When you disconnect a Microsoft Windows Vista-based portable computer from a docking station, the computer unexpectedly resumes from a sleep state.
This issue occurs when one of the following conditions is true:
- The computer has a USB Universal Host Controller Interface (UHCI) root hub.
- A USB 1.1 device is connected to a port on the USB UHCI root hub. The USB 1.1 device may be connected to any USB hub that is connected to the port on the USB UHCI root hub.
- The USB 1.1 device is configured to wake the computer from the sleep state.
To work around this issue, use one of the following methods:
- Do not use a USB UHCI root hub. Instead, use a high-speed USB Open Host Controller Interface (OHCI) root hub.
- Disable the Allow this device to wake the computer setting for any USB UHCI root hub in Device Manager. To do this, follow these steps:
- Click Start, right-click Computer, and then click Manage.
- In the Navigation Pane, expand System Tools, and then click Device Manager.
- In Device Manager, expand Universal Serial Bus Controllers.
- Double-click the USB root hub that you want to modify, and then click the Power Management tab.
- Click to clear the Allow this device to wake the computer check box, and then click OK.
- Close the Computer Management window.
Article ID: 923943 - Last Review: January 16, 2015 - Revision: 2.3
- Windows Vista Business
- Windows Vista Enterprise
- Windows Vista Home Basic
- Windows Vista Home Premium
- Windows Vista Ultimate
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