Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!iuvax!rutgers!apple!chuq
From: chuq@Apple.COM (Chuq Von Rospach)
Newsgroups: comp.unix.aux
Subject: Re: Major bug in A/UX 1.1
Keywords: panic, double panic, kernel bus error
Message-ID: <30311@apple.Apple.COM>
Date: 8 May 89 21:02:34 GMT
References: <8150@june.cs.washington.edu>
Distribution: na
Organization: Life is just a Fantasy novel played for keeps
Lines: 43

>I just installed the upgrade from A/UX 1.0.1 to A/UX 1.1 on my 
>4 Mbyte Mac IIx ('030 version of the MacII).  There seems to be
>a serious reliability problem with the new kernel running on my
>computer.  I can make it crash by simply doing the following from
>the shell:

>	% rlogin localhost
>	...
>	% exit

>The machine then dies and prints the error message:
>
>	panic: sbflush 2


I can't reproduce this. 

>I've also seen similar problems when I run the new (color supported)
>X11, running innocuous programs like "plaid" from a remote client.
>The machine bombs and various messages come up:
>
>	Double panic: mget
>
>	Kernel bus error (then a register dump)
>	Double panic: kernel memory management error

I can't reproduce this, either. Both of these error messages are somewhat
indicative of a sytem problem -- I would strongly suggest either a latent
hardware problem (very possibly on the ethernet card) that got tickled by 
the upgrade or a corrupted kernel. Other possibilities might be a memory
problem that passes self-test but occasionally flips a bit or a flakey 68030
chip. 

Since a 1.0.1 kernel works, I'd try building a new 1.1 kernel from scratch
and see whether it works. It sounds like something was corrupted to me.


Chuq Von Rospach      =|=     Editor,OtherRealms     =|=     Member SFWA/ASFA
         chuq@apple.com   =|=  CI$: 73317,635  =|=  AppleLink: CHUQ
      [This is myself speaking. No company can control my thoughts.]

Bookends. What a wonderful thought.