[olug] Machine randomly powers off

[Ben Hollingsworth]

Nope, none of these exist, but those are good to watch out for.

The logs show absolutely nothing related to the shutdown.


On October 17, 2016 10:58:03 PM CDT, Rob Townley <rob.townley at gmail.com> wrote:
>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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-- 
Ben "Obi-Wan" Hollingsworth
obiwan at jedi.com, http://www.jedi.com