SYMPTOMS
If you quickly swap a USB device that is attached to a UHCI
USB host controller, the host controller may stop
functioning.
Note "Quickly swap" means that you unplug one USB device and plug in another
USB device within five seconds.
This behavior typically occurs when the following conditions are true:
- If the USB device is programmatically controlled to report
different device IDs, this behavior causes the device to be re-enumerated as a
different device.
- The behavior does not typically occur when you just unplug
one USB device and plug in a different USB device when the steps take longer than five
seconds.
RESOLUTION
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 Microsoft Windows XP 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:
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.
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.
Date Time Version Size File name
--------------------------------------------------------------
18-Mar-2003 05:47 5.1.2600.1187 137,344 Usbport.sys
18-Mar-2003 05:48 5.1.2600.1187 19,328 Usbuhci.sys