[kwin] [Bug 513071] Regression hardware cursor isn't staying smooth under high render usage

https://bugs.kde.org/show_bug.cgi?id=513071

--- Comment #17 from Rean <[email protected]> ---
Ok, this might actually be caused by Plasma's animations. Anytime an animation
is playing in Plasma while KWin is under load, it seems to be causing the
cursor to maybe temporarily fall back to a software cursor during the playtime
of the animation.

Here's an interesting thing thou i noticed the issue doesn't affect the
overview; the mouse stays buttery smooth going in and out of the overview while
the compositor killer is running like even if i set my mouse to 1000hz it's
still smooth.  Unlike the Kicker menu's animation and wobbly window effect and
the other animation effects like minimizing and maximizing windows, all those
effects cause the cursor to lag.

So the true cause of this might be the cursor failing to hardware accelerate
during certain effects on the desktop.

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