Well, OpenUSB does not work yet, but you could try to use libusb 0.1...
Let us know the results...

Wander


2009/11/10 Steven Michalske <smichal...@gmail.com>:
>> 1) Permissions: does your user have permission to access USB devices.
>
> Not a permissions issue.  it works if i access
> is_kernel_driver_active(0)  on the device before accessing the device.
>
>> 2) Firmware bug: yes, it occurs more often than you can imagine.
>
> I don't own the firmware of the device, but believe that it is mostly stable.
>
>> 3) libusb 1.0 bug: this error feels like more libusb issue than a PyUSB 
>> problem.
>
> This could be,  would you suggest open usb or the earlier libusb?
>
>> 4) PyUSB bug: it the above alternatives do not confirm, I think you
>> have found a bug.
>
> not sure,  lets see if #3 finds anything
>
>
> Steve
>

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