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List:       kde-bugs-dist
Subject:    [kscreenlocker] [Bug 347772] kscreenlocker_greet using 100% cpu on plasma 5
From:       Gianni <bugzilla_noreply () kde ! org>
Date:       2018-08-08 15:53:55
Message-ID: bug-347772-17878-yT0WVeoeHX () http ! bugs ! kde ! org/
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https://bugs.kde.org/show_bug.cgi?id=347772

--- Comment #27 from Gianni <gianni_2295@hotmail.it> ---
> You are using xrender compositing. This could indicate that your OpenGL
> drivers are broken. That would explain the high cpu usage.

I am indeed using xrender compositing because my graphic chip (Intel GMA950)
doesn't support opengl 2.x (only up to 1.4).
Using xrender compositing gave me good enough performance while using plasma so
far, and the bug wasn't there before 5.13 (I am unsure if the problem appeared
at a certain version of 5.13, like 5.13.1 or so on).
I take responsibility for not communicating sooner that the problem wasn't
present in previous versions of Plasma on my machine.
Since I'm not noticing abnormal performance issues other than the unreasonable
cpu spikes during screen lock, I would like to encourage taking into account
other possibilities.
I'm currently learning how to use gdb in order to provide useful debug
information as asked. I'll post the result as soon as I have had success with
it.

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