scan/scan-s2 doesn't tune, but dvbtune does?

[Michael Akey <akeym@onid.orst.edu>]

I can't get the scan/scan-s2 utilities to lock any transponders 
(DVB-S).  My test satellite is AMC1 103W, the Pentagon Channel tp. This 
is probably some simple user error on my part, but I can't figure it 
out.  I have a Corotor II with polarity changed via serial command to an 
external IRD.  C/Ku is switched by 22KHz tone, voltage is always 18V.  
Ku is with tone off, C with tone on.  Speaking of which, is there a way 
to manually set the tone from the arguments on the scan utilities?

Here's what I've tried and the results:

$ ./scan-s2 -a 0 -v -o zap -l 10750 INIT
API major 5, minor 0
scanning INIT
using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
initial transponder DVB-S  12100000 H 20000000 AUTO AUTO AUTO
initial transponder DVB-S2 12100000 H 20000000 AUTO AUTO AUTO
----------------------------------> Using DVB-S
 >>> tune to: 12100:h:0:20000
DVB-S IF freq is 1350000
 >>> tuning status == 0x03
 >>> tuning status == 0x01
 >>> tuning status == 0x03
 >>> tuning status == 0x01
 >>> tuning status == 0x03
 >>> tuning status == 0x00
 >>> tuning status == 0x01
 >>> tuning status == 0x03
 >>> tuning status == 0x00
 >>> tuning status == 0x00
WARNING: >>> tuning failed!!!
 >>> tune to: 12100:h:0:20000 (tuning failed)
DVB-S IF freq is 1350000
 >>> tuning status == 0x03
 >>> tuning status == 0x01
 >>> tuning status == 0x00
 >>> tuning status == 0x00
...snip...

Same thing happens if I use just 'scan' and not 'scan-s2.'

If I use dvbtune, it works though..

$ dvbtune -f 1350000 -p H -s 20000 -c 0 -tone 0 -m
Using DVB card "Conexant CX24116/CX24118"
tuning DVB-S to L-Band:0, Pol:H Srate=20000000, 22kHz=off
polling....
Getting frontend event
FE_STATUS:
polling....
Getting frontend event
FE_STATUS: FE_HAS_SIGNAL FE_HAS_LOCK FE_HAS_CARRIER FE_HAS_VITERBI 
FE_HAS_SYNC
Bit error rate: 0
Signal strength: 51648
SNR: 26215
FE_STATUS: FE_HAS_SIGNAL FE_HAS_LOCK FE_HAS_CARRIER FE_HAS_VITERBI 
FE_HAS_SYNC
Signal=51648, Verror=0, SNR=26215dB, BlockErrors=0, (S|L|C|V|SY|)
Signal=51776, Verror=0, SNR=26624dB, BlockErrors=0, (S|L|C|V|SY|)

The tuning file 'INIT' contains only the following line:
S 12100000 H 20000000 AUTO

I'm using v4l-dvb drivers from the main repo as of about a week ago.  I 
am running kernel 2.6.32 on Debian testing.  Any help is appreciated 
..and hopefully it's just a simple flub on my part!

--Mike