Article ID: 2010159 - View products that this article applies to.
When you restart a computer system several times in quick procession for several minutes, there is a chance that the USB device on the computer system will stop functioning temporarily. This issue may also occur (though more rarely) during normal device operation.
This has been determined to be a result of the Selective Suspend feature on Windows XP mis-behaving as a result of a race condition between USB driver suspend and resume requests.
The simplest resolution involves rebooting the computer. However this cannot be a continuation of the repeated restarts that caused this condition, and if repeated restarts is a permanent function of the computer system, then you might try the more permanent solution below.
The more permanent resolution is to disable the Selective Suspend feature of Windows XP. This has no negative impact on the functioning of the system.
To automatically disable the Selective Suspend feature, click "Fix it for me"
Advanced users can disable the USB Selective Suspend feature manually by editing the registry. The USB device may become unresponsive because of a race condition in the Selective Suspend feature. The Selective Suspend feature suspends the USB device to efficiently maintain battery power by enabling the computer to turn off the USB device. However, sometimes this feature may not correctly wake up the USB device. Therefore, the USB device is unresponsive when you try to use it.
You might want to disable this feature for server products where power management is not important or required.
Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
(http://go.microsoft.com/fwlink/?LinkId=151500)for other considerations.
Article ID: 2010159 - Last Review: December 22, 2009 - Revision: 1.0
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