[Nut-upsuser] 2.6.31.4: USB/UPS connectivity issue on Intel DP55KG Motherboard [DEBUG logs included upsd/upsmon/usbhid-ups]

[Justin Piszcz]

On Wed, 21 Oct 2009, Justin Piszcz wrote:

>
>
> 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
>
> Hi,
>
> 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?
>
> Justin.
>
>

Is it possible that a different USB Chip may act differently causing this 
problem?  As I noted CD/DVD (USB) and all other USB devices function properly.
E.g. in the future others may have the same issue?

Justin.