Talk:Ubuntu Breezy Installation Guide
In the Troubleshooting section it says: "Look for error messages in /var/log/Xorg.0.log and kern.log. If you receive the (EE) No devices detected error message, it is highly possible that you own a Radeon from the 7000-7500 series with the R100 chip, which the proprietary Linux drivers don't support."
What are you suppose to do if you do own a Radeon from the 7000-7500 series? This doesn't provide much help as far as troubleshooting goes.