Hi folks, I'm looking to buy AverMedia AverTV Studio 305 which is based on saa7130 chip. Kernel identify this tuner automatically, here is what dmesg gives:
I can scan for programs, watch the video but instead of sound I got silence on 2.6.9 or I get white noise on 2.6.8.1(maybe it's not really because of version change but because in 2.6.9 I've put my sound drivers to modules).

I've look for solution on the web but till now I could find something that would help me. Personally I believe that it's something with PAL-BG(which is reported as default) and PAL-DK(which is used by our cable network) but I couldn't find how to switch them. I could be wrong and maybe problem in something different. Anyway I would appreciate any help on this subject.

I was able to resolve this problem myself, it wasn't bug of any kind actually. Indeed problem was in PAL-DK system which didn't appear in XAWTV by default(I've seen only PAL, SECAM and NTSC), but after I've installed Zapping I was able to watch programs with sound on my current kernel (2.6.9) which make me look deeper into documentation on XAW TV, after some looking I've found out that it somehow related to my NVidia card, as when I'm using default kernel video driver I can watch programs with sound and when I install driver sound mistically disappear, after some reading it's become obvious that XawTV pick first video device it could found (in this case it pick my NVIdia card). it's easily solved by executing these commands:
xawtv -hwscan (this one would print list of all available video devices)
for me it gives this one:
so next time I run
xawtv -device /dev/video0
everything work like a charm.

hope this info would be useful to someone.