(In reply to comment #19)
> (In reply to comment #18)
> > Actually the GPU only works if it has been initialized by fglrx and then the
> > driver is switched to radeon without rebooting. When booting with radeon it
> > doesn't work.
> 
> Can you dump the registers with avivotool
> (http://cgit.freedesktop.org/~airlied/radeontool/) from both radeon and
> fglrx?  E.g., cold boot with radeon and dump the registers:
> sudo avivotool regmatch '*' > radeon.regs
> then boot with fglrx and switch radeon:
> sudo avivotool regmatch '*' > fglrx.regs
> and post the outputs here?

Actually, three outputs would be better:
1. cold boot with radeon
2. cold boot with fglrx
3. cold boot with fglrx, warm boot radeon