JSI Tip 8292. If you plug in a USB device immediately after Windows XP comes out of standby, or hibernation, the device is NOT recognized?

Jerold Schulman

July 25, 2004

1 Min Read
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The subject behavior occurs because when waking from the s3 (Standby), or S4 (hibernate) power saving state, your computer may need 5 to 10 seconds before the selective suspend feature of the USB driver stops interfering with new hardware detection.

NOTE: The timing depends on a number of factors:

  • Host controller hardware.

  • Attached hubs.

  • Attached devices.

  • USB driver versions.

  • USB 2.0 support.

  • Other hardware / configuration variables.

To workaround this behavior, use any of the following:

  • Wait 5 - 10 seconds before plugging in the device.

  • Unplug the device and plug it back in.

  • Use Device Manager to Scan for hardware changes.

    • Start / Run / Devmgmt.msc / OK.

    • Use the Action menu to Scan for hardware changes.

    • Close Device Manager.



About the Author

Jerold Schulman

Jerold Schulman

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