Comment # 5 on bug 92722 from Michel D�nzer

(In reply to Saurav from comment #4)
> The radeon driver basically seems unable to find a screen to its liking, 
> > (EE) RADEON(0): No modes.
> > (EE) Screen(s) found, but none have a usable configuration.
> and then gives up altogether:-
> > (EE) no screens found(EE)

That doesn't look related to this bug report. Please file your own report,
including the corresponding dmesg output.