ATIだとポイントはこの辺か？ ATI Graphic Cards ATI owners have two options for drivers. If you are unsure which driver to use, please try the open-source one first. The open-source driver will suit most needs along with being generally less problematic. Install the proprietary ATI Driver with # pacman -S catalyst Use the aticonfig tool to modify the xorg.conf. Install the open-source ATI Driver with # pacman -S xf86-video-ati Currently, the performance of the open-source driver is not on par with that of the proprietary one. It also lacks TV-out, dual-link DVI support, and possibly other features. On the other hand, it supports Aiglx and has better dual-head support. wiki.archlinux.org/index.php/Beginners_Guide#Installing_and_configuring_X
