Comment # 19
on bug 76564
from jeroen
(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.
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