Gracias por responder.
Esto es lo que sale:
carlos@localhost ~ $ **lsmod | grep saa7134**
saa7134_alsa 28672 2
saa7134_dvb 49152 0
videobuf2_dvb 16384 1 saa7134_dvb
saa7134 196608 2 saa7134_dvb,saa7134_alsa
tveeprom 28672 1 saa7134
videobuf2_dma_sg 16384 2 saa7134_dvb,saa7134
videobuf2_v4l2 32768 2 saa7134_dvb,saa7134
videobuf2_common 57344 3 saa7134,videobuf2_v4l2,videobuf2_dvb
videodev 274432 3 saa7134,videobuf2_v4l2,videobuf2_common
mc 61440 5 videodev,saa7134,videobuf2_v4l2,dvb_core,videobuf2_common
snd_pcm 131072 5 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec,saa7134_alsa,snd_hda_core
snd 110592 27 snd_hda_codec_generic,snd_seq,snd_seq_device,snd_hda_codec_hdmi,snd_hwdep,snd_hda_intel,snd_hda_codec,snd_hda_codec_realtek,snd_timer,saa7134_alsa,snd_pcm
carlos@localhost ~ $ **dmesg | grep saa7134**
[ 24.568110] saa7134: saa7130/34: v4l2 driver version 0, 2, 17 loaded
[ 24.568306] saa7134: saa7134[0]: found at 0000:03:07.0, rev: 1, irq: 21, latency: 32, mmio: 0xfdeff000
[ 24.568312] saa7134: saa7134[0]: subsystem: 1461:2c05, board: AverTV DVB-T 777 [card=85,autodetected]
[ 24.568334] saa7134: saa7134[0]: board init: gpio is 2f400
[ 24.717619] rc rc0: lirc_dev: driver saa7134 registered at minor = 0, scancode receiver, no transmitter
[ 24.862442] saa7134: i2c eeprom 00: 61 14 05 2c 00 00 00 00 00 00 00 00 00 00 00 00
[ 24.862444] saa7134: i2c eeprom 10: 00 ff 82 0e ff 20 ff ff ff ff ff ff ff ff ff ff
[ 24.862445] saa7134: i2c eeprom 20: 01 40 01 02 02 03 03 01 08 ff 00 a8 ff ff ff ff
[ 24.862445] saa7134: i2c eeprom 30: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[ 24.862446] saa7134: i2c eeprom 40: ff 32 00 c0 86 1e ff ff ff ff ff ff ff ff ff ff
[ 24.862447] saa7134: i2c eeprom 50: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[ 24.862448] saa7134: i2c eeprom 60: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[ 24.862448] saa7134: i2c eeprom 70: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[ 24.862449] saa7134: i2c eeprom 80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[ 24.862450] saa7134: i2c eeprom 90: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[ 24.862450] saa7134: i2c eeprom a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[ 24.862451] saa7134: i2c eeprom b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[ 24.862452] saa7134: i2c eeprom c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[ 24.862452] saa7134: i2c eeprom d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[ 24.862453] saa7134: i2c eeprom e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[ 24.862454] saa7134: i2c eeprom f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[ 24.862718] saa7134: saa7134[0]: registered device video0 [v4l2]
[ 24.862767] saa7134: saa7134[0]: registered device vbi0
[ 25.021264] saa7134_dvb: dvb_init() allocating 1 frontend
[ 25.173529] dvbdev: DVB: registering new adapter (saa7134[0])
[ 25.173533] saa7134 0000:03:07.0: DVB: registering adapter 0 frontend 0 (Zarlink MT352 DVB-T)...
[ 25.274706] saa7134_alsa: saa7134 ALSA driver for DMA sound loaded
[ 25.274706] saa7134_alsa: saa7134[0]/alsa: saa7134[0] at 0xfdeff000 irq 21 registered as card -1
El caso es que sí que carga el kernel todo lo de saa7134 y el mt352, e incluso kaffeine me detecta el device Zarlink MT352 DVB-T, pero sale pantalla en negro y sin sonido.
Si intento resintonizar todos los canales no reconoce ninguno.