Digite lsmod no terminal e veja se o seu modulo saa7134 ou mesmo o cx88xx é carregado na inicialização.
Se for eu acho que basta vc inclui-lo como no exemplo.
No meu lsmod dá pra ver que o cx88xx já é carregado:
pintinho@ubuntu:~$ lsmod
Module Size Used by
binfmt_misc 12680 1
rfcomm 40856 0
l2cap 25856 5 rfcomm
bluetooth 55908 4 rfcomm,l2cap
ipv6 268960 14
ppdev 10116 0
cpufreq_userspace 5408 0
cpufreq_stats 7360 0
cpufreq_powersave 2688 0
cpufreq_ondemand 9228 0
freq_table 5792 2 cpufreq_stats,cpufreq_ondemand
cpufreq_conservative 8200 0
tc1100_wmi 8068 0
pcc_acpi 13184 0
dev_acpi 12292 0
sony_acpi 6284 0
video 16388 0
sbs 15652 0
i2c_ec 6016 1 sbs
dock 10268 0
button 8720 0
battery 10756 0
container 5248 0
ac 6020 0
asus_acpi 17308 0
backlight 7040 1 asus_acpi
fuse 46612 5
lp 12452 0
af_packet 23816 4
snd_via82xx 29208 1
tuner 61864 0
nvidia 4713780 32
snd_via82xx_modem 16008 0
snd_pcm_oss 44544 0
snd_mixer_oss 17408 1 snd_pcm_oss
snd_ac97_codec 98464 2 snd_via82xx,snd_via82xx_modem
snd_mpu401 9256 0
ac97_bus 3200 1 snd_ac97_codec
snd_mpu401_uart 9472 2 snd_via82xx,snd_mpu401
cx8800 35212 0
cx88xx 67364 1 cx8800
snd_pcm 79876 4 snd_via82xx,snd_via82xx_modem,snd_pcm_oss,snd_ac97_codec
snd_seq_dummy 4740 0
analog 12832 0
snd_seq_oss 32896 0
ir_common 31236 1 cx88xx
gameport 16520 2 snd_via82xx,analog
snd_seq_midi 9600 0
snd_rawmidi 25472 2 snd_mpu401_uart,snd_seq_midi
pcspkr 4224 0
parport_pc 36388 1
parport 36936 3 ppdev,lp,parport_pc
sky2 43528 0
i2c_algo_bit 8712 1 cx88xx
video_buf 26116 2 cx8800,cx88xx
tveeprom 15888 1 cx88xx
snd_seq_midi_event 8448 2 snd_seq_oss,snd_seq_midi
snd_seq 52592 6 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_seq_midi_event
snd_timer 23684 2 snd_pcm,snd_seq
snd_seq_device 9100 5 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_rawmidi,snd_seq
psmouse 38920 0
serio_raw 7940 0
k8temp 6656 0
compat_ioctl32 2304 1 cx8800
btcx_risc 5896 2 cx8800,cx88xx
videodev 28160 2 cx8800,cx88xx
v4l2_common 25216 3 tuner,cx8800,videodev
v4l1_compat 15236 2 cx8800,videodev
i2c_viapro 10132 0
snd 54020 15 snd_via82xx,snd_via82xx_modem,snd_pcm_oss,snd_mixer_oss,snd_ac97_codec,snd_mpu401,snd_mpu401_uart,snd_pcm,snd_seq_oss,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
snd_page_alloc 10888 3 snd_via82xx,snd_via82xx_modem,snd_pcm
i2c_core 22656 7 i2c_ec,tuner,nvidia,cx88xx,i2c_algo_bit,tveeprom,i2c_viapro
soundcore 8672 1 snd
amd64_agp 13700 1
shpchp 34324 0
pci_hotplug 32576 1 shpchp
agpgart 35400 2 nvidia,amd64_agp
tsdev 8768 0
evdev 11008 4
ext3 133128 2
jbd 59816 1 ext3
mbcache 9604 1 ext3
ide_cd 32672 0
cdrom 37664 1 ide_cd
ide_disk 17024 6
ata_generic 9092 0
via82cxxx 10372 0 [permanent]
floppy 59524 0
ehci_hcd 34188 0
uhci_hcd 25360 0
usbcore 134280 3 ehci_hcd,uhci_hcd
generic 5124 0 [permanent]
sata_via 12548 0
libata 125720 2 ata_generic,sata_via
scsi_mod 142348 1 libata
thermal 14856 0
processor 31048 1 thermal
fan 5636 0
fbcon 42656 0
tileblit 3584 1 fbcon
font 9216 1 fbcon
bitblit 6912 1 fbcon
softcursor 3200 1 bitblit
vesafb 9220 0
capability 5896 0
commoncap 8192 1 capability