IStormy Monday: Wher does the weather come from?

[Martin von Boehlen]

Hello,

there are some probs with an ACPI interrupt storm on 
FreeBSD 6.0/6.1-PatchedIntoOblivion ;)

I DO NOT HAVE A BIOS WHERE ACPI IS AN OPTION.
I need to disable it completely!
But 
root at www1 ~ # kldstat
Id Refs Address    Size     Name
 1    7 0xc0400000 3412e8   kernel
 2    1 0xc0742000 58554    acpi.ko
 3    1 0xc45a7000 16000    linux.ko
shows me acpi.ko 
I don't want it! I don't need it! How do I get rid of it?
Where can I get further hints ?
And, yes, I've scourged the mailing lists, the FAQ, the handbook, whatsoever!

Now, 'top' often reports 'istorm' states on 'irq9: acpi0' with the 'S' option 
and the machine is incredibly slow.

'vmstat' does NOT report any stray interrupts, but with vmstat -i it goes like 
this:

root at www1 ~ # vmstat -i
interrupt                          total       rate
irq6: fdc0                            10          0
irq9: acpi0                    283447006      23415
irq14: ata0                           41          0
irq16: ahc0                           86          0
irq17: iir0                       485463         40
irq18: dc0                       9395156        776
irq19: dc1                      21534416       1778
cpu0: timer                     24208102       1999
cpu1: timer                     24181422       1997
Total                          363251702      30008


I have compiled the kernel for SMP with APIC on. But I do NOT need ACPI! 
How do I disable it??
I've seen no kernel option.
I've seen no hints in /etc/defaults/rc.conf

Best Regards

MvB