Yesterday I upgraded 12.04 LTS to 12.10. Before the upgrade I used the system's video driver, but now with 12.10 I've noticed the systems lags a lot. I downloaded the Matrox drivers for the Millenium P690 versions 1.4.6 and 1.4.7 which are the latest stable drivers offered. During installation process I get an error with both drivers which are looking for the /etc/X11/xorg.conf file and noticed too that file is missing. Perhaps Canonical moved the file to another location or rearranged those configs with other files. If anyone has the same issue and has a solution would really apreciate it, thanks.