[olug] Machine randomly powers off

[Rob Townley]

Use a LiveCD test.

Unlikely, but a non configured Watch Dog Timer has done this to me, but
usually more uniform power cycle time.
     egrep -R -i '(WD|wdt|tco)' /var/log/*

Is there any vPro or IPMI or DRAC or iLO on the system that could give you
some meta information as to the problem?  IPMI also has watch dog timers.

On Oct 17, 2016 8:09 PM, "Kevin" <sharpestmarble at gmail.com> wrote:

Swap out the PS, see if it runs well with it swapped. You could also try
disconnecting the (spare?) drives and see if it runs fine with just one
drive, possibly booted off a USB thumbdrive or other non-SATA/IDE/etc drive

On Mon, Oct 17, 2016 at 6:44 PM, Jay Bendon <jaybocc2 at gmail.com> wrote:

> check the motherboard for blown caps, test with known good psu.  It is
most
> likely one of the two.  IF you have a good UPS it should prevent most
power
> sags and swells so its probably not external power causing the issue.  I
> assume also its not a thermal shutdown since you said fanspeeds (and
> temps?) are all ok.
>
> --Jay
>
> On Mon, Oct 17, 2016 at 2:11 PM, Chad Homan <choman at gmail.com> wrote:
>
> > I had a similar issue, but it turned out to be a dimm chip going, does
it
> > hurt to run memtest just saying
> >
> > On Oct 17, 2016 3:45 PM, "Jason Troy" <jason.troy at gmail.com> wrote:
> >
> > > +1 to the power supply. That's been my cause on several occasions. I
> > don't
> > > even try the other steps anymore.
> > > You might also inspect Mobo for any bulged caps while you are in
there.
> > >
> > > On Oct 17, 2016 11:50 AM, "Justin Reiners" <justin at hotlinesinc.com>
> > wrote:
> > > >
> > > > Fwiw I'd replace the power supply, they are cheap.
> > > >
> > > > On Oct 17, 2016 11:42 AM, "Ben Hollingsworth" <obiwan at jedi.com>
> wrote:
> > > >
> > > > > Hey all,
> > > > >
> > > > > I'm seeing some weird problems with my desktop box (Ubuntu 16.04),
> > and
> > > I'm
> > > > > not sure what to look for next.  It just randomly (as far as I can
> > > tell)
> > > > > powers off every so often.  It might stay up for a few days, or it
> > > might
> > > > > say up for a few minutes.  I've witnessed it a couple times when
> I'm
> > > using
> > > > > the console, but it usually happens when it's sitting idle.  It
> > always
> > > > > powers on & boots just fine when I press the power button.
> > > > >
> > > > > There's no mention of anything in the OS logs.  The machine just
> dies
> > > cold.
> > > > >
> > > > > MRTG graphs show nothing unusual related to heat, fan speeds, or
> > > > > voltages.  A visual inspection shows all fans spinning.
> > > > >
> > > > > The UPS (which is plenty big & has a new-ish battery) doesn't hint
> of
> > > any
> > > > > problems.  The BIOS is set to power back on if it shuts down due
> to a
> > > power
> > > > > loss, but that doesn't happen, so I don't think it's related to
> > > external
> > > > > power.  I'm running a Seasonic 700W PS that's been working great
> for
> > > > > years.  I do still have my old desktop box from which I could swap
> > the
> > > > > (smaller) PS, but I haven't tried that yet.
> > > > >
> > > > > It has 4 sticks of RAM (2x4GB, 2x8GB), and I've swapped them out
in
> > all
> > > > > combinations, and swapped slots.  Memtest runs for hours with no
> > > errors, so
> > > > > I don't think it's RAM-related.
> > > > >
> > > > > I also still have the mobo/CPU/RAM from my old desktop box (which
> is
> > > > > significantly slower), but those aren't individually
> interchangeable
> > > with
> > > > > the new system.  Swapping all 6 of my hard drives between systems
> is
> > > time
> > > > > consuming, so I'd like to diagnose further before doing that.
> > > > >
> > > > > Before I go randomly replacing expensive or time consuming parts,
> > where
> > > > > else should I be looking for the cause?  This is *really*
annoying!
> > > > >
> > > > > --
> > > > > *Ben "Obi-Wan" Hollingsworth* obiwan at jedi.com <mailto:
> > obiwan at jedi.com>
> > > > > www.Jedi.com <http://www.jedi.com>
> > > > > The stuff of earth competes for the allegiance I owe only to the
> > > > > Giver of all good things, so if I stand, let me stand on the
> > > > > promise that You will pull me through. /-- Rich Mullins/
> > > > >
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