You can use the radeonhd (for HDMI) or the radeon driver. Most users are switching to the radeon driver for basic 2D video support if the radeonhd driver seems problematic. You'll have to create a xorg.conf file to activate the HDMI features with the radeonHD drive.
I've tested OSOL b130 Live CD and it works through autodetecting my radeon GPUs and usually choosing either the radeon or radeonhd driver. Both work for me and the snv_130 consolidation has the latest public releases of those drivers. Ken Mays -- This message posted from opensolaris.org
