Summary: Console Noise (Serial) drop into {ok}

From: David Rieger <>
Date: Mon Jul 19 2004 - 11:24:26 EDT
Good day everyone,

A humble thanks to the list for a concerted set of answers and the ability 
to ask questions as well as thanks to the following individuals for their 
time and responses:

Casper Dik
Randy Chatfield
Albert White
Andrew Hay
Ryan A. Krenzischek
Steve Edberg
Brian Miller
Adrian Phillips


Serial line noise seems to be a product of certain pieces of hardware. In 
my case I was using a wintel box (Hyperterminal) and connected to my 
servers with a DB9 connector and x-link 10b/t cable to the serial 
management port on my Sun box over time noise started to emanate and this 
noise began to hit upon a keyboard interrupt sequence that is not a bug but 
a function of debugging per Casper Dik (who responded first with the edit 
/etc/default/kbd suggestion) below.

Lastly, many suggested ensuring the hardware key is set to "locked" as well.

"What you're witnessing is the return to OBP upon receipt of a break
signal; this is a tremendously useful feature when debugging problems;
of course not when it happens by accident.

It's not a bug, it's a feature.

You can configure Solaris not to exit to OBP using "kbd -a alternate"
which switches to the alternate sequence.

In order to make this change persistance across reboots, edit



David Rieger
sunmanagers mailing list
Received on Mon Jul 19 11:25:04 2004

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