Following the release of
xf86-video-ati 6.7.197 just moments ago, David Airlie has merged the
AtomBIOS support branch back to the xf86-video-ati master branch. What this means is that the Radeon X1000 (R500) and HD 2000 (R600) support (even with the
Radeon HD 2900XT) is now in the mainline Radeon driver and when using git you no longer need to switch to this separate branch and will be included in the ATI 6.7.198 driver release and later. This AtomBIOS branch merge can be viewed on the
FreeDesktop.org gitweb. If you run into problems with the latest xf86-video-ati code, report it in the
Radeon IRC channel and you can also share your experiences on the
Phoronix Forums.