I got the latest knoppmyth setup and running with a pvr-150 tuner. Everything was great. I removed the pvr-150 card and tried out my fusion hdtv5 rt gold card. I get video (mythtv) but no sound. I tried the pchdtv card and the same result...video but no sound. I tried the main sound for the computer at the desktop and I get no sound. So when I am using the 2 digital cards I get no sound on the system at all. When I remove the digital cards I get the system sound back. When I use the pvr-150 I get system sound and mythtv sound. I have looked at my irq's and everything is fine there, all separate irq's. I'm using KDE (since I'm new to linux and no very little about the command line) and I found this handy tool called KInfo Center. It gives me the sound device information.
Without the digital tv tuner cards:
Installed driver:
Type 10: ALSA emulation
Card Config:
HDA NVidia at 0xd5000000 irq 17 (onboard audio)
Audio devices:
0: AD198x Analog (DUPLEX)
Synth devices:
NOT ENABLED IN CONFIG
Midi devices:
NOT ENABLED IN CONFIG
Timers:
7: system timer
Mixers:
0: Analog devicesAD1986A

With one digital tuner card
Installed driver:
Type 10: ALSA emulation
Card Config:
Conexant CX8801 at 0xd4000000 (the digital card takes over the audio)
Audio devices:
0: CX88 Digital (same here, takes over)
Synth devices:
NOT ENABLED IN CONFIG
Midi devices:
NOT ENABLED IN CONFIG
Timers:
7: system timer
Mixers:
0: CX88 (again, takes over)

It seems that the digital card is overiding the onboard audio.
Please advise.
Thanks

Search the upgrade hints posting for the word "blacklist".

Thanks for the reply.
It looks like several other people have had this problem: The cx88 alsa of the tuner card takes over the main audio. There seems to be no fix for problem at the time only a work around by blacklising the cx88 alsa from loading which means no analog tv sound. I really would like a fix since I use analog tv. I have posted this on the pcHDTV site and hope to get a reply soon.
Since I'm new to linux would some post with some detail how to blacklist the cx88 alsa and whatever other steps need to be taken to apply this workaround?
Thanks

I ended up finding something on this in the lastest upgrade info and it is now blacklisted. If anyone finds the fix so that analog can be use again please post it.
Thanks