ACPI-0438: *** Error: Looking up [\\_PR_.CPU0] in namespace, AE_NOT_FOUND

I've been getting this weird error message of late on newer current builds.

It happened when I switched over to the ULE scheduler and thought it might
have been the cause, but its not as it occurs when using the 4BSD scheduler.
(It was just a coincidence that it started at the same time).

This error, I think, has to do with the fact that my computer also uses up
40% to 50% of its cpu time handling interrupts?? (I guess one cpu is
permanently tied up handling interrupts for some reason).

The system often fails shutting down too, crashing trying to stop the vru
process I think it is... Hence I come up having to fsck every time too.

I have never had a problem running FreeBSD 4 or 5-Current on this machine,
this is only relatively recent.. (at the time we were told the ULE scheduler
became the default and I decided to give it a try)

Thanks in advance,
Martin.


Dmesg output:

Copyright (c) 1992-2004 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
    The Regents of the University of California. All rights reserved.
FreeBSD 5.2-CURRENT #5: Sat Feb 14 06:06:52 CST 2004
    root_at_homer.lukaszewicz.org:/usr/src/sys/i386/compile/DIABLO
Preloaded elf kernel "/boot/kernel.old/kernel" at 0xc07c8000.
Preloaded elf module "/boot/kernel/acpi.ko" at 0xc07c8248.
ACPI APIC Table: <Award  >
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: Pentium III/Pentium III Xeon/Celeron (504.72-MHz 686-class CPU)
  Origin = "GenuineIntel"  Id = 0x673  Stepping = 3
  
