27 Mar
2014
27 Mar
'14
5:53 p.m.
https://bugs.freedesktop.org/show_bug.cgi?id=76564
--- Comment #16 from Alex Deucher agd5f@yahoo.com --- (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.
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