Bug 163783

Summary:	Kwin takes much ressource of my CPU (20%) if I active desktop effect and put in "advanced options" vsync and direct rendering on together
Product:	[Plasma] kwin	Reporter:	Mathieu Tournier <mathieutournier>
Component:	compositing	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED DUPLICATE
Severity:	normal
Priority:	NOR
Version First Reported In:	unspecified
Target Milestone:	---
Platform:	Compiled Sources
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Mathieu Tournier 2008-06-11 13:41:46 UTC

Version:            (using Devel)
Installed from:    Compiled sources
OS:                Linux

Kwin takes much ressource of my CPU (20%) if I active desktop effect and put in "advanced options" vsync and direct rendering on together.

Comment 1 Mathieu Tournier 2008-06-11 13:50:00 UTC

Note: I have a Nvidia fx 5200
NVIDIA Driver Version: 169.12
Xorg :11.0

Comment 2 lucas 2008-06-11 13:56:19 UTC

What's your CPU?
Does the CPU usage change when disabling vsync or effects completely?

Comment 3 Mathieu Tournier 2008-06-11 15:58:40 UTC

My CPU is a Intel Pentium 4 HT 3.0GHz
My packages : Kde 4.1 beta for kubuntu
If I disable desktop effect, the CPU usage is normal.
Moreover, if I active desktop effect without "vsync" and "direct rendering" actived together, all is good.
But if I active "vsync" AND "direct rendering", kwin takes 20% of my CPU.

Comment 4 lucas 2008-06-11 16:14:16 UTC


*** This bug has been marked as a duplicate of 154270 ***