Microsoft KB Archive/930312

Knowledge Base

The "Allow the computer to turn off this device to save power" power management option for a USB Root Hub does not remain selected after you restart Windows Vista

Article ID: 930312

Article Last Modified on 1/23/2007

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APPLIES TO

• Windows Vista Business
• Windows Vista Enterprise
• Windows Vista Home Basic
• Windows Vista Home Premium
• Windows Vista Ultimate

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SYMPTOMS

In Windows Vista, you click to select the Allow the computer to turn off this device to save power check box. However, when you restart the computer, this check box is cleared.

Note This check box appears on the Power Management tab of a USB Root Hub Properties dialog box. For more information about how to find this check box, see the "More Information" section.

WORKAROUND

To work around this problem, enable the USB selective suspend option. To do this, follow these steps:

1. Click Start, type power options in the Start Search box, and then click Power Options in the Programs list.
   

If you are prompted for an administrator password or confirmation, type your password or click Continue.

1. Under the selected power plan, click Change plan settings.
2. Click Change advanced power settings.
3. In the Power Options dialog box, expand USB settings, and then expand USB selective suspend setting.
4. If you want to enable Windows Vista to turn off the USB root hub when the computer is running on battery power, click Enabled in the On battery list.
5. If you want to enable Windows Vista to turn off the USB root hub when the computer is plugged in to a power outlet, click Enabled in the Plugged in list, and then click OK.

STATUS

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

MORE INFORMATION

To view the Allow the computer to turn off this device to save power check box, follow these steps:

1. Click Start, type device manager in the Start Search box, and then click Device Manager in the Programs list.
   

If you are prompted for an administrator password or confirmation, type your password or click Continue.

1. In the Device Manager dialog box, expand Universal Serial Bus controllers, right-click USB Root Hub, and then click Properties.
2. In the USB Root Hub Properties dialog box, click the Power Management tab. The Allow the computer to turn off this device to save power check box is displayed.

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