The recently released 177.80 version of the NVIDIA driver stopped supporting the GeForce FX series of cards. If you find your Xorg setup no longer working after upgrading, you need to install the new 173xx legacy drivers: # pacman -S nvidia-173xx Source: http://www.nvnews.net/vbulletin/showthread.php?t=120679 URL: http://archlinux.org/news/413/