HP AD278A and AD279A PCI Multiplexer Support Guide, Edition 2 - September 2006

Troubleshooting
Terminal Login Problems
Chapter 2
29
Terminal Login Problems
Table 2-3 lists the problems you may encounter while logging in to a system:
Table 2-3 Terminal Login Problems
Problems Causes Action
•No login
prompt
• Garbled
message
•Problems
logging in
These problems can occur because of
any of the following reasons:
• Port is not enabled
• Port is set for wrong speed, parity,
character size and so on.
• Cabling problem
• Hardware problem
Perform one of the following actions:
Verify whether the proper getty def
entry is selected for the port in the
/etc/inittab file.
Run the following command from the
console to display the terminal
profile and verify whether the baud
rate, character size, and parity flags
set for the port match the terminal
settings:
stty -a < /dev/tty1a1
Use the pmux_diag utility to send
data to the device for testing. If the
device does not receive data, check for
proper cable connections.
To narrow down the problem further,
swap equipment. Try a different
terminal, cable, and port. A breakout
box is a useful tool for debugging
cabling problems. It shows what
RS-232 signals are sent and received.
Check for console boot messages.