Version: (using Devel)
Installed from: Compiled sources
Kwin takes much ressource of my CPU (20%) if I active desktop effect and put in "advanced options" vsync and direct rendering on together.
Note: I have a Nvidia fx 5200
NVIDIA Driver Version: 169.12
What's your CPU?
Does the CPU usage change when disabling vsync or effects completely?
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.
*** This bug has been marked as a duplicate of 154270 ***