Knowledge Base

USB devices may not work after your computer resumes from standby in Windows XP on Lenovo portable computers

Article ID: 945454

Article Last Modified on 12/7/2007

APPLIES TO

Microsoft Windows XP Home Edition
Microsoft Windows XP Professional

SYMPTOMS

Consider the following scenario:

You are using a Lenovo ThinkPad portable computer that has one of the following configurations:
- Windows XP Service Pack 1 (SP1) is installed together with the USB 1.1 and 2.0 Update. For more information about the USB 1.1 and 2.0 Update, click the following article number to view the article in the Microsoft Knowledge Base:
  
  822603 Availability of the Windows XP Service Pack 1 USB 1.1 and 2.0 Update
- Windows XP Service Pack 2 (SP2) is installed together with the USB 1.1 and 2.0 Update. (Windows XP SP2 was installed after the USB update.)
You connect the computer to one of the following docking stations or port replicators:
- ThinkPad Advanced Dock
- ThinkPad Advanced Mini Dock
- ThinkPad Essential Port Replicator
You resume the computer from standby.

In this scenario, USB devices that are connected to your computer and any new USB devices that you connect may not function correctly.

WORKAROUND

To work around this problem, restart the computer. Make sure that you leave all the USB devices plugged into the docking station or into the port replicator. Do not add any new devices until the computer has restarted successfully.

Advanced users section

This section is intended for advanced computer users. If you are not comfortable performing advanced troubleshooting, you may want to contact Microsoft for support. For information about how to do this, visit the following Microsoft Web site:

http://support.microsoft.com/contactus

To work around this problem, use one of the following methods.

Method 1: Do not configure your computer to turn off USB devices to save power while the computer is on standby

Click Start, click Run, type devmgmt.msc, and then click OK.
Double-click Universal Serial Bus Controllers.
Right-click USB Root Hub, and then click Properties.
Click the Power Management tab, and then click to clear the Allow the computer to turn off this device to save power check box.
Repeat steps 3 through 4 for each instance of USB Root Hub that is listed in Device Manager.

Method 2: Scan your computer for new hardware

Click Start, click Run, type devmgmt.msc, and then click OK.
Right-click Universal Serial Bus Controllers, and then click Scan for new hardware.

Method 3: Remove Windows XP SP2, Windows XP SP1, and the USB 1.1 and 2.0 Update, and then reinstall Windows XP SP2

Remove Windows XP SP2. To do this, follow these steps:
1. Click Start, click Run, type appwiz.cpl, and then click OK.
2. Click to select the Show Updates check box.
3. Click Windows XP Service Pack 2, and then click Remove.
4. Follow the instructions on the screen to remove Windows XP SP2. For more information about how to remove Windows XP SP2, click the following article number to view the article in the Microsoft Knowledge Base:
  
  875350 How to remove Windows XP Service Pack 2 from your computer
Manually remove Windows XP SP1. To do this, follow these steps:
1. Insert the Windows XP CD in your computer's CD drive or DVD drive, and then restart your computer. When the "Press any key to boot from CD" message appears on the screen, press a key to start your computer from the Windows XP CD.
  
  Note Your computer must be configured to start from the CD drive or from the DVD drive. For more information about how to configure your computer to start from the CD drive or from the DVD drive, see your computer's documentation, or contact your computer's manufacturer.
  
  You receive the following message on the "Welcome to Setup" screen:
```
This portion of the Setup program prepares Microsoft 
   Windows XP to run on your computer:

   To setup Windows XP now, press ENTER.

   To repair a Windows XP installation using Recovery Console, press R.

   To quit Setup without installing Windows XP, press F3. 
When you receive this message, press ENTER to set up Windows XP
```
2. On the Windows XP Licensing Agreement screen, press F8 to accept the license agreement.
3. Make sure that your current installation of Windows XP is selected, and then press R to repair Windows XP.
4. Follow the instructions on the remaining screens to reinstall Windows XP.
  
  Note After you repair Windows XP, you may have to reactivate your copy of Windows XP.
Remove the USB 1.1 and 2.0 Update. To do this, follow these steps:
1. Click Start, click Run, type appwiz.cpl, and then click OK.
2. In Add or Remove Programs, click Windows XP Hotfix (SP2) Q822603, and then click Remove.
  
  Note System administrators can use the Spunist.exe utility to remove this update. The Spuninst.exe program file is located in the %Windir%\$NTUninstallKB822603$\Spuninst folder. This utility supports the following Setup switches:
  - /? Show the List of installation switches.
  - /u Use Unattended mode.
  - /f Force other programs to close when the computer shuts down.
  - /z Do not restart when installation is complete.
  - /q Use Quiet mode (no user interaction).
Reinstall Windows XP SP2. For more information about Windows XP SP2, visit the following Microsoft Web site:

http://www.microsoft.com/windowsxp/sp2/default.mspx

STATUS

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

MORE INFORMATION

For more information, click the following article number to view the article in the Microsoft Knowledge Base:

839042 USB devices may not work after your Toshiba notebook computer returns from standby in Windows XP

The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.

Keywords: kbtshoot kbprb KB945454

Microsoft KB Archive/945454

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