Re: Netbsd v 8.0 fails to boot on spare ultra 45

["Michael L. Hitch" <mhitch%NetBSD.org@localhost>]

On Tue, 23 Oct 2018, Eduardo Horvath wrote:

> On Tue, 23 Oct 2018, Glenn Mawby wrote:
>
> > Hi,
> > I???ve a spare ultra 45 with one cpu, 5gig ram and a xvr-2500 graphics card.
> >
> > I???ve tried to boot a fresh burn of Netbsd spare 64 version 8.
> >
> > It starts to boot but I get Error: Software initiated reset has occurred and it reboots.  Any ideas?
>
> SIR is an indication the kernel got seriously stuffed up in trap
> handling code.  And it doesn't look like OBP properly recovered since
> you're not getting to the `ok' prompt.
>
> How far did it get?  Can you capture the kernel output during boot?
>
> Also, try disconnecting the keyboard and using the serial console.

  I saw this same think back in May - I was trying to get something booted 
on my ultra 45 I had in my office.  I tried an ISO from the daily builds 
and noticed I got an SIR on boot.  I didn't pay much attention to it, as I 
had a disk at home that had a bootable system and used it.

  A couple of weeks ago, I decided to turn on the ultra 45 at home, and 
since it had a build environment on it (from 2014), I thought I try some 
newer kernels.  I set up a build for netbsd-8 and -current and found that 
my netbsd-8 kernel also crashed with the SIR on boot.  I started looking 
into that and determined that it occurred when configureing the audio 
driver.  I got stuck trying to track it through the code, so now I'm 
trying builds of various dates between Sep 2015 (last good kernel I had) 
and Sep 2017.  I would presume the problem is either there when netbsd-8 
was branched, or some pullup done afterwards.  I'm hoping to find the 
exact commit with breaks it and then see how to fix it.

> Not getting to the `ok' prompt makes me suspect the video card, but maybe
> OBP just switches to the serial port after an SIR.

  OBP seems to just reboot the machine with a 'boot' command.

> To diagnose the problem we really need to get the pc value of the SIR
> instruction that was executed.
>
> Eduardo

  I don't see any PC reported when it gets the SIR, so I haven't 
determined exactly where that is occuring.

Mike

---
Michael L. Hitch                        mhitch%montana.edu@localhost
Operations Consulting,  University Information Technology
Montana State University, Bozeman, MT     USA