[Bug 76564] [AMD Fusion E-350] HDMI refresh rates doesn't match expectations

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=76564

--- Comment #47 from Rainer Hochecker <fernetmenta at online.de> ---
(In reply to comment #41)
> (In reply to comment #40)
> > If you set "sync playback to display" in XBMC, an inaccurate clock has no
> > impact on dropped or skipped frames. Suppose you only have a 24Hz mode and
> > play material which is 23.976. It would slightly speed up playback: every
> > vblank interval a frame is rendered.
> > If you observe skipped frames, the render thread may have been blocked too
> > long or a vertical retrace was missed.
>  
> Hello FernetMenta,
> 
> Thanks for commenting, as you are one of the experts on this subject in XBMC.
> 
> "sync playback to display" is definately enabled on my system and still I am
> seeing skipped or missed frames depending on if the clock is too slow or too
> fast, respectively.
> Also, the patches from Christian already proved that a clock that is closer
> to the television display clock DOES have an influence on skipping/missing
> frames. If the clock had no impact there wouldn't be a problem in the first
> place.
> 
> The posted xrandr logs also show my television does have a 23.976 mode.

Again, a wrong speed does NOT have direct influence on dropped or skipped
frames. If you see a some kind of relationship you have to look for the missing
piece.

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