[Nut-upsuser] USB problems

[Charles Lepple]

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).

-- 
- Charles Lepple