Re: Dual athlon XP 1800 problems

From: Dave Jones (
Date: Thu Jan 03 2002 - 13:02:28 EST

On 3 Jan 2002, H. Peter Anvin wrote:

> This seems very odd. I thought in Athlon processors the ID string
> came from the *CPU* (via CPUID), not the BIOS...

Software overridable cpuid strings are getting quick commonplace
in CPUs from several vendors.

I beleive the reasoning is that sometimes the lead time from
manufacture to marketing is long enough that the default power-on string
may not be correct, hence the BIOS can do the XP/MP descrimination, and
set accordingly. (Unless you've got a crap BIOS).

If anyone believes they have a BIOS which doesn't do this correctly,
(/proc/cpuinfo reports XP, and x86info reports MP or vice versa),
let me know, and I'll see what I can dig up.

| Dave Jones.
| SuSE Labs

- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to More majordomo info at Please read the FAQ at

This archive was generated by hypermail 2b29 : Mon Jan 07 2002 - 21:00:22 EST