acpi panic

[Richard Nyberg <rnyberg@xxxxxxxxxxxxx>]

Apart from the pf panic I have another panic that occurs from time to time.
Below are the backtrace and dmesg. The core dump is available if needed.

        -Richard

Panic
*****
Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0x0
fault code              = supervisor write, page not present
instruction pointer     = 0x8:0xff807d10
stack pointer           = 0x10:0xff807cfc
frame pointer           = 0x10:0xff807d1c
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gran 1
processor eflags        = resume, IOPL = 0
current process         = Idle
current thread          = pri 12 

trap number             = 12
panic: page fault

Backtrace
*********
#0  dumpsys () at thread.h:83
#1  0xc02b97bc in boot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:335
#2  0xc02b9d21 in panic (fmt=0xc051441d "%s")
    at /usr/src/sys/kern/kern_shutdown.c:684
#3  0xc04c8cd8 in trap_fatal (frame=0xff807cbc, eva=0)
    at /usr/src/sys/i386/i386/trap.c:1183
#4  0xc04c8977 in trap_pfault (frame=0xff807cbc, usermode=0, eva=0)
    at /usr/src/sys/i386/i386/trap.c:1083
#5  0xc04c8594 in trap (frame=
      {tf_fs = 24, tf_es = 16, tf_ds = 16, tf_edi = 0, tf_esi = 1, tf_ebp = -8356580, tf_isp = -8356632, tf_ebx = 0, tf_edx = 0, tf_ecx = -8356592, tf_eax = 0, tf_trapno = 12, tf_err = 2, tf_eip = -8356592, tf_cs = 8, tf_eflags = 65606, tf_esp = 16, tf_ss = -8356592}) at /usr/src/sys/i386/i386/trap.c:654
#6  0xc04b532f in calltrap () at /usr/src/sys/i386/i386/exception.s:774
#7  0xff807d10 in ?? ()
#8  0x00000010 in ?? ()
#9  0xff807d10 in ?? ()
#10 0xc18fa694 in ?? ()
#11 0x00000010 in ?? ()
#12 0x00000000 in ?? ()
#13 0x00000001 in ?? ()
#14 0x00000000 in ?? ()
#15 0xc0724b24 in AcpiGbl_BitRegisterInfo ()
---Type <return> to continue, or q <return> to quit---
#16 0xff807d40 in ?? ()
#17 0xc07026b3 in AcpiGetRegister (RegisterId=0, ReturnValue=0x0, Flags=0)
    at /usr/src/sys/dev/acpica5/../../contrib/dev/acpica-unix-20050309/hardware/hwregs.c:381
#18 0xc07026b3 in AcpiGetRegister (RegisterId=0, ReturnValue=0x0, 
    Flags=3228715812)
    at /usr/src/sys/dev/acpica5/../../contrib/dev/acpica-unix-20050309/hardware/hwregs.c:381
#19 0xc07168c9 in acpi_cpu_idle () at /usr/src/sys/dev/acpica5/acpi_cpu.c:925
#20 0xc04baa87 in cpu_idle () at /usr/src/sys/i386/i386/machdep.c:862
#21 0x00000000 in ?? ()

