[MythDora] Autoloading modules in 2.6.20

[gchris]

New problem with the HD3000 cards?
I completed basic system installation with the 2.6.20 kernel. 
Modprobe.conf looks like this:
alias eth0 skge
alias scsi_hostadapter ata_piix
alias char-major-61 lirc_i2c
alias snd-card-0 snd-intel8x0
options snd-card-0 index=0
options snd-intel8x0 index=0
remove snd-intel8x0 { /usr/sbin/alsactl store 0 >/dev/null 2>&1 || : ; 
}; /sbin/modprobe -r --ignore-remove snd-intel8x0
# nvidia kernel module
alias char-major-195 nvidia-1_0-9755
alias nvidia nvidia-1_0-9755
# ivtv modules setup
alias char-major-81 videodev
alias char-major-81-0 ivtv
options ivtv ivtv-first-minor=2
# LIRC
install lirc_i2c /sbin/modprobe ivtv; /sbin/modprobe --ignore-install 
lirc_i2c

and rc.local looked like this:
touch /var/lock/subsys/local
# Dvb Card setup
modprobe cx88-dvb
sleep 2
chmod -R 777 /dev/dvb/adapter0
chmod -R 777 /dev/dvb/adapter1

All the /dev ports then looked perfectly normal so I started 
mythtvsetup.  All looked perfectly normal through the first three steps 
but when I went to do a channel scan on the first dvb card, I wasn't 
seeing anything on at all on the signal strength meter or the signal to 
noise meter and no channels were found.  Those meters have always in the 
past showed some amount of residual noise so something is very wrong.  I 
canceled out of Mythtvsetup and saw that the terminal window contained 
these warnings:
2007-03-21 19:38:24.579 DiSEqCDevTree, Warning: No device tree for cardid 1
2007-03-21 19:38:24.631 DiSEqCDevTree, Warning: No device tree for cardid 2
2007-03-21 19:38:44.873 DVBSignalMonitor(0)::constructor(-1,Warning, can 
not measure Signal Strength): Remote I/O error
2007-03-21 19:38:44.998 DVBSignalMonitor(0)::constructor(-1,Warning, can 
not measure S/N): Remote I/O error

Can anyone offer a clue as to what might be going on here?

Chris