[mythtv] Problems with QAM scanning on Air2PC

[thor]

Probably for Taylor:

 Snippet of console output from setup program scanning for channels (in a part 
of the channels where there is some actual QAM):

2005-02-19 10:22:39.152 DVB#0 Signal Locked
2005-02-19 10:22:39.311 DVB#0 DVB signal fa20 | snr d976 | ber 6c58 | unc    f
2005-02-19 10:22:39.311 DVB#0 Status: LOCK.
Setting currenTID = 47
2005-02-19 10:22:44.422 DVB#0 DVB signal fff0 | snr  0 | ber    0 | unc    0
2005-02-19 10:22:44.477 DVB#0 Signal Lost
2005-02-19 10:22:44.725 DVB#0 Status: LOCK.
Setting currenTID = 48
2005-02-19 10:22:44.731 DVB#0 Signal Locked
2005-02-19 10:22:49.836 DVB#0 Signal Lost
2005-02-19 10:22:50.090 DVB#0 Signal Locked
2005-02-19 10:22:50.348 DVB#0 DVB signal fb30 | snr dc08 | ber  228 | unc    e
2005-02-19 10:22:50.348 DVB#0 Status: LOCK.
Setting currenTID = 49
2005-02-19 10:22:55.459 DVB#0 DVB signal  0 | snr  0 | ber    0 | unc    0
2005-02-19 10:22:55.460 DVB#0 Signal Lost
2005-02-19 10:22:55.714 DVB#0 Signal Locked
2005-02-19 10:22:55.762 DVB#0 Status: LOCK.
Setting currenTID = 50
2005-02-19 10:23:00.874 DVB#0 Signal Lost
2005-02-19 10:23:01.383 DVB#0 Signal Locked
2005-02-19 10:23:01.383 DVB#0 DVB signal fb40 | snr dcc4 | ber  108 | unc   10
2005-02-19 10:23:01.384 DVB#0 Status: LOCK.
Setting currenTID = 51


 The dtv_multiplex table gets populated, but after the scan there are simply 
no channels listed. As I mentioned on IRC, I have a standalone samsung HDTV 
box, so I know that QAM is working on the cable. 

 You probably need more output than that, but it's not immediately obvious to 
me what I need to do to SIPARSER() and SISCAN() defines in the .h's to make 
them produce more output.

- thor