[Nut-upsuser] USB problems

[James]

  On 05/10/10 22:09, Charles Lepple wrote:
> On Mon, May 10, 2010 at 8:35 PM, James<bjlockie at lockie.ca>  wrote:
>>   On 05/10/10 14:37, Jason Englander wrote:
>>> On Mon, 10 May 2010, James wrote:
>>>
>>>> Network UPS Tools - UPS driver controller 2.4.3
>>>> Network UPS Tools - Generic HID driver 0.34 (2.4.3)
>>>> USB communication driver 0.31
>>>> Using subdriver: CyberPower HID 0.3
>>>> libusb_get_report: could not claim interface 0: Device or resource busy
>>>> Got disconnected by another driver: Device or resource busy
>>>> Can't initialize data from HID UPS
>>>> Driver failed to start (exit status=1)
>>> FYI, I got that error yesterday with NUT 2.4.3, kernel 2.6.33.3, and a
>>> CyberPower CP1500AVRLCD using usbhid-ups and it seems fine after applying
>>> this patch:
>>>
>>> http://boxster.ghz.cc/projects/nut/changeset/2407?format=diff&new=2407
>> I applied the patch and it loaded the driver once. :-(
>> I had problems with starting upsd so I tried to fix it but I think the
>> driver crashed.
>> Now I can't restart it even after rebooting.
>>
>> nut-2.4.3/drivers $ sudo ./usbhid-ups -a CP550SLG -D -D
>> Network UPS Tools - Generic HID driver 0.34 (2.4.3)
>> USB communication driver 0.31
>>    0.000000     debug level is '2'
>>    0.000408     upsdrv_initups...
>>    0.000583     Checking device (0764/0501) (002/007)
>>    0.000611     - VendorID: 0764
>>    0.000617     - ProductID: 0501
>>    0.000622     - Manufacturer: unknown
>>    0.000626     - Product: unknown
>>    0.000631     - Serial Number: unknown
>>    0.000636     - Bus: 002
>>    0.000640     Trying to match device
>>    0.000655     Device matches
>>    0.000663     failed to claim USB device: could not claim interface 0:
>> Operation not permitted
>>    0.000671     failed to detach kernel driver from USB device: could not
>> detach kernel driver from interface 0: Operation not permitted
> This error is different ("operation not permitted" versus "Device or
> resource busy"). Is your source build using a different user than the
> Gentoo build? (Some distributions have a specific NUT userid instead
> of using "nobody" - not sure how they do it in Gentoo).
>

I'm compiling it with root but I followed the instructions (I think): 
./configure --with-user=ups --with-group=nut

What user should perform the #8 step, /usr/local/ups/bin/upsdrvctl start