If your USB device is connected to a USB port on a portable computer docking station, try to connect the device directly to the USB port on the portable computer. If the hub does not function correctly, you may have to replace the hub. If there are too many devices plugged into the hub, unplug some devices. If the external power supply for the hub is not connected correctly, connect the external power supply correctly. If you verify that the hub is the issue, use one of the following methods, depending on your scenario: If you are using a USB hub, try to use the device without the hub. If you are using a hub, unplug the hub, wait about five seconds, and then plug the hub back in.
Unplug the USB device, wait about five seconds, and then plug the device back in. Important: This is a default power saving setting, disabeling this setting will cause additional battery power consumption when your mobile PC is in Sleep or Hibernation mode and unplugged. Note: You may see multiple listings for USB Root Hub, uncheck this option for all USB Root Hubs. Uncheck the option to Allow the computer to turn off this device to save power and click OK The "Allow the computer to turn off this device to save power" setting in Device Manager may beEnabled.Ĭlick Start, type Device manager in the Search box and then click Device Manager from the returned listĬlick to expand USB Root Hub and click the Power Management tab Important: This is a default power setting, disabeling this setting will cause additional battery power consumption when your mobile PC is in Sleep or Hibernation mode and unplugged. The "USB selective suspends settings" option in the Power Options may be Enabled.Ĭlick Start, type Power Optionsin the Search box and then click Power Options from the returned listĬlick Change plan settings for the selected Power planĮxpand USB settings and then USB selective suspend setting and change the setting to Disabled for the option for On battery: or Plugged in:Ĭlick OK on the Power Settings window and click Save changes on the Edit Plan Settings window
To troubleshoot this problem, try one or more of the following methods: When a Windows 7 or Windows Vista-based PC resumes from sleep or hibernation, the following USB device problems may occur:
This article describes how to troubleshoot problems that may occur in USB devices after a PC running Windows 7 or Windows Vista resumes from sleep or hibernation.
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