[mythtv-users] EIT Data, what to delete before a full tuned scan?

[cvb at kruemel.org]

Hi,

I know that EIT data for mythtv is only working after a full tuned scan, 
which is why I have created a small script to handle rescanning now and 
then. The script looks like:

# Stop MythTV
service mythtv-backend stop
# Backup database
/usr/share/mythtv/mythconverg_backup.pl
# Delete old data
. /home/mythtv/.mythtv/mysql.txt

echo '
   truncate table eit_cache;
   truncate table channel;
   truncate table channelscan;
   truncate table channelscan_channel;
   truncate table channelscan_dtv_multiplex;
   truncate table program;
  ' | mysql --database=${DBName} --user=${DBUserName} 
--password=${DBPassword}

Then I do a full tuned scan via the backend setup, and thereafter run 
another script to delete unneeded channels and put the wanted channels 
to the right places.

Now, apparently I'm missing one truncate in the script above, because, 
after the last full scan, one channel was missing which I (accidentally) 
thereafter added by scanning the existing transports. That particular 
channel (and only that one) is not showing any EIT data. So I deleted 
all channels again with the above script, did a full tuned scan again - 
but that channel does not show any EIT data in mythtv still. (It did 
before the scan, and it still does on my TV, so I'm almost certain that 
it is a configuration issue in mythtv.)

What else would I need to delete before a full tuned scan?

What would also help me would be to understand what is going wrong if I 
don't do a full tuned scan, so that I could maybe just tweak the entry 
for that particular channel manually in the database. But despite 
googling (and finding, e.g., this one: 
http://tweakingmythtv.wordpress.com/2011/01/08/mythtv-eit-data-not-working/ - did not work for me), I still have no clue what might be going wrong.

Thanks for any light you could shed on this!