[Nut-upsuser] USB/UPS connectivity issue on Intel DP55KG Motherboard
jpiszcz at lucidpixels.com
Thu Oct 15 14:12:02 UTC 2009
On Thu, 15 Oct 2009, Charles Lepple wrote:
> On Oct 13, 2009, at 5:55 PM, Justin Piszcz wrote:
>> I use the following in my ups.conf:
>> # USB:
>> driver = usbhid-ups
>> port = auto
>> desc = "APC 1500VA"
>> pollfreq = 5
> On NUT 2.4.1 (and some older versions), the pollfreq value determines how
> often usbhid-ups explicitly requests all of the values; however, the UPS is
> still free to send interrupt reports at any time within that polling
> interval, and those reports should be processed more frequently.
> Typically, interrupt reports are sent by the UPS when status conditions
> change, so the reporting delay for something like a power failure should be
> well below pollfreq.
> Was there a particular issue that led you to choose "5" for pollfreq? If so,
> what version of NUT were you using at the time?
Yes, I wanted to be able to see power alerts / events when they were short.
When pollfreq is not set, or if it is set too high (e.g. 30 seconds), I do
not get any e-mail if the power goes out and then comes back on very quickly.
Ok, so is this a bug with the USB chipset used on this DP55KG board or is
it a problem with nut? OR did yet another change occur in the kernel usb
driver, I recall before I had to enable a specific option for other
problems I used to have on a different UPS 1-2 years ago.
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