[rescue] U60 Serial Console Question

Phil Stracchino phil.stracchino at speakeasy.net
Tue Apr 3 09:37:19 CDT 2007

Brian Deloria wrote:
> Got an Ultra 60 that crashed over the weekend, left a fatal error FATAL
> after rebooting.  Basically meaning it's the video / cpu / motherboard, more
> likely the cpu/motherboard.  ran a `prtdiag` to see if it was complaining
> about anything, and it wasn't.
> At this point I'm looking to catch the specific crash information, and
> according to what I've read I need to have a serial console connection
> active.  We normally boot the machine with a monitor and keyboard and from
> what I've read if you boot with a framebuffer you can't get console output
> persee.
> At any rate, I'm unsure of the port that I should be connecting to, the
> second thing that I'm unsure of is whether or not it will output the next
> time that it crashes.  At any rate any input would be appreciated, I'd
> prefer to avoid rebooting etc.

Attach a serial cable (null-modem, iirc) to /dev/ttya, protocol is
normally 9600-N-8-1, use tip or dip on the other end.  You'll have to
boot the machine headless for it to work though.  If OpenBoot detects
that a keyboard or monitor is present, it'll use them in preference.

(That can be changed, but you can't do it on the fly while the machine
is running.)

 It's not the years, it's the mileage.
 Phil Stracchino              phil.stracchino at speakeasy.net
 Renaissance Man, Unix generalist, Perl hacker, Free Stater
 Landline: 603-429-0220                Mobile: 603-320-5438

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