(In reply to comment #16)
> (In reply to comment #15)
> > I got the results with fglrx:
> > PPLL1@50Hz:     fb=23.7    ref=2    post=6
> > PPLL1@23.976Hz: fb=23.7    ref=2    post=12
> > 
> > PPLL2 does seem to be used as it does not change. PPLL1 has different values
> > than with the radeon OSS driver. What does this mean?
> 
> 
> (100Mhz * 23.7) / (2 * 6) = 197.5Mhz
> 
> (100Mhz * 23.7) / (2 * 12) = 98.75Mhz
> 
> Maybe fglrx is using different modelines with a different display clock? 
> Can you print what modes are being used with fglrx and radeon?  E.g., xrandr
> --verbose.

I attached both xrandr outputs.

I also noticed that for fgrlx the PLL values are the same for 50Hz,60Hz and
59.94Hz output.