Oleg Semyonov wrote, On 2/20/2013 12:39 AM:
UPS model: APC Smart-UPS 750 (051D/0002)
But when UPS is offline, status will not change to OB immediately.
After test many times. this delay time didn't have any rules. Maybe
immediately or few seconds or few minutes.
It will cause doing ONBATT action also delayed.
I asked exactly the same question on the 29th of January, and got nothing in
reply.
It doesn't seem to be a bike shedding problem, so nobody bothered, including
developers
(about using non-documented and probably non-supported option value).
http://en.wikipedia.org/wiki/Parkinson's_law_of_triviality
Short solution: set pollinterval=0 in driver configuration. It will report
OB/OL immediately
(but with a bit more CPU load).
Full description: see my question here:
http://lists.alioth.debian.org/pipermail/nut-upsuser/2013-January/008195.html
Does the problem persist outside of a VM?
*
pollfreq*=/num/
Set polling frequency, in seconds, to reduce the USB data flow.
Between two polling requests, the driver will wait for interrupts
(aka UPS notifications), which are data changes returned by the UPS
by itself. This mechanism allow to avoid or reduce staleness
message, due to the UPS being temporarily overloaded with too much
polling requests. The default value is 30 (in seconds).
Sounds like NUT supports interrupts with this driver.
Pollfreq vs. pollinterval, I also wonder what is up with those two options.
Is that a Microlink Smart-UPS? Perhaps one of its compatibility mode
limitations are no interrupts.
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