[Pyusb-users] detach kernel driver error No data available

[betoman <be...@gm...>]

hi, I have an IR interface with serial port and usb adapter... i have no
serial port so im tryiing to use it with usb and python...
my problem is that i cannot do anything xD
I tried do this:

*import usb
for bus in usb.busses():
     for dev in bus.devices:
          if dev.idVendor==0x4fc and dev.idProduct==0x201: IR=dev


>>> IR.open().detachKernelDriver(IR.configurations[0].interfaces[0][0])
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
usb.USBError: could not detach kernel driver from interface 0: No data
available

>>> a.open().claimInterface(a.configurations[0].interfaces[0][0])
>>>

>>> a.open().bulkRead(a.configurations
[0].interfaces[0][0].endpoints[0].address,30)
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
usb.USBError: could not detach kernel driver from interface 0: No data
available*

after bulkRead dmesg throws

*usb 1-1: usbfs: process 4886 (python) did not claim interface 0 before use*

and I dont know what i can do

mi kernel : 2.6.22

im using Python 2.4.4


the IR interface is kosmos if anyone knows it...
thanks