Article ID: 315502 - View products that this article applies to.
This article was previously published under Q315502
When you return your computer from standby or suspend, your Universal Serial Bus (USB) keyboard may not function. This problem may occur on computers that use the Intel ICH2 chipset for USB functionality.
To resolve this problem, obtain the latest service pack for Windows XP. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
322389The English version of this fix should have the following file attributes or later:
(http://support.microsoft.com/kb/322389/EN-US/ )How to Obtain the Latest Windows XP Service Pack
Date Time Version Size File name ---------------------------------------------------- 30-Jan-2002 18:07 5.1.2600.28 19,200 Usbuhci.sys
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 XP Service Pack 1.
If you configure your Windows XP-based computer to wake on input from a USB device (the keyboard, in this case), the keyboard may remain inactive after you resume the computer from standby or suspend. The USB port remains unusable after this problem occurs. In Device Manager, under the Universal Serial Bus Controller branch, you see an "Unknown" device without an exclamation point. The device status is "No Drivers are installed for this device." Also, no Human Input Devices are listed in Device Manager.
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