[Nut-upsuser] USB/UPS connectivity issue on Intel DP55KG Motherboard [DEBUG logs included upsd/upsmon/usbhid-ups]

Justin Piszcz jpiszcz at lucidpixels.com
Wed Oct 21 23:07:10 UTC 2009

On Wed, 21 Oct 2009, Arjen de Korte wrote:

> Citeren Justin Piszcz <jpiszcz at lucidpixels.com>:
>> Even without the poll option, the error persists, but it takes longer to 
>> trigger (3-5 minutes vs. 1-2 minutes @ 5 second follreq)
> Have you also tried setting
>   pollinterval = 10
> in ups.conf, to increase the polling interval for this UPS?
> If this doesn't work either, I fear there is little else we can do for you. 
> Occasionally, the connection may be lost (due to EMI, plugging other devices 
> on the same USB bus, etc), but if this happens almost every minute, there 
> must be something wrong.
> The connection to the UPS should be fairly reliable, if not this is either 
> kernel or hardware related. It doesn't seem to be the first, so your only 
> other option would be to try this on different hardware (which would be a 
> nice test, to see if you don't just happen to have a broken USB controller on 
> your mainboard).
> Best regards, Arjen
> -- 
> Please keep list traffic on the list
> _______________________________________________
> Nut-upsuser mailing list
> Nut-upsuser at lists.alioth.debian.org
> http://lists.alioth.debian.org/mailman/listinfo/nut-upsuser


If there was a problem with the USB bus, would attached CD/DVD & keyboard
and mouse devices / usb sticks also have problems?

I only have problems with the UPS.

I power cycled the UPS and reconnected it, and the problem persists.

Could this be a newly discovered issue with the latest USB chips in the
Intel P55 chipset?


More information about the Nut-upsuser mailing list