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List:       kde-bugs-dist
Subject:    [kwin] [Bug 329297] Kwin very slow/frozen when OpenGL compositing enabled
From:       Chris Wilkinson <blobster_nz () yahoo ! com ! au>
Date:       2013-12-28 21:55:32
Message-ID: bug-329297-17878-PEUjV7iHLD () http ! bugs ! kde ! org/
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https://bugs.kde.org/show_bug.cgi?id=329297

--- Comment #5 from Chris Wilkinson <blobster_nz@yahoo.com.au> ---
Hi Thomas,

(In reply to comment #4)
> (In reply to comment #2)
> > That's not yet in a release, isn't it?
> No, sorry. I assumed 4.12.0 would equal 4.11.5
> *grummelbrummelstupidreleasefreezegrummelbrummel*

;-)

> @Chris
> Please try setting the tearing prevention to "none" nevertheless (that's
> gonna work ;-) and also to deactivate the blur effect.
> Please ensure to restart "kwin --replace &" after altering the tearing
> prevention mode.

I'm not sure how to say this, but after not working since I installed openSUSE
13.1 over 4 days ago, OpenGL compositing in KDE seems to be working now. Or at
least it has not caused any slow down or lock up since last night around when I
uploaded the qdbus command output - it has also survived 2 cold reboots I did
as a test this morning.

Blur is running, and tearing prevention is set to 'auto', and performance is as
good as it was under KDE 4.9.5, which with my GeForce GTX 560Ti was very
good...

> Next thing (even if that helps!) would be to check whether triple buffering
> is enabled:
> grep -i triple /var/log/Xorg.0.log

No mention of triple buffering in Xorg.0.log.

> And if not try results with:
> ---------------------------------
> export __GL_YIELD="USLEEP"
> kwin --replace &

I'll keep monitoring the performance, and if it slows again I'll look at usleep
and other options, and report back to here.

Thanks guys, although I have no idea what actually fixed it - maybe it fixed
itself somehow...

Best regards,

Chris W, NZ.

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