JSI Tip 9209. When you disconnect a USB 2.0 printer from a USB port on Windows XP, an external USB 2.0 hub connected to a different USB port stops working?

To workaround this problem:

1. Open a CMD.EXE window.

2. Type the following command and press Enter:

REG ADD HKLM\SYSTEM\CurrentControlSet\Services\USB /V DisableSelectiveSuspend /T REG_DWORD /F /D 1

3. You will need to restart Windows XP for this setting to become effective.

NOTE: You may find that this problem also effects a port replicator if it acts as a USB 2.0 hub.

NOTE: Setting DisableSelectiveSuspend to 1 may decrease the battery life on a laptop.

NOTE: Setting DisableSelectiveSuspend to 1 affects all USB host controller drivers on your computer. It removes the Allow the computer to turn off this device to save power box from the Power Management tab of the USB root hub.