Perhaps it is better to play with a 2.6.29 kernel:
Just read over here: http://lkml.org/lkml/2009/3/25/480
that Gleixner/Molnar have finally revised the rt-patch in 2.6.29
after 1,5 years ( http://lkml.org/lkml/2009/2/11/405
) not doing anything about it. I am wondering if the Jaunty 2.6.28 rt-kernel would be the best choice.I had severe problems
with the current Ubuntu rt-kernel.
The patch is available as final rt1. http://www.kernel.org/pub/linux/kernel/projects/rt/
I'll make myself a 2.6.29-rt1