The support is not really experimental anymore, it works quite fine with most Radeon 9500 - X800 cards (not the top performance of course, but otherwise). The "experimental"-tag was recently removed from the development version, as it was basically forgotten there even though most important bugs have been fixed.
My guess would be that the fglrx still wasn't removed properly - installing fglrx breaks the open source 3D acceleration completely, but that dpkg-divert should tell you perhaps something. Try also reinstalling the package libgl1-mesa-glx. As a last resort, you could try running http://cdimage.ubuntu.com/releases/feisty/herd-4/ live cd, 3D should work out-of-the-box, though probably you are still going to hit the auto-detection problem of mobility x700, ie. that you have to specify "radeon" driver... possibly going to be fixed soon in daily images. -- AIXGL ATI Mobility Radeon X700 freezes with glxgears, glxinfo reports no rendering, radeon driver used https://launchpad.net/bugs/85557 -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
