Got a piece of Sapphire Radeon HD 5850 yesterday and had some test.
Ubuntu Maverick x64 in default only supports KMS and no XV, no EXA, on OpenGL, no PowerSaving
Added xorg-edgers to repository and did an update, all works!
XV: works, tear free video playback
OpenGL: works, v-synced Compiz and simple GL applications, WebGL on Chromium, some texture corruptions though
PowerSave: works, echoing "low" to /sys/class/drm/0/power/power_profile results in card drop to 175 Core, 300 Mem, 0.95v and dead silent
Temperature via LM-Sensors: works, getting GPU temp idling at 45C
I am overall very happy with the result. Open source driver with almost* everything I want on an Evergreen GPU. Good work!
Almost = OpenGL is still very minimally supported but for the timeframe I couldn't ask for more I guess.
FunkyRider:"Today is the day HD 6900 (Cayman) releases. I have cash at hand and was waiting to pop in the store and nip one, EVEN IF there is no OSS support might be for some years, just to show that I still cares about ATI. However, open it's official website and select driver for HD 6000, there not even a Linux option there. I am forced to buy the green's product again, sorry AMD. "
FunkyRider:"Got a piece of Sapphire Radeon HD 5850 yesterday "