Sorry i kidnap this thread now...
i have a 6904
the frontend can't register
dmesg:
[ 3.931789] TBSECP3 driver 0000:03:00.0: MAC address 00:22:ab:91:a3:7f
[ 3.933578] DVB: Unable to find symbol tas2101_attach()
[ 3.933580] TBSECP3 driver 0000:03:00.0: TBSECP3 frontend 3 attach failed
[ 3.933591] TBSECP3 driver 0000:03:00.0: frontend attach failed
[ 3.933827] TBSECP3 driver 0000:03:00.0: adapter3 attach failed