Do you mean to comment-out bind-address in my.cnf? I'll give that a try with with "bind-address = 0.0.0.0" in mythtv.cnf.Did you try commenting out the bind-address directive? Also just noticed your ipv6 address. It didn't work right with my right ipv6 address either. had to change it in mythtv-setup to ::1 Do you have a firewall set? That's all I can think of at the moment.
The ipv6 thing is a bit confusing. I'm not using ipv6 on my LAN. I think I read somewhere that mysql trys ipv6 addresses first then ipv4. Or something. That's what seems to be happening in this case. What I don't understand is why it's apparently trying to connect to localhost even though I specified the IP address of the backend server.
I don't understand your suggestion about changing the ip adddress in mythtv-setup to ::1. My current backend setup specifies a static ipv4 address of 192.168.0.101. Should I change it to ::1 if I'm not using ipv4?
One of the first things I thought of was the firewall. I had this problem when I set up MythTV on Mint 14. The firewall on the backend is currently disabled and it appears that requests are making it to mysql on the backend as evidenced by the fact that it gives the "[Warning] IP address '192.168.0.119' could not be resolved" error in the log.