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SubjectRe: Asus A7M266-D, Linux 2.6.7 and APIC
On Tue, 20 Jul 2004 17:55:32 -0700 (PDT), Andy Biddle wrote:
>I have a dual-proc server that I've recently decided to overhaul. It's an
>Asus A7M266-D motherboard. It had been running with dual Athlon MP 1800+s
>and RedHat and BIOS rev 1003 for at least a year with no real problems.
>
>First I decided to change the OS to Gentoo. I build the system with no
>problem and built a custom kernel based on linux 2.6.7-gentoo-r11.
>Everything was working great. Then I changed out the procs and went with
>dual Athlon MP 2800+s. To support these, I needed to (according to Asus's
>website) upgrade the BIOS to 1011.002 or higher. (Latest is 1011.003, so
>that's what I used.)
>
>Now, when I boot to this custom kernel I get about 2 seconds into the boot
>process before the system starts spewing constant "APIC error on CPU0:
>04(04)" messages. It stops booting at that point.
>
>I've done a little research and it seems that I'm supposed to do a couple
>of things:
> 1. Disable "MPS 1.4 Support" in the BIOS.
> 2. pass the kernel "noapic" as a parameter.
>
>I've done both of these and I STILL get the APIC messages. (Which leads

04 is "send accept error". That noapic doesn't kill it means
that it occurs when CPU0 sends messages to CPU1.

I suspect that CPU1 isn't booting properly, or that the BIOS
set it up with an APIC ID not matching the MP table.

How far in the boot did it get before the errors & halt?

1. Try swapping CPU0 and CPU1.
2. Try downgrading both CPUs to your original MP 1800+ ones.
3. Check if ASUS' German ftp site has a newer beta BIOS than
that 1011.003 you're using. For older boards these betas
may be the only way to get newer CPUs to work.
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