This article describes an issue with iBook (FireWire) computers and Kensington TurboRing trackball drivers.

Symptom

The iBook (FireWire) computer's trackpad does not respond when Kensington TurboRing trackball drivers are installed. This occurs whether the trackball is connected or not.

Products affected

• iBook (FireWire)
• Kensington TurboRing Trackball
• Mac OS 9

Solution

1. Disable the Kensington ADB Startup extension.

2. Restart the computer.

For more information on extension troubleshooting, please see article 30929: " Mac OS: Extensions Troubleshooting/Extensions Manager Features. "

Note: Check Kensington's Web site at http://www.kensington.com/ for updated driver software.