"mythtv-setup" giving "Session management error: Authentication Rejected"
 

As you can probably tell, I'm trying to install mythtv in Ubuntu. I've got the ivtv drivers working (following along with this guide: http://www.cs.rit.edu/~css8044/?q=mythinstall) and can watch TV when I play /dev/video0. So now onto installing mythtv itself :-)

I've used synaptec to install mythtv-common and -backend, then was giving a message that I need to run mythtv-setup next. I've done the following to setup the database:

mysql < /lib/modules/2.6.10/mythtv-0.18.1/database/mc.sql

and verified that mysql (v4.1) is up-and-running but when I run mythtv-setup (xhost + && sudo -H -u mythtv mythtv-setup) I get this message:

"Session management error: Authentication Rejected, reason : None of the authentication protocols specified are supported and host-based authentication failed
Segmentation fault"

Is this a problem with the database authentication? I have no idea what to do :-) Plleeeeeeeaase help me.

Thanks!

--Mitchua