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From: mberger@RELAY.NSWC.NAVY.MIL
Newsgroups: comp.sys.sgi
Subject: Re:  Iris Screen
Message-ID: <9101080842.aa04897@VGR.BRL.MIL>
Date: 8 Jan 91 13:22:58 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 7

Our 3030's used to do this (every great once in a while).  To fix it we
would have to enter 'set display' at the prom monitor and hit the reset.
I tried this on our PI and it does not work.  Try 'setenv console G' at
the prom monitor.  Our problem was that the prom environment variables
that are stored in non-volatile RAM would get screwed up.

Hope this helps.