All:
Thank you for your help. I thought support for HT was added in
2.4.18...guess I was wrong.
With some of the Red Hat 2.4.18 kernels it did work with many P4 Xeons.
-- There is no such thing as obsolete hardware. Merely hardware that other people don't want. (The Second Rule of Hardware Acquisition) Sam Flory <sflory@xxxxxxxxxxxx>