device for another while your computer is on standby, the new device may not work properly after your computer resumes.

This problem is less likely to occur with devices that are attached to the USB host controller root hub. You can examine how your devices are attached by using Device Manager (click Devices by Connection on the View menu, and then expand the PCI Bus/USB Host Controller object hierarchy). You can start Device Manager from the Hardware tab in the System tool in Control Panel.



CAUSE
This issue occurs because the USB hub driver (Usbhub.sys) does not account for ports that are relatively slow to assert themselves on the USB bus during resume operations.



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 -  22-Aug-2001  10:38  5.0.2195.4211  39,920  Usbhub.sys



STATUS
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 3.



MORE INFORMATION
For additional information about how to obtain a hotfix for Windows 2000 Datacenter Server, click the article number below to view the article in the Microsoft Knowledge Base:

265173 The Datacenter Program and Windows 2000 Datacenter Server Product

For additional information about how to install multiple hotfixes with only one reboot, click the article number below to view the article in the Microsoft Knowledge Base:

296861 Use QChain.exe to Install Multiple Hotfixes with One Reboot

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

Additional query words: kbBaseOS

Keywords: kbbug kbfix kbwin2000presp3fix kbqfe kbwin2000sp3fix kboswin2000fix kbhotfixserver KB305933

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