[ubuntu] ATI Mobility Radeon 9000, where to get driver?

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http://ubuntuforums.org – I am trying to get 3D to work properly on a Toshiba Satellite A85-107. Here is the complete system specs: pdf. Its a ATI Mobility Radeon 9000. In the sysinfo program it tells me that it is a ATI Mobility 9200 IGP. I have tried to run celestia which does not run well, stellarium does not even try to run, but 3d screen savers run, some of them just fine others are choppy and some don't look like they fully loaded correctly. (Hardware)