Hello Michael,
You're using "dvb-kernel", right? It might be possible that "zapping" does not check correctly which channel really has a usable tuner.Zapping say only, /dev/video0 is capable of capture 0x0 :-( Any solution?
You need to switch to the right input first. Input 0 is the dvb input, which has no tuner. Use input 1.How do you scan with xawtv for analog senders? scantv from xawtv says only: no tuner found.