User Manual

Information Update 1-5
Failure to Load usb-ohci Driver Message on Systems Running
Red Hat Enterprise Linux (Version 2.1)
A failure message may be displayed when Initializing USB controller (usb-ohci)
appears during startup. Update versions of Red Hat Enterprise Linux (version 2.1) prior to Update
4 mistakenly attempt to load this driver for the USB 2.0 controller. Red Hat Enterprise Linux
(version 2.1) does not support USB 2.0. To avoid this erroneous message on versions prior to
Update 4, remove the line in
/etc/modules.conf that causes usb-ohci to load. Otherwise, install
Red Hat Enterprise Linux (version 2.1) Update 4 to resolve the problem.
System Memory Information
Troubleshooting System Memory
The following procedure provides enhanced system memory troubleshooting instructions.
Problem
• Faulty memory module.
• Faulty system board.
• System status indicator is amber.
• System beep code indicates a memory problem.
• Systems management software issues a memory-related message.
Action
Memory-related beep code during system startup.
CAUTION: Only trained service technicians are authorized to remove the system cover and access any
of the components inside the system. See your Product Information Guide for complete information
about safety precautions, working inside the computer, and protecting against electrostatic discharge.
1
Turn off the system and attached peripherals, and disconnect the system from the electrical
outlet.
2 Open the system. See "Opening the System" in your Installation and Troubleshooting Guide .
3 Reseat the memory modules in their sockets. See "Installing Memory Modules" in your
Installation and Troubleshooting Guide .
4 Close the system. See "Closing the System" in your Installation and Troubleshooting Guide .
5 Reconnect the system to the electrical outlet, and turn on the system and attached
peripherals.
If there is no memory-related beep code, the problem is resolved.