Can you try test kernel from bug 314928 - it has helped with tearing during flash playback for my 4500MHD laptop.
-- [i965] Massive Screen Tearing with 9.04 https://bugs.launchpad.net/bugs/359124 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
