From owner-freebsd-hardware@FreeBSD.ORG  Sat Mar 12 15:59:43 2005
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Date: Sat, 12 Mar 2005 15:59:43 +0000
From: Ben Haysom <ben.haysom@gmail.com>
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Subject: Re: Unclean Reboot For No Apparent Reason
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On Sat, 12 Mar 2005 09:33:45 -0600, Vulpes Velox <v.velox@vvelox.net> wrote:
> On Mon, 7 Mar 2005 17:29:17 +0000
> Ben Haysom <ben.haysom@gmail.com> wrote:
> 
> > Hi
> >
> > A while ago I asked about my 5.3 machine which has taken to
> > rebooting itself during a full portupgrade.Doesn't shut down
> > properly - just resets.
> >
> > I was advised to try a few things.
> >
> > I've done memtest86 from CD, let it do 5 passes and it found no
> > problems. I unplugged both CDs and the Floppy, and tried it, but
> > still did the same. cpuburn seems fine.
> > doing mbmon whilst executing the portupgrade -a command shows the
> > temperature get to around 42.5 before it resets, but it can vary.
> >
> > I'm stuck now... any ideas?
> > Ben Haysom
> 
> Memory tests only proove that that the memory is good, not that the
> hardware the ram is connected to is good. The same for cpuburn. The
> best stress test is running a make buildword, a make install for
> scilab, and a find /. If that does not do it, it is most likely a
> intermitently flakey power supply.

those things  do not do it.
but the maachine is always on and only ever resets during portupgrade -a.
every  time.

B.