Backup the database on your source machine. Newer versions of mythtv do this for you automatically. Check out the mythconverg_backup.pl script if you have to do it manually.
Delete any existing database on your destination machine:
$ mysql -u root
mysql> DROP DATABASE IF EXISTS mythconverg;
mysql> [...]
In order to get a Acan CCD Barcode Reader (Type: FG-8100) to work with Ubuntu linux, I had to blacklist the usbhid module (in /etc/modprobe.d/blacklist.conf) and instead use usbkbd.
The Ubuntu Barcode Readers page offers helpful advice.
Hear my word down to the very letter,
and you shall know our characters better.
Our first and last are two of one,
Found leading nowhere and leading none.
Also the twins sit together, a pair
following everyone and leading everywhere.
Some more of us stay grouped together as ten,
But going the wrong way,
they end where they begin.
Only one remains, and [...]