Remember FreeSUSE and other discussions which had a SUSE fork proposed? It never truly materialised and it remains rare to find work which is derived from OpenSUSE or SLED (some GNOME/KDE menus being the exception), let alone whole distributions. Well, Linux Caixa Mágica used to be based on OpenSUSE, but it has just changed its course.
The first release candidate of Linux Caixa Mágica 12, a Portuguese Linux distribution, is now available for download and testing. The most interesting change is the fact that this release is no longer based on openSUSE, as was the case with the project's all previous releases, but on Mandriva Linux 2008.
In our little just-for-fun comparison, we the judges find that Mandriva wins by 4 categories to 2. But to the original question the answer would be to go buy the Mandriva Power Pack or try PCLOS or ALT Linux in which advanced power saving feature do work out of the box. Also, YMMV.