Windows XP or Windows Server 2003 does not detect your new USB device (314634)


The information in this article applies to:

  • Microsoft Windows XP Home Edition
  • Microsoft Windows XP Professional
  • Microsoft Windows Server 2003, Standard Edition
  • Microsoft Windows Server 2003, Enterprise Edition
This article was previously published under Q314634
Important This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base:

256986 Description of the Microsoft Windows Registry

SYMPTOMS

When you connect a new Universal Serial Bus (USB) device to a computer that does not have any USB devices, Windows XP Windows Server 2003 may not detect the new device.

CAUSE

This problem may occur because when no device is connected to a USB port, the USB driver sets the OHCI controller to suspend. When the OHCI controller is in a suspend state, it cannot always detect when you add a new USB device to your computer.

RESOLUTION

To resolve this problem, obtain the latest service pack for Windows XP. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

322389 How to obtain the latest Windows XP service pack

Warning If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.
The English version of this fix should have the following file attributes or later:
   Date         Time   Version      Size     File name
   -----------------------------------------------------
   20-Dec-2001  14:56  5.1.2600.26   52,736  Usbhub.sys
   20-Dec-2001  14:56  5.1.2600.26  130,688  Usbport.sys

After you apply the preceding hotfix, you can create a new registry key that prevents an OHCI controller from entering Suspend mode.

Note You do not need to install a hotfix for Microsoft Windows Server 2003 to use this registry setting.
  1. Start Registry Editor (Regedt32.exe).
  2. Locate and then click the following key in the registry:

    HKEY_LOCAL_Machine\SYSTEM\CurrentControlSet\Services\Usb


    Note If this registry key is not present, you must create it.
  3. On the Edit menu, point to New, click DWORD Value, and then add the following registry value:

    Value name: DisableSelectiveSuspend
    Base: Decimal
    Value data: 1

  4. Quit Registry Editor.

STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section. This problem was first corrected in Windows XP Service Pack 1.
Modification Type:MinorLast Reviewed:9/26/2005
Keywords:kbHotfixServer kbQFE kbbug kbenv kbfix kbOSWin2000fix kbui kbWinXPsp1fix KB314634
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