Got Myth TV and and Yousee (Copenhagen) to play together with HDHomeRun.

Multiplex info can be found in the dtv_multiplex spreadsheet (you can upload it to the mysql database).

If you would like to run Mythtv frontend in a window then from a Term run:

mythfrontend -w -geometry 960x600

This will also help debugging as the fronted write debug info to the console.

I also recommend to manually stop the back end before running mythtv-setup:

sudo service stop mythtv-backend
mythtv-setup
sudo service start mythtv-backend
mythfilldatabase 

And finally… if mythtv-backend have problems connecting to the database then grant  access to mythtv on mythconverg scheama in the database:

?> mysql --user=root -p
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 244
Server version: 5.5.32-0ubuntu0.13.04.1 (Ubuntu)

Copyright (c) 2000, 2013, Oracle and/or its affiliates. 
All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current 
input statement.
mysql> connect mysql
mysql> GRANT ALL PRIVILEGES on mythconverg to 'mythtv'@'localhost' 
IDENTIFIED BY '<mythtvs password>';
mysql> GRANT ALL PRIVILEGES on mythconverg to 'mythtv'@'%' 
IDENTIFIED BY '<mythtvs password>';
mysql> exit

A very good source for setting up MythTV is MythTV-HOWTO – 0.26: section 9