Re: Cannot enable APIC with 2.6.2

Mikael Pettersson
2004-02-16T23:02:09Z

Tetsuji Rai writes:
> I enabled APIC in config file of kernel 2.6.2, however APIC is not enabled
> on boot. I'm sure APIC is enabled on my machine by BIOS, because I
> confirmed it with WIndows XP. What's wrong with my settings? Or it's a
> bug of kernel?.....I suspect my config should be wrong.....

"APIC" here means I/O-APIC. The local APIC is Ok according to the dmesg log.

> # CONFIG_SMP is not set
> # CONFIG_PREEMPT is not set
> CONFIG_X86_UP_APIC=y
> CONFIG_X86_UP_IOAPIC=y
> CONFIG_X86_LOCAL_APIC=y

This part is fine.

> CONFIG_MTRR=y

But here the .config ends, so we can't tell if ACPI is enabled or not.

> -----dmesg-----

The kernel found no MP tables. The only chance left to enable the
I/O-APIC is for you to configure ACPI and pray it works on your machine.

(BTW, you're overclocking your P4 by about 8%.)