I don't know if this help, but I suffer the same on an ATI X600m (PCIE). No AGP Card. But I can confirm that disabling KMS recovers a lot of performance.
-- [KMS][RV530] compiz very slow on Radeon AGP video cards https://bugs.launchpad.net/bugs/496653 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
