I have an ATI TV Wonder video capture (TV Tuner) card that has an audio out. It came with a cable to connect that audio out to the Line-in on my sound card (which is integrated into the motherboard... VIA 82xx).

I am using Fedora Core 3 and it successfully found and setup my card for me. It is using the snd_via82xx. I am able to play MP3 files, etc. without a problem and the quality is perfect. However, when I go to watch TV from within Myth TV, there is no audio output at all. I know the problem has something to do with the fact that the TV's audio is coming into my system through the Line-in port of the sound card.

What I am wondering is if there is anything special you have to do to get Linux to recognize input on Line-In... I have Myth TV setup to output its sound to /dev/dsp. I know /dev/dsp is my sound device because doing "cat /dev/urandom > /dev/dsp" makes a horrific static noise in my speakers. Under the alsamixer CLI program, I tried various things such as setting *EVERYTHING* to 100%, as well as just making sure the Line channel was unmuted and 100%. Does anyone know what I need to do to get this Line-In stuff working correctly? Any help would be greatly appreciated.

Demon0

Some info just in case it helps:

Output of /sbin/lspci follows....

00:00.0 Host bridge: VIA Technologies, Inc. VT8377 [KT400/KT600 AGP] Host Bridge
00:01.0 PCI bridge: VIA Technologies, Inc. VT8235 PCI Bridge
00:0d.0 Multimedia video controller: Brooktree Corporation Bt878 Video Capture (rev 11)
00:0d.1 Multimedia controller: Brooktree Corporation Bt878 Audio Capture (rev 11)
00:10.0 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 80)
00:10.1 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 80)
00:10.2 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 80)
00:10.3 USB Controller: VIA Technologies, Inc. USB 2.0 (rev 82)
00:11.0 ISA bridge: VIA Technologies, Inc. VT8235 ISA Bridge
00:11.1 IDE interface: VIA Technologies, Inc. VT82C586A/B/VT82C686/A/B/VT823x/A/C PIPC Bus Master IDE (rev 06)
00:11.5 Multimedia audio controller: VIA Technologies, Inc. VT8233/A/8235/8237 AC97 Audio Controller (rev 50)
00:12.0 Ethernet controller: VIA Technologies, Inc. VT6102 [Rhine-II] (rev 74)
01:00.0 VGA compatible controller: nVidia Corporation NV11DDR [GeForce2 MX 100 DDR/200 DDR] (rev b2)

Also, my Kernel is 2.6.11-1.27_FC3, and I am running the latest version of Fedora Core 3 (all packages are up-to-date).

Take a look at amixer. There should be an option called "Line in" or something similar. THe problem with my card was that, while recognized, there was no sound because this mixer level was set to 0. Try
amixer set "Line in" 80% (switch "Line in" with whatever it is called on your system)

Second thing you can do is make sure that there is any sound at all coming from your TV card. Just plug a headset in there and check it.

Plugging in the headphones worked fine. I then tried a different cable to connect from the two ports and it works now! It seems I had a bad cable...