Microsoft KB Archive/200583

= The Universal Serial Bus (USB) Wakeup Device Is Unable to Awaken Computer from Hibernation =

Article ID: 200583

Article Last Modified on 1/23/2007

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APPLIES TO


 * Microsoft Windows Millennium Edition
 * Microsoft Windows 98 Second Edition
 * Microsoft Windows 98 Standard Edition

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This article was previously published under Q200583



If this article does not describe your hardware-related issue, please see the following Microsoft Web site to view more articles about hardware:

http://support.microsoft.com/default.aspx/w98?sid=460



SYMPTOMS
If a computer that conforms to the Advanced Configuration and Power Interface (ACPI) specification is configured to awaken from Standby mode by a universal serial bus (USB) device (such as, a USB mouse or USB keyboard), and then the computer goes into the Hibernation mode, the USB device is unable to awaken the computer.



CAUSE
This behavior can occur because USB devices are configured to awaken a computer from an S1 (Standby mode) power state. The Hibernation mode is defined as an S4 power state. Devices that are configured to awaken a computer from the S1 power state cannot awaken a computer that is in the S4 power state.

If the computer is configured to awaken by a device that can only awaken the computer from the S1 power state, and the computer is commanded to enter the S4 power state, the command to enter the S4 power state takes precedence. The computer enters a power state from which it cannot be awakened by the configured wakeup device (for example, a USB device).



WORKAROUND
To work around this behavior, do not command the computer to enter the Hibernation mode (the S4 power state) if you enabled your computer to be awakened by devices (such as, USB devices) that can only awaken the computer from the S1 power state. Instead, you must command the computer to enter the Standby mode (the S1 power state).



STATUS
This behavior is by design for Windows 98 Second Edition and Windows Millennium Edition.

This behavior is also by design for Windows 98; however, a hotfix is available as documented in the following Microsoft Knowledge Base article:

189591 Computer Does Not Resume To Recognize USB Device From Standby



MORE INFORMATION
For additional information about Windows 98 and Windows 98 Second Edition hotfixes, click the article number below to view the article in the Microsoft Knowledge Base:

206071 General Information on Windows 98 and SE Hotfixes

For additional information about Windows ME hotfixes, click the article number below to view the article in the Microsoft Knowledge Base:

295413 General Information About Windows Millennium Edition Hotfixes

Additional query words: HWUSB

Keywords: kbhardware kbpowerman kbprb KB200583

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