I assume the sound output of your tv card goes through line in. Try KMix to deselect line in.
I love the new Knoppix DVD but have a problem I haven't encountered with any other distro of Linux - previous Knoppix included:
I have an old ATI TV Card in my computer and when my machine boots with Knoppix, it "senses" the card and immediate begins playing TV sound. If I try to load the TV software xawtv, the software works flawlessly - as good as the MS software that was made for the card. However, if I close the program, the sound stays on until I turn off the machine.
Of course I could mute it, but finding out how to fix the problem is so much more fun.
I assume the sound output of your tv card goes through line in. Try KMix to deselect line in.
IBM Server System X3100 M4 | Xeon @ 3.10 Ghz | 8GB | 250GB HDD No OS (IG-PC26)
$96.01
IBM Power S822 8284-22A 12SFF Power8 3.89GHz 6Core 64GB RAM No HDD Server System
$359.99
IBM System X3250 M3 Server 8GB RAM Intel Xeon x3440 2.53ghz (NO HDD)
$36.53
$4750.00
IBM System x3550 M3 Dual Intel Xeon X5650 @2.67GHz 32GB RAM No HDD
$74.50
IBM VERSION 1.0 EXTENDED SERVICES WITH DATABASE SERVER FOR OS/2 04GG1049 E
$119.00
IBM SYSTEM x3200 M3 Tower- Intel i3 540 @ 3.07GHz, 4GB, 500GB HHD
$125.00
$16000.00
IBM x3650 M4 2x Xeon E5-2670 2.6ghz 16-Core / 64GB / M5110e / 2x PSU
$229.99
IBM x3250 M4 1U Server With Four 2.5" Drive Bays
$299.99