https://bugs.kde.org/show_bug.cgi?id=322060

--- Comment #75 from Gunther Piez <gpiez@web.de> ---
(In reply to comment #74)
> It's been four days now and I wasn't able to reproduce this again even once
> :-/ Although I did now upgrade to KDE 4.12.0, kwin is still at 4.11.4 (and
> AFAIK, there will be no 4.12 release of kwin). Unless the update did change
> something that would result in the bug not triggering anymore.

I have seen this performance drop once - after a few hours of gaming in WoW.
ctrl+alt+f1 and back to X fixed it eventually - it may be possibly a nvidia
driver bug.
> 
> Anyway, on a related matter: since I upgraded my GPU to a GTX 780,
> performance has increased immensely.

I would expect that ^^

> So the question is: is/will kwin be able to cope with this? Linux as a
> gaming platform is becoming more important as of late.

I do not believe that generic linux distros will be of any importace for the
gaming software industry ever - but anyway, here is my "bugfix":

Disable triple buffering generally and create an executable shell script

#!/bin/bash
__GL_YIELD=USLEEP /usr/bin/kwin

in /usr/local/bin/kwin, and make sure /usr/local/bin is before /usr/bin in your
$PATH. So I get all, low cpu usage, 60 fps in desktop effects, and lag-free
gaming.

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