I have the same problem on my ibook 14'' with radeon 9550. I found that running 'glxgears -printfps' shows the FPS rate, and it's at about 25 (!!) I also know that it can work much better, because few months ago I used gentoo on this machine and had it working very well.
-- DRI very slow on ATI Radeon 9600 https://launchpad.net/bugs/69607 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs