Troubleshooting:'ID "c7" respawning too fast: disabled for 5 minutes
You have an application set to automatically run on a specific virtual terminal (in /etc/inittab). That application is terminating immediately on start, causing the terminal rate limiter to go into effect.
Check system logs to determine what your application is failing. Good places to check would be:
MythFrontend: /var/log/mythtv/ Xorg: /var/log/Xorg.0.log System messages: /var/log/messages