Next complain is about graphic driver... yes, I know that this is not a problem from Canonical, but from ATI. I bought an Ati 5850 two weeks ago, and this cards is supposed to be a very powerful card. I'm sad to say that my old NVIDIA 6800gt can manage compiz with no problems, but my new card with catalyst 9.10.... has horrific tearing, horrific lagging minimizing and maximizing windows, slow responsiveness moving windows... and the open driver can't set the correct resolution or activate my second display...