Originally Posted by konst
My operating system, called Gentoo Linux, allows me to choose which glx module I want to use so it's a moot point whether or not the Nvidia glx module is loaded cause I choose not to use it.
In an attempt to reproduce your problem, I:
1. ran `eselect opengl set xorg-x11`
2. restarted xorg
3. logged into KDE 4.4.4 (same version as you)
4. made sure compositing was disabled
5. verified that my /var/log/Xorg.0.log looks like yours
6. ran htop
CPU usage according to htop varied between 0% and 2.5% in both cores.
gentoo ~amd64 (not funtoo)
xorg-server 126.96.36.1992 (you're running 188.8.131.521)
Athlon 64 X2 4600+ (2.4GHz, very similar to your CPU)
I still think your wacky configuration (nvidia driver without glx) is one of the roots of your problem, but it must not be the only cause.