Ubuntu unity 12.10 really slow

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http://askubuntu.com – Unity dash is really slow and unresponsive, it takes between 5 and 20 seconds just to load. I'm running a laptop with 2gb ram, AMD Turion(tm) 64 X2 Mobile Technology TL-64 × 2, Gallium 0.4 on ATI RS690 graphics. The original install is ubuntu studio, which i have added ubuntu desktop to. The output of /usr/lib/nux/unity_support_test -p is: OpenGL vendor string: X.Org R300 Project OpenGL renderer string: Gallium 0.4 on ATI RS690 OpenGL version string: 2.1 Mesa 9.0 Not software rendered: yes Not blacklisted: yes GLX fbconfig: yes GLX texture from pixmap: yes GL n (HowTos)