Re: [PATCH][2.5.73] enable local APIC on P4

Davide Libenzi (davidel@xmailserver.org)
Mon, 23 Jun 2003 15:45:59 -0700 (PDT)


On Tue, 24 Jun 2003, Mikael Pettersson wrote:

> The current local APIC code refuses to enable the local APIC
> on a P4 if the BIOS booted us with the local APIC disabled.
> This patch removes this unnecessary restriction. Please apply.
>
> Most P4 machines do boot with the local APIC enabled, but
> Keith Owens reported that the P4 based Compaq Evo N800v
> disables the local APIC, even though the machine actually
> works if Linux enables it.
>
> It is possible that some P4 machines with broken BIOSen
> were saved by our refusal to enable the local APIC. We
> can handle them via the DMI blacklist rules instead.

I did the same thing on my Presario. BIOS disable it by default.

- Davide

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