How To Enable Intel SNA Acceleration In Ubuntu

SNA is a 2D acceleration architecture for the open source Intel Linux graphics driver that provides improved X.Org driver performance, and thus, better desktop user experience. The name stands for "Sandy Bridge New Acceleration" and contrary to its name, it not just for Sandy Bridge but for previous Intel graphics generations as well.

Here's how to enable Intel SNA in Ubuntu 12.04 or 12.10.