Danilo and others, I pushed a patched ebuild for x11-drivers/xf86-video-ati to the sabayon-distro overlay. The patch is the one mentioned in fdo bug #32981. Could you emerge it and see if it does any good? It should *hopefully* address the chicken/egg issue we've seen so far.
If this won't work, I would be forced to do some hackery in xf86-video-ati pkg_postinst() (I am thinking about detecting the absence of ati-drivers and then forcing radeon.modeset=1 into users' grub.cfg & grub.conf). -- Fabio Erculiani
