Freshly installed Ubuntu 12.10 on my laptop (Vaio VPCEB2S1E/W with new SSD and 8GB RAM) and I have the same issues. Dash is damn slow! Unity (desktop switching, animations, zooming in and out, etc.) has no noticeable lag though.
01:00.0 VGA compatible controller [0300]: Advanced Micro Devices [AMD] nee ATI Madison [Radeon HD 5000M Series] [1002:68c1] Subsystem: Sony Corporation Device [104d:9071] Kernel driver in use: radeon -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/814833 Title: Opening the dash is very slow and laggy To manage notifications about this bug go to: https://bugs.launchpad.net/unity/+bug/814833/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs