[Nut-upsuser] [UPS on Serial vs. USB] USB slow to update,

Peter Selinger selinger at mathstat.dal.ca
Sat Jan 27 17:14:28 CET 2007

If you are using newhidups/usbhid-ups, the option "-x pollfreq=<value>" 
can be used to set the polling frequency (or put "pollfreq=<value>" 
into ups.conf). The default is 30 seconds. 

-- Peter

Justin Piszcz wrote:
> When I disconnect my UPS from the wall, I have to wait 15-30 seconds 
> before the USB drier 'polls' this information and tells me that the UPS is 
> on battery power (via knutclient or syslog via nut):
> ups at p34 POWER ALERT on Fri Jan 26 12:49:29 EST 2007
> With a serial connection, I would get the alerts IMMEDIATELY (0.5-1 
> seconds) after disconnecting the UPS.  My new machine does not have a 
> serial port built-in, only a serial header, and of course does not come 
> with an included cable, so I chose to use USB.
> My question is, how do I change the polling time that nut uses to poll the 
> device to match that of the serial port?
> The reason I'd like to is I am not going to see any power alerts for 
> unless there is a power outage for longer than 15-30 seconds.
> I've checked the FAQ on this, do I have to change the 'MAXAGE' parameter 
> to force more frequent updates?
> Justin.
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