The initial-randr branch for x86-video-radeonhd has been merged into master. What this means is that you no longer need to checkout this separate branch but that all of the RandR 1.2 support is now in the mainline code for this open-source driver. The RadeonHD driver provides full RandR 1.2 support and even some initial work for RandR 1.3. The OpenSuSE mailing list announcement
goes into detail about this work and what to do if you run into any RandR problems. A new RadeonHD driver release may be out as soon as early next week.
On a separate note, if you haven't noticed X server 1.4.1 is still missing
. This updated X server release was supposed to be out nearly two weeks ago, but there are still two bugs blocking this release. More information is available in the bug report
and on the X.Org Wiki