digi portservers on Red Hat

I am considering a 4way server to run Red Hat AS 2.1. I am using digi portservers to connect dumb terminals. The old realport driver (ver 1.6) had a bug. When you run the SMP kernel, the system would freeze up. Digi has put out a new realport driver (ver 1.7). Has anyone used this driver on an SMP server and been sucessful ? Im trying to see how stable it is in a production environment.