I have an IBM Thinkpad Z60m with ATI Mobility Radeon X600 128MB and with Feisty Herd 5 the "Desktop Enhancements" performance using the default drivers is very poor ... windows drag slowly, take forever to open etc.
When changing to the Ubuntu standard "Restricted Drivers" Composite is disabled and "Desktop Enhancements" thus not available. Have also tried the "official" ATI drivers from, and although 3D performance is create, failure on their side to have Composite Enabled means no "Desktop Enhancements" -- ATI radeon: poor 3D performance https://launchpad.net/bugs/56692 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs