[Bug 48880] Set mode has different timings than requested on VGA

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https://bugs.freedesktop.org/show_bug.cgi?id=48880

--- Comment #17 from Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxxxxx> 2012-04-19 06:59:00 PDT ---
(In reply to comment #16)
> (In reply to comment #14)
> > I'd be leery of changing the pll flags without a lot of thorough testing since
> > these change may break certain modes on other monitors.  Did you try
> > RADEON_PLL_USE_FRAC_FB_DIV?  It should help the driver get closer to the actual
> > pixel clock by allowing a finer grained fb divider, but once again, some
> > monitors are picky about certain divider combinations.  I'd be more inclined to
> > add this flag than the MINM_OVER_MAXP flag however.
> 
> I haven't tried RADEON_PLL_USE_FRAC_FB_DIV yet, but will now. What are the
> downsides of that one? I suppose there must be some since it is not enabled by
> default...

This flag also fixes it.

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