Thanks to recent commits in the RandR 1.2 branch for the
open-source X.Org Radeon driver, it's now possible to use S-Video and
composite TV output on your ATI graphics card without any patches. This
is not limited to the R200 series but will also work with the R300
series and theoretically any graphics card supported by the
xf86-video-ati driver. In this guide have outlined the instructions for
enabling TV output support from the Radeon driver git code as well as
some of the current limitations.