I am trying to install Natty on an Acer Aspire 5810T laptop. Everything works fine once booted, but the laptop will only boot one out of three times. The other times it hangs at a black screen with an error concerning the radeon driver. It is possible however to change to a console using [Crtl]+[Alt]+[F2] but X won't start and the system hangs on an attempt to do a "sudo reboot" and needs to be killed.