[Nut-upsuser] Shutdown after 5 minutes?

[Rob]

> I would try the following: plug your computer into a wall outlet, plug
> a desk lamp into the UPS. First, start the driver and upsd (but not
> upsmon). Monitor the ups variables with upsc. Pull the power, wait 5
> minutes or more, see what happens. Are there changes to ups.status?
> Does the lamp go off? Normally, the lamp should not go off until the
> battery runs out, which should happen some time after ups.status shows
> "LB" (low battery). If the lamp goes off before that, there's a
> problem. 
> 
> Then try the same thing again, this time with upsmon running. When the
> UPS gets to "LB", then upsmon should start slowly shutting down the
> computer. When the computer is in a safe state, the lamp should go off
> (the computer will stay on, as it doesn't know it is not plugged into
> the UPS). 

When I ran the first scenario you outlined, the UPS stayed on for about 
5 minutes (slightly less) and then shut off.  upsmod was not running, 
but upssched was running for a short while (after I removed power) until 
I realized it was running and killed it.  Here is the info from upsc 
during the two relevant points (the second time being just after the UPS 
shut off)

While plugged into the wall:
battery.charge: 100.0
battery.runtime: 64:41
driver.name: cpsups
driver.parameter.port: /dev/ttyS2
driver.version: 2.0.4
driver.version.internal: .04
input.frequency: 60
input.voltage: 122
output.voltage: 122
ups.load: 9
ups.mfr: CyberPower
ups.model: CPS1200VA 1.500
ups.power.nominal: 1200
ups.runtime: 70
ups.status: OL
ups.temperature: 28

After power removed for ~5 minutes:
battery.charge: 65.0
battery.runtime: 46:29
driver.name: cpsups
driver.parameter.port: /dev/ttyS2
driver.version: 2.0.4
driver.version.internal: .04
input.frequency: 0
input.voltage: 0
output.voltage: 0
ups.load: 0
ups.mfr: CyberPower
ups.model: CPS1200VA 1.500
ups.power.nominal: 1200
ups.runtime: 70
ups.status: OB
ups.temperature: 42

I didn't try the second scenario as the first one seemed to highlight an 
issue of some sort and I didn't think the second scenario would add much 
useful info.  Was I correct, or should I also run the second scenario?

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
>>>>
>>>
>>>
> 
> 
>