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SubjectIO-APIC says: unexpected IO-APIC was found
Hi , I use on a system composed by a MSI KT4 Ultra Motherboard (KT400 - 
vt8235 Bios 1.3) and an Athlon XP 2400+ the kernel 2.4.21-pre3-ac4
with enabled UP-APIC and UP_IO_APIC.

When I start the system the log says:

> 00000000
> CPU: AMD Athlon(tm) XP 2400+ stepping 01
> Enabling fast FPU save and restore... done.
> Enabling unmasked SIMD FPU exception support... done.
> Checking 'hlt' instruction... OK.
> POSIX conformance testing by UNIFIX
> enabled ExtINT on CPU#0
> ESR value before enabling vector: 00000080
> ESR value after enabling vector: 00000000
> ENABLING IO-APIC IRQs
> Setting 2 in the phys_id_present_map
> ...changing IO-APIC physical APIC ID to 2 ... ok.
> init IO_APIC IRQs
> IO-APIC (apicid-pin) 2-0, 2-10, 2-11, 2-17, 2-19, 2-20, 2-21, 2-22,
> 2-23 not connected.
> ..TIMER: vector=0x31 pin1=2 pin2=0
> number of MP IRQ sources: 17.
> number of IO-APIC #2 registers: 24.
> testing the IO APIC.......................
>
> IO APIC #2......
> .... register #00: 02000000
> ....... : physical APIC id: 02
> .... register #01: 00178003
> ....... : max redirection entries: 0017
> ....... : PRQ implemented: 1
> ....... : IO APIC version: 0003
> An unexpected IO-APIC was found. If this kernel release is less than
> three months old please report this to linux-smp@vger.kernel.org
> .... IRQ redirection table:
> NR Log Phy Mask Trig IRR Pol Stat Dest Deli Vect:
> 00 000 00 1 0 0 0 0 0 0 00
> 01 001 01 0 0 0 0 0 1 1 39
> 02 001 01 0 0 0 0 0 1 1 31
> 03 001 01 0 0 0 0 0 1 1 41
> 04 001 01 0 0 0 0 0 1 1 49
> 05 001 01 0 0 0 0 0 1 1 51
> 06 001 01 0 0 0 0 0 1 1 59
> 07 001 01 0 0 0 0 0 1 1 61
> 08 001 01 0 0 0 0 0 1 1 69
> 09 001 01 0 0 0 0 0 1 1 71
> 0a 000 00 1 0 0 0 0 0 0 00
> 0b 000 00 1 0 0 0 0 0 0 00
> 0c 001 01 0 0 0 0 0 1 1 79
> 0d 001 01 0 0 0 0 0 1 1 81
> 0e 001 01 0 0 0 0 0 1 1 89
> 0f 001 01 0 0 0 0 0 1 1 91
> 10 001 01 1 1 0 1 0 1 1 99
> 11 000 00 1 0 0 0 0 0 0 00
> 12 001 01 1 1 0 1 0 1 1 A1
> 13 000 00 1 0 0 0 0 0 0 00
> 14 000 00 1 0 0 0 0 0 0 00
> 15 000 00 1 0 0 0 0 0 0 00
> 16 000 00 1 0 0 0 0 0 0 00
> 17 000 00 1 0 0 0 0 0 0 00
> IRQ to pin mappings:
> IRQ0 -> 0:2
> IRQ1 -> 0:1
> IRQ3 -> 0:3
> IRQ4 -> 0:4
> IRQ5 -> 0:5
> IRQ6 -> 0:6
> IRQ7 -> 0:7
> IRQ8 -> 0:8
> IRQ9 -> 0:9
> IRQ12 -> 0:12
> IRQ13 -> 0:13
> IRQ14 -> 0:14
> IRQ15 -> 0:15
> IRQ16 -> 0:16
> IRQ18 -> 0:18
> .................................... done.
> Using local APIC timer interrupts.
> calibrating APIC timer ...

Unexpected IO-APIC was found???

I've tried to compile the kernel without IO-APIC, with only UP-APIC, but
it during the start
says:

spurious 8259A interrupt: IRQ7 ????????? What does it mean??

What is my problem with APIC??

Thanks

Bye

Marcello


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