APIC error on CPU0: 04(04)

[Kacper Wysocki <kacperw@online.no>]

Hi all,
I've recently acquired an MSI k7d Master-L mobo and am currently running it 
with one 2400 MP CPU. Sadly, booting linux seems to be next to impossible - 
bootup works on debian boot-floppies kernels (2.4 and 2.2-based) but spews out 
the following error, in great volume, on all my kernel compiles:

APIC error on CPU0: 04(04)

The occurs immediately after boot, at which point this message floods the 
screen until I hard-reset the machine.

A couple of google searches yielded nothing too informative- I've found some 
references to the Abit BP6 board having similar problems, this being due to a 
faulty APIC implementation by the mobo manufacturer. I also found one other 
person with the same problem- he finally managed to boot by disabling APIC in 
the kernel config as below.

I've tried 2.4.19, 2.4.20 and 2.5.62 kernels, smp enabled or not.
I've tried passing noapic or disableapic to lilo at boottime/append.
I've tried going into .config (I usually do this through menuconfig) and 
undefining or setting =n to all references to APIC (ie. CONFIG_APIC_GOOD=n, 
CONFIG_IO_APIC=n, CONFIG_APIC_LOCAL=n).

All to no avail.

I have yet to try 2.0 and 2.2 kernels, but I would rather not, as I really 
need the features in 2.4

I'm very much in hope that someone here can help me... I'm an experienced 
linux user, but this is my first try at smp and I don't know what an apic is.

-kacper