SMP is not detected on IBM netfinity 5000, 5500 on install. you must install the smp kernel and create a new initrd to successfully have smp running.
Known problem that we are not going to be able to fix, as these machines are presenting themselves as UP machines. I have added this issue to a list for future features, so hopefully something will happen that will allow the installer to correctly probe the machine.
Did 6.2 help with this problem any?
I've just checked in a more aggressive SMP detection function. It should help in the next release.
*** Bug 11148 has been marked as a duplicate of this bug. ***
*** Bug 17237 has been marked as a duplicate of this bug. ***
latest rawhides detect properly.