On my machines running the binary NVIDIA driver I have tearing when I first boot my systems. The only workaround I have found is to change the OpenGL level in the Desktop Effects Settings. What level it is set at and what level I change it to don't matter. This is the only way that the tearing stops. I have vsync enabled and set to full screen repaints. I am running the 3.10 kernel and the latest 325 NVIDIA driver. This behavior is not present on my Intel and AMD systems. It was also not present in the 4.11 beta I was running from KDE Factory. This behavior only started when I upgraded to 4.11 final.

Is anyone else experiencing this behavior? Has anyone found a better solution? Thanks.

you will find the solution in the last post here viewtopic.php?f=111&t=117147