ACPI problems on MSI K7D

Dual AthlonMP 2200+ on MSI K7D Master-L (AMD 760 MPX chipset) panics
during boot when ACPI is enabled:

[...]
 cpu0(BSP): apic id:  0, version: 0x00040010, at 0xfee00000
 cpu1(AP):  apic id:  1, version: 0x00040010, at 0xfee00000
 io0(APIC): apic id:  2, version: 0x00170011, at 0xfec00000
bios32: Found BIOS32 Service Directory header at 0xc00fac90
bios32: Entry = 0xfb100 (c00fb100)  Rev = 0  Len = 1
pcibios: PCI BIOS entry at 0xf0000+0xb130
pnpbios: Found PnP BIOS data at 0xc00fbb30
pnpbios: Entry = f0000:bb60  Rev = 1.0
Other BIOS signatures found:
null: <null device, zero device>
mem: <memory & I/O>
Pentium Pro MTRR support enabled
random: <entropy source>
SMP: CPU0 bsp_apic_configure():
     lint0: 0x00010700 lint1: 0x00000400 TPR: 0x00000000 SVR: 0x000001ff
npx0: <math processor> on motherboard
npx0: INT 16 interface
acpi0: <AMD2P  AWRDACPI> on motherboard
pci_open(1):    mode 1 addr port (0x0cf8) is 0x80ff003c
pci_open(2):    mode 2 enable port (0x0cf8) is 0xff
panic: AcpiOsDerivePciId unable to initialize pci bus
cpuid = 0; lapic.id = 00000000
Debugger("panic")
Stopped at      Debugger+0x4e:  xchgl   %ebc,in_Debugger.0
db> 

This was copied by hand as I don't have a serial console hooked up to
the box.

I tested a 5.0 DP#3 installation CD I had lying around, and it seems
to handle ACPI just fine, though it hangs while or immediately after
mounting root.

I've attached a dmesg from a "normal" boot (hint.acpi.0.disabled="1")
and the disassembled DSDT.

DES
-- 
Dag-Erling Smørgrav - des_at_des.no