I am struggling to get usable realtime performance <512 latency on my Ubuntu Studio "low latency" kernels 3.8... The 3.5 kernel in contrast works fine. I put a bugreport in with Ubuntu, but it seems like no-one else is reporting the same problem. Makes me wonder if I am doing something wrong. Is there anything additional I should be trying, or is this a known problem that is being worked on by the kernel devs?

James