Re: "Latitude with broken BIOS" ?

From: Mikael Pettersson (
Date: Mon Jan 20 2003 - 10:02:39 EST

Alessandro Suardi wrote:
> > Your P4-based Latitude probably has a different BIOS than the buggy
> > P3-based ones, and it may work better. Try commenting out the
> > local_apic_kills_bios entry for "Dell Latitude" at around line 692
> > in arch/i386/kernel/dmi_scan.c and rebuild the kernel. If it
> (ahem) I had tried that in 2.5.58 already ;)
> However I rebuilt 2.5.59 with that change, and I'm not going further:
> No local APIC present or hardware disabled

Ah, your P4 needs another patch. Edit arch/i386/kernel/apic.c, function
detect_init_APIC(), at line 631, and remove the "&& cpu_has_apic" after
the "boot_cpu_data.x86 == 15" test. (Or check if your BIOS can be set up
to boot with the local APIC enabled.)

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