X.Org and "Radeon HD 7600M Series"

Running "X.Org X Server 1.12.4" with radeon driver 6.14.99 (being what's included in Debian Whezy) on a new Toshiba L850/046 doesn't work, apparently due to the driver not supporting the chipset. lspci reports it as: 01:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI Thames XT/GL [Radeon HD 7600M Series] (prog-if 00 [VGA controller]) Any ideas on getting an X Server happening on this beastie? Is framebuffer driver still a usable option in cases like this (needing a workaround till a real solution is available)? Thanks, Neale.