[Nut-upsuser] Panic timeout?

[Dark Penguin]

First of all, please forgive me is this question has already been 
covered in these mailing lists; the "Search mailing list" link is dead, 
and I've only read the most recent monthly archives.


I often have a situation where, for one of many possible reasons, the 
UPS always thinks that its battery is critical. And I'm even fine with a 
situation when it's an emergency shutdown right from the beginning.

However, every once in a while my UPS (APC SU1000) likes to do short 
self-tests, and sometimes my AC power blinks for a split second. Neither 
of those are of any concern, but they make the UPS go into "OB LB" state 
for a few seconds. And just because of something insignificant like 
this, my whole system goes down.

Is there a way to set a timeout for "how long to wait after seeing "OB 
LB" before raising the FSD flag"? I want NUT to be a bit less hasty, and 
only shut down if it sees "OB LB" for at lest ten or even twenty 
seconds. I can easily spare ten more seconds of the critical state, but 
I want to avoid everything going down because of one second in the 
critical state. (That would also allow me to "train" the UPS much easier 
by cutting the power and knowing that I have a few seconds to turn it 
back on once the UPS goes to emergency beeping.)


I thought that's what FINALDELAY on the master is for: upon seeing "OB 
LB", wait for n seconds before deciding that now the time has come to 
start the shutdown. I also thought that's what HOSTSYNC on the slaves is 
for: if we're critical, but the master still hasn't raised the FSD flag 
- then wait a little more and don't panic, unless the master went ahead 
and killed itself. However, what I observe is: the UPS goes into 
"critical" for just a moment; both master and slaves notice it and tell 
the users that they should prepare for shutdown; the next moment, the 
power comes back, but 20 seconds later (FINALDELAY) everything still 
goes down while the power is actually perfectly fine. (I have set the 
polling interval on both master and slaves to one second to ensure they 
don't miss the news about power returning in the last moment.)

I use Debian Stable (Jessie) with NUT 2.7.2-4 from the repo and an APC 
SU1000.


-- 
darkpenguin