diff -pruN 2.6.8.1-mm4/arch/x86_64/kernel/setup.c w8.1m4/arch/x86_64/kernel/setup.c
--- 2.6.8.1-mm4/arch/x86_64/kernel/setup.c	2004-08-25 14:48:21.000000000 -0700
+++ w8.1m4/arch/x86_64/kernel/setup.c	2004-09-02 15:51:55.000000000 -0700
@@ -724,7 +724,7 @@ static void __init detect_ht(struct cpui
 		}
 		if (index_lsb != index_msb )
 			index_msb++;
-		initial_apic_id = ebx >> 24 & 0xff;
+		initial_apic_id = hard_smp_processor_id();
 		phys_proc_id[cpu] = initial_apic_id >> index_msb;
 		
 		printk(KERN_INFO  "CPU: Physical Processor ID: %d\n",