[Nut-upsuser] libusb_get_interrupt: error reading from interrupt endpoint /dev/ugen0.1

John Bayly freebsd.ports at tipstrade.net
Thu Mar 24 11:46:12 UTC 2011

On 24/03/2011 02:17, Charles Lepple wrote:
> On Mar 23, 2011, at 12:09 PM, John Bayly wrote:
>> Using an Eaton Evolution S 3000 (usbhid-ups) 2.6.0 on FreeBSD 7.3. 
>> After checking the debug log for an unrelated reason I saw that it 
>> was being swamped by the following message:
> The USB stack in FreeBSD prior to 8.0 did not lend itself to being 
> precisely controlled from userspace by libusb. It sounds like you are 
> seeing slightly different problems than I saw while trying to make 
> tripplite_usb work under FreeBSD, but the common symptom was the 
> interrupt endpoints. (FreeBSD prior to 8.0 seems to poll the endpoints 
> more frequently than userspace code reads from them, and I often saw 
> partial packets dropped when the buffer filled up.)
That was kind of what I'd read. Unfortunately I'm stuck with a pre 8.0 
release for the moment due to ISDN.
> How do things work if you add the "pollonly" option to the 
> configuration file?
I've just tried this, and the USB debug messages stopped on restart. 
Really appreciate the help.

Many thanks,

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