Features=0x387fbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,
CMOV,PAT,PSE36,PN,MMX,FXSR,SSE>
real memory  = 134152192 (127 MB)
avail memory = 125800448 (119 MB)
FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
 cpu0 (BSP): APIC ID:  0
 cpu1 (AP): APIC ID:  1
MADT: Forcing active-lo polarity and level trigger for IRQ 9
ioapic0 <Version 1.1> irqs 0-23 on motherboard
Pentium Pro MTRR support enabled
npx0: [FAST]
npx0: <math processor> on motherboard
npx0: INT 16 interface
acpi0: <Award AWRDACPI> on motherboard
acpi0: Overriding SCI Interrupt from IRQ 9 to IRQ 20
    ACPI-0438: *** Error: Looking up [\\_PR_.CPU0] in namespace,
AE_NOT_FOUND
SearchNode 0xc0eafe20 StartNode 0xc0eafe20 ReturnNode 0
    ACPI-1287: *** Error: [NULL NAME], AE_NOT_FOUND
pcibios: BIOS version 2.10
Using $PIR table, 7 entries at 0xc00fdcf0
acpi0: Power Button (fixed)
Timecounter "ACPI-safe" frequency 3579545 Hz quality 1000
acpi_timer0: <24-bit timer at 3.579545MHz> port 0x4008-0x400b on acpi0
acpi_cpu0: <CPU> on acpi0
acpi_cpu1: <CPU> on acpi0
acpi_tz0: <Thermal Zone> on acpi0
    ACPI-0438: *** Error: Looking up [\\_PR_.CPU0] in namespace,
AE_NOT_FOUND
SearchNode 0xc0eafe20 StartNode 0xc0eafe20 ReturnNode 0
    ACPI-1287: *** Error: [NULL NAME], AE_NOT_FOUND
acpi_button0: <Power Button> on acpi0
pcib0: <ACPI Host-PCI bridge> port 0x5000-0x500f,0x4000-0x4041,0xcf8-0xcff
on acpi0
pci0: <ACPI PCI bus> on pcib0
agp0: <Intel 82443BX (440 BX) host to PCI bridge> mem 0xd0000000-0xd3ffffff
at device 0.0 on pci0
pcib1: <PCI-PCI bridge> at device 1.0 on pci0
pci1: <PCI bus> on pcib1
isab0: <PCI-ISA bridge> at device 7.0 on pci0
isa0: <ISA bus> on isab0
atapci0: <Intel PIIX4 UDMA33 controller> port 0xf000-0xf00f at device 7.1 on
pci0
ata0: at 0x1f0 irq 14 on atapci0
ata0: [MPSAFE]
ata1: at 0x170 irq 15 on atapci0
ata1: [MPSAFE]
pci0: <serial bus, USB> at device 7.2 (no driver attached)
pci0: <bridge, PCI-unknown> at device 7.3 (no driver attached)
pci0: <display, VGA> at device 8.0 (no driver attached)
rl0: <RealTek 8139 10/100BaseTX> port 0xe400-0xe4ff mem
0xd7000000-0xd70000ff irq 18 at device 10.0 on pci0
rl0: Ethernet address: 00:00:21:ee:49:b9
miibus0: <MII bus> on rl0
rlphy0: <RealTek internal media interface> on miibus0
rlphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
rl1: <Accton MPX 5030/5038 10/100BaseTX> port 0xe800-0xe8ff mem
0xd7001000-0xd70010ff irq 19 at device 11.0 on pci0
rl1: Ethernet address: 00:e0:29:79:b7:a6
miibus1: <MII bus> on rl1
rlphy1: <RealTek internal media interface> on miibus1
rlphy1:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
rl2: <RealTek 8139 10/100BaseTX> port 0xec00-0xecff mem
0xd7002000-0xd70020ff irq 19 at device 12.0 on pci0
rl2: Ethernet address: 00:00:21:f0:b5:c9
miibus2: <MII bus> on rl2
rlphy2: <RealTek internal media interface> on miibus2
rlphy2:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
fdc0: <Enhanced floppy controller (i82077, NE72065 or clone)> port
0x3f7,0x3f2-0x3f5 irq 6 drq 2 on acpi0
sio0 port 0x3f8-0x3ff irq 4 on acpi0
sio0: type 16550A
sio1 port 0x2f8-0x2ff irq 3 on acpi0
sio1: type 16550A
atkbdc0: <Keyboard controller (i8042)> port 0x64,0x60 irq 1 on acpi0
atkbd0: <AT Keyboard> flags 0x1 irq 1 on atkbdc0
kbd0 at atkbd0
orm0: <Option ROMs> at iomem 0xc8000-0xcbfff,0xc0000-0xc7fff on isa0
pmtimer0 on isa0
sc0: <System console> at flags 0x100 on isa0
sc0: VGA <16 virtual consoles, flags=0x300>
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
Timecounters tick every 10.000 msec
ipfw2 initialized, divert enabled, rule-based forwarding enabled, default to
deny, logging unlimited
IPsec: Initialized Security Association Processing.
ad0: 19569MB <WDC WD205AA-00BAA0> [39761/16/63] at ata0-master UDMA33
ad2: 76319MB <ST380021A> [155061/16/63] at ata1-master UDMA33
acd0: CDRW <SONY CD-RW CRX140E> at ata1-slave PIO4
SMP: AP CPU #1 Launched!
Mounting root from ufs:/dev/ad0s1a
WARNING: / was not properly dismounted
WARNING: /junk was not properly dismounted
/junk: mount pending error: blocks 6116 files 2
WARNING: /usr was not properly dismounted
/usr: mount pending error: blocks 8 files 0
WARNING: /var was not properly dismounted
WARNING: /storage was not properly dismounted
    ACPI-0438: *** Error: Looking up [\\_PR_.CPU0] in namespace,
AE_NOT_FOUND
SearchNode 0xc0eafe20 StartNode 0xc0eafe20 ReturnNode 0
    ACPI-1287: *** Error: [NULL NAME], AE_NOT_FOUND
    ACPI-0438: *** Error: Looking up [\\_PR_.CPU0] in namespace,
AE_NOT_FOUND
SearchNode 0xc0eafe20 StartNode 0xc0eafe20 ReturnNode 0
    ACPI-1287: *** Error: [NULL NAME], AE_NOT_FOUND