dmesg
*****
Copyright (c) 2003, 2004, 2005, 2006 The DragonFly Project.
Copyright (c) 1992-2003 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.
DragonFly 1.6.0-RELEASE #0: Tue Jul 25 17:23:41 CEST 2006
    root@xxxxxxxxxx:/usr/obj/usr/src/sys/GENERIC
TSC clock: 1470085453 Hz, i8254 clock: 1193251 Hz
CPU: AMD Athlon(tm) XP 1700+ (1470.01-MHz 686-class CPU)
  Origin = "AuthenticAMD"  Id = 0x662  Stepping = 2
  Features=0x383f9ff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR,SSE>
  AMD Features=0xc0480000<MP,AMIE,DSP,3DNow!>
real memory  = 536805376 (524224K bytes)
avail memory = 509386752 (497448K bytes)
Preloaded elf kernel "/kernel" at 0xc06dd000.
Pentium Pro MTRR support enabled
md0: Malloc disk
pcibios: BIOS version 2.10
Using $PIR table, 8 entries at 0xc00fdee0
npx0: <math processor> on motherboard
npx0: INT 16 interface
Using MMX optimized bcopy/copyin/copyout
legacypci0 on motherboard
pcib0: <Host to PCI bridge> on legacypci0
pci0: <PCI bus> on pcib0
agp0: <VIA Generic host to PCI bridge> mem 0xd0000000-0xd7ffffff at device 0.0 on pci0
pcib1: <PCI to PCI bridge (vendor=1106 device=b099)> at device 1.0 on pci0
pci1: <PCI bus> on pcib1
pci1: <NVidia GeForce DDR graphics accelerator> at 0.0 irq 11
fxp0: <Intel 82550 Pro/100 Ethernet> port 0xd000-0xd03f mem 0xe3000000-0xe301ffff,0xe3020000-0xe3020fff irq 10 at device 10.0 on pci0
miibus0: <MII bus> on fxp0
inphy0: <i82555 10/100 media interface> on miibus0
inphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
fxp0: MAC address: 00:02:b3:a7:68:1f
vr0: <VIA VT6102 Rhine II 10/100BaseTX> port 0xd400-0xd4ff mem 0xe3021000-0xe30210ff irq 10 at device 12.0 on pci0
miibus1: <MII bus> on vr0
ukphy0: <Generic IEEE 802.3u media interface> on miibus1
ukphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
vr0: MAC address: 00:05:5d:f5:43:f9
pci0: <unknown card> (vendor=0x1274, dev=0x1371) at 13.0 irq 11
isab0: <PCI to ISA bridge (vendor=1106 device=3074)> at device 17.0 on pci0
isa0: <ISA bus> on isab0
atapci0: <VIA 8233 ATA100 controller> port 0xdc00-0xdc0f at device 17.1 on pci0
ata0: at 0x1f0 irq 14 on atapci0
ata1: at 0x170 irq 15 on atapci0
uhci0: <VIA 83C572 USB controller> port 0xe000-0xe01f irq 11 at device 17.2 on pci0
usb0: <VIA 83C572 USB controller> on uhci0
usb0: USB revision 1.0
uhub0: VIA UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub0: 2 ports with 2 removable, self powered
uhub0: port error, restarting port 1
uhub0: port error, giving up port 1
uhci1: <VIA 83C572 USB controller> port 0xe400-0xe41f irq 11 at device 17.3 on pci0
usb1: <VIA 83C572 USB controller> on uhci1
usb1: USB revision 1.0
uhub1: VIA UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub1: 2 ports with 2 removable, self powered
uhub1: port error, restarting port 1
uhub1: port error, giving up port 1
uhci2: <VIA 83C572 USB controller> port 0xe800-0xe81f irq 11 at device 17.4 on pci0
usb2: <VIA 83C572 USB controller> on uhci2
usb2: USB revision 1.0
uhub2: VIA UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub2: 2 ports with 2 removable, self powered
uhub2: port error, restarting port 1
uhub2: port error, giving up port 1
orm0: <Option ROMs> at iomem 0xc0000-0xcffff,0xd0000-0xd7fff,0xd8000-0xd97ff,0xea800-0xf8fff on isa0
fdc0: <NEC 72065B or clone> at port 0x3f0-0x3f5,0x3f7 irq 6 drq 2 on isa0
fdc0: FIFO enabled, 8 bytes threshold
fd0: <1440-KB 3.5" drive> on fdc0 drive 0
atkbdc0: <Keyboard controller (i8042)> at port 0x60,0x64 on isa0
atkbd0: <AT Keyboard> flags 0x1 irq 1 on atkbdc0
kbd0 at atkbd0
psm0: <PS/2 Mouse> irq 12 on atkbdc0
psm0: model Generic PS/2 mouse, device ID 0
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
sc0: <System console> at flags 0x100 on isa0
sc0: VGA <16 virtual consoles, flags=0x300>
sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0
sio0: type 16550A
sio1 at port 0x2f8-0x2ff irq 3 on isa0
sio1: type 16550A
ppc0: <Parallel port> at port 0x378-0x37f irq 7 on isa0
ppc0: Generic chipset (NIBBLE-only) in COMPATIBLE mode
ppbus0: <Parallel port bus> on ppc0
plip0: <PLIP network interface> on ppbus0
lpt0: <Printer> on ppbus0
lpt0: Interrupt-driven port
ppi0: <Parallel I/O> on ppbus0
ad0: DMA limited to UDMA33, non-ATA66 cable or device
ad0: 19574MB <IBM-DPTA-372050> [39770/16/63] at ata0-master UDMA33
ad2: 190782MB <ST3200822A> [387621/16/63] at ata1-master UDMA100
acd0: CDROM <SONY CDU4811> at ata0-slave PIO4
Mounting root from ufs:/dev/ad0s1a
cd0 at ata0 bus 0 target 1 lun 0
cd0: <SONY CDU4811 PY06> Removable CD-ROM SCSI-0 device 
cd0: 16.000MB/s transfers
cd0: Attempt to query device size failed: NOT READY, Medium not present
WARNING:  was not properly dismounted