[Nut-upsuser] Shutdown after 5 minutes?

[Rob]

When I run my PC in windows and pull the plug, the UPS does not shutdown 
  after it's been on battery for more than 5 minutes nor does it 
shutdown after power is restored, so I do not think there is a problem 
with the UPS physically (bad UPS, battery, etc).

However, I did notice that in windows, the default setting for the UPS 
software was to shutdown 5 minutes after power had been removed.  It's 
possible that the UPS defaults to shut down after 5 minutes unless the 
software configures it differently.  That wouldn't explain why it is 
shutting down after power has been restores though.  I'm not even sure 
the UPS is even making it that long in Linux but I admit I didn't time 
it exactly.  It could be exactly 5 minutes.

It seems more likely that a condition may exist similar to what Peter 
suggested, which is there is a signal the managing software should send 
the UPS once power has been restored and/or to configure the settings.

One more difference to note that SHOULDN'T make a difference, but of 
course could.  The only NUT driver that works with this UPS is the 
cpsups driver over a serial connection.  The testing I did in windows 
was done via a USB connection.  The manual/website says that the serial 
connection is for legacy machines and not all functionality is 
supported, but I would hardly guess they meant the functionality I am 
seeing. :)  It is possible, however, that the USB and Serial protocols 
are different or act differently.  I'll try rebooting into windows when 
I get the time and run a test with the serial connection.  While I do 
that, how would I snoop on the serial line to capture the traffic 
between my PC and the UPS?

Rob

Michelle Dupuis wrote:
> If the Windows comment is accurate (i.e. does not happen under windows) then
> disregard this comment.  Otherwise...
> 
> We've seen a UPS with a new set of batteries, reporting full charge.  Then
> when under load (upon power failure) the unit shuts off.  The root cause was
> one of the 4 batteries in the unit was defective.  Although it showed full
> voltage, it collapsed under load causing the UPS to turn off immediately.
> Replacing the battery solved the problem.
> 
> MD 
> 
> -----Original Message-----
> From: nut-upsuser-bounces at lists.alioth.debian.org
> [mailto:nut-upsuser-bounces at lists.alioth.debian.org] On Behalf Of Doug
> Reynolds
> Sent: Friday, September 15, 2006 5:27 PM
> To: Peter Selinger
> Cc: nut-upsuser at lists.alioth.debian.org
> Subject: Re: [Nut-upsuser] Shutdown after 5 minutes?
> 
> Peter Selinger wrote:
>> After what's been said here, and the data that Rob sent, it seems that
>> the UPSs are faulty; I cannot think of any reason why they should yank
>> the power after 5 minutes, without any warning sign, and with brand
>> new batteries. Even stranger that it still does this when the power is
>> interrupted only briefly. It does not appear to be a driver problem,
>> as the situation still occurs even when no computer is attached at
>> all.
>>
>> On the other hand, did someone say that it does *not* do this under
>> Windows?  That seems bizarre. Perhaps there is some proactive (and
>> doubtlessly top-secret) command by which the driver must tell the UPS
>> not to shut down?
>>
>> I would advise to stay away from this brand of UPS.
> thanks for the warning.. :)
> 
> I've been needing to snoop on the com port when the windows program is 
> running.  It _doesn't_ appear to do it when it is being monitored with 
> windows.
> 
> 
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