--- arch/i386/Kconfig.bak	2003-08-08 23:32:43.000000000 -0500
+++ arch/i386/Kconfig	2003-12-08 23:00:36.000000000 -0600
@@ -491,6 +491,10 @@
 	  If you have a system with several CPUs, you do not need to say Y
 	  here: the IO-APIC will be used automatically.
 
+	  A functioning local APIC is a prerequisite for using the I/O-APIC
+	  on uniprocessor machines. Sometimes working ACPI support is also
+	  required (depending on the BIOS implementation).
+
 config X86_LOCAL_APIC
 	bool
 	depends on !SMP && X86_UP_APIC