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.
Vintage DEC/CLEARPOINT INC. -QRAM-2 SAB-1 1MB Q-BUS MEMORY MSV11-QA (B2)
$129.99
DEC VINTAGE DIGITAL EQUIPMENT CORPORATION VT100 TERMINAL & KEYBOARD AS-IS
$198.99
DEC PDP 8/M PDP 8M / 4 avail / Vintage Digital Equipment Corp /Also DEC PDP 12
$5775.00
DEC DIGITAL Equipment Corp VT220-D2 Vintage CRT Terminal
$215.00
$39.00
Vintage DEC Digital RX 180 AB Dual 5.25" Disk Drive
$149.00
Vintage Digital DEC dfo1 Acoustic Coupler modem Anderson Jacobsen Mod# A242 RARE
$189.95
Vintage DEC / DIGITAL CLEARPOINT INC COMPUTER BOARD QRAM-11 QBUS Memory PQ
$109.00
Vintage DEC/The Redac mini cabinet front panel Digital Equipment Corp. 19"
$269.99
Vintage DEC DECserver 250 Motorola 68000 print server ST534
$30.00