I think I've seen some recent talk about this problem.  I have an HPAQ
xw6000 w/ 2xP4 CPUs.  A RH kernel finds both CPUs (4 if I enable HT).  A
kernel.org kernel only finds 1 (2 if I enable HT).  I've been playing with
this thing for awhile now, and I am at a loss.

I set DEBUG_APIC=1 and captured the attached dmesg's.  The configs are
identical as far as APIC and SMP goes.  Also, ACPI is not set, and I
am using CONFIG_M686.

Any clues?

thanks
/fc