A Windows XP-based computer stops responding when the computer tries to enter standby (914028)


The information in this article applies to:

  • Microsoft Windows XP Professional
  • Microsoft Windows XP Home Edition

SYMPTOMS

When a Microsoft Windows XP-based computer tries to enter standby, the computer stops responding (hangs).

CAUSE

This problem occurs when a driver tries to put a universal serial bus (USB) device into a Selective Suspend reduced-power state at the same time that Windows tries to enter standby. Specifically, this problem occurs because of a bug in the USB hub driver.

RESOLUTION

Hotfix information

A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

File information

The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.
File nameFile versionFile sizeDateTimePlatform
Usbhub.sys5.1.2600.284657,98414-Feb-200601:16x86

STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

MORE INFORMATION

In Windows XP, USB devices may support the Selective Suspend feature. A driver that supports the Selective Suspend feature can disable the USB device that the driver controls when the device becomes idle. This is true even when the computer remains in a fully operational power state (S0).

For example, a driver can idle the host controller. A driver can also idle empty USB hubs and certain USB devices that the operating system supports. The Selective Suspend feature conserves battery power in portable computers and in Tablet PC computers. Typically, USB controllers use significant battery power, even when no devices are attached to the computer. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

824684 Description of the standard terminology that is used to describe Microsoft software updates

Modification Type:MajorLast Reviewed:3/4/2006
Keywords:kbQFE kbExpertiseBeginner kbHotfixServer KB914028 kbAudEndUser
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