https://bugs.kde.org/show_bug.cgi?id=431509

--- Comment #43 from Mojahed Yavazi <mojahed...@gmail.com> ---
(In reply to Vlad Zahorodnii from comment #38)
> (In reply to Mojahed Yavazi from comment #37)
> > Yes, Animations smooth with only this patch. But with "Prefer lower latency"
> > animations very stutter. Is this normal?
> 
> Yes, it's expected if your video card is not powerful enough, which is
> typically the case with intel gpus.
> 
> With the "prefer lower latency" latency policy, the compositor tries to
> repaint screen as close as possible to the next vblank. If the screen is not
> repainted on time, you may see some stuttering.
> 
> With the "prefer smoother animations" latency policy, the compositor will
> repaint the screen as further as possible from the next vblank, therefore
> the chances of missing the deadline are smaller than with the "prefer lower
> latency" policy.
> 
> Anyway, thank you for the confirmation. :-)

Why kwin with KWIN_USE_INTEL_SWAP_EVENT=1 and "Prefer lower latency" animations
very stutter. But kwin with KWIN_USE_INTEL_SWAP_EVENT=0 and "Prefer lower
latency" animations not stutter?

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