I got the same problem and then I've been told to use grundig_29504-401 instead cx22702. It actually bring up a frontend but I'm not able to control the tuning.Oct 8 15:08:19 vigor10 kernel: cx22702: Detected Hauppauge Nova-T DVB-T - PLL Thomson DTT759x Oct 8 15:08:19 vigor10 kernel: cx22702_validate_eeprom eeprom content is not valid