Silvio, The tearing with nouveau is because nouveau disables vsync support by default. I have no idea why. To enable it, edit /etc/X11/xorg.conf:
Section "Device" Identifier "My Graphics" Driver "nouveau" Option "GLXVBlank" "on" EndSection -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1037453 Title: compiz 1:0.9.7.8-0ubuntu1.4, performance regression To manage notifications about this bug go to: https://bugs.launchpad.net/compiz/+bug/1037453/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs