Got the same problem with my Radeon HD 6620G. The -ati driver is very slow for Unity.
My temporary workaround: - Downgrade xserver-xorg-core to precise (1.11), and then - download Catalyst 12.8 from http://support.amd.com/us/gpudownload/linux/Pages/radeon_linux.aspx and create build for quantal
Got the same problem with my Radeon HD 6620G. The -ati driver is very slow for Unity.
My temporary workaround: support. amd.com/ us/gpudownload/ linux/Pages/ radeon_ linux.aspx and create build for quantal
- Downgrade xserver-xorg-core to precise (1.11), and then
- download Catalyst 12.8 from http://