[Nut-upsuser] Shutdown after 5 minutes?

[Rob]

What would I be looking for that I didn't see in my testing with my 
windows box?  Should I be trying to sniff the serial connection to see 
if the UPS is for some reason sending a weird signal that NUT is 
mis-interpreting?  If so, how would you recommend I do that?

Rob

Peter Selinger wrote:
> That is very odd indeed. Why should the system shut off abruptly? If
> the log shows nothing, then it seems that the UPS just turned off the
> power. 
> 
> I recommend testing this while attaching, say, a lamp to the UPS,
> instead of a computer. (You can still use your computer to monitor the
> UPS, just don't plug it into it!)
> 
> -- Peter
> 
> Rob wrote:
>>> Upsmon is responsible for monitoring and reacting to power events.
>>> See also the man pages for upsmon(8), upsmon.conf(5), upssched(8), and
>>> upssched.conf(5). 
>>>
>>> There could be many reasons your Windows machine lasts longer than
>>> your Linux machine on their respective UPSs. Perhaps the battery on
>>> the second one is older, or has lost some of its charge, or is lower
>>> quality... Batteries tend to wear out quite easily, especially if they
>>> are discharged and recharged a few times.
>>>
>>> Did you try switching the two machines?
>> On my system, I only have 1 UPS and I have monitored it in windows and 
>> in Linux.  In windows, the same set of systems will properly wait until 
>> the designated time to shutdown (>5 minutes).  When I boot into Linux, 
>> my Linux system performs an abrupt poweroff after about 5 minutes.  I 
>> notice that UPS has been shutoff, but that the system has not been 
>> shutdown cleanly as the logs do not show a system shutdown and disks 
>> need to be recovered on bootup.
>>
>> In windows, I monitored the power output and saw that the battery 
>> drained very quickly down to 60%, and then stabilized.  I contacted 
>> CyberPower about this and they stated that this is a normal discharge 
>> pattern for SLA batteries.  Does NUT possibly detect the power drain 
>> rate and perform an action based upon that?  Even if the UPS was sending 
>> a low power indicator, I can't see why NUT wouldn't do a clean shutdown 
>> of the system?
>>
>> Rob
>>
> 
> 
>