I have expected something like this:
Code
[12899.205803] dvb-usb: found a 'AverMedia AVerTV Volar Black HD (A850)' in cold state, will try to load a firmware
[12899.205808] usb 2-6: firmware: requesting dvb-usb-af9015.fw
[12899.239949] dvb-usb: downloading firmware from file 'dvb-usb-af9015.fw'
[12899.295180] dvb-usb: found a 'AverMedia AVerTV Volar Black HD (A850)' in warm state.
[12899.295209] dvb-usb: will pass the complete MPEG2 transport stream to the software demuxer.
[12899.295566] DVB: registering new adapter (AverMedia AVerTV Volar Black HD (A850))
[12899.677181] af9013: firmware version:4.95.0
If there are no lines like above it is hard to say (for me) where problem is.