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List:       kde-bugs-dist
Subject:    [kwin] [Bug 322060] Synced swapping on double buffered nvidia GPUs cause high CPU load
From:       Mahendra Tallur <bugzilla_noreply () kde ! org>
Date:       2018-02-01 16:09:52
Message-ID: bug-322060-17878-tn4U4F2uUY () http ! bugs ! kde ! org/
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https://bugs.kde.org/show_bug.cgi?id=322060

--- Comment #135 from Mahendra Tallur <mahen@free.fr> ---
Regarding the Force(Full)CompositionPipeline VERSUS setting GL_YIELD to USLEEP. 
I used to use the latter and not the former because forcing the composition
pipeline may slow down the system / induce more power consumption etc. or so I
thought.

With any of the solutions, tearing is fixed. When using USLEEP I felt there was
a performance impact on the desktop : for instance, it's obvious when moving a
window to the edge of the screen to maximize it : it's jerky when using USLEEP
with an nvidia card (but it's butter smooth with my Intel HD Graphics).

I figured out this animation is also smooth when using
Force(full)compositionpipeline. I'm not 100% sure about the other effects, but
it seems better. General desktop usage still seems slightly less smooth than
with open source drivers, but it's better than when using USLEEP.

As for forcing the FULL composition pipeline or not, I don't know what actual
difference it makes.

(sorry for adding more noise :-)

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