ACPI on Tyan 2507T

Is there anyone running -CURRENT on Tyan 2507T ?
I sometimes got ACPI timeout message when using ACPI to shutdown system.

Here is the dmesg:

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 #1: Sun Feb 22 07:18:50 CST 2004
    davidxu_at_tiger.xuyifeng.org:/home/davidxu/src/sys/i386/compile/gennw
Preloaded elf kernel "/boot/kernel/kernel" at 0xc0819000.
Preloaded elf module "/boot/kernel/snd_es137x.ko" at 0xc08191f4.
Preloaded elf module "/boot/kernel/snd_pcm.ko" at 0xc08192a4.
Preloaded elf module "/boot/kernel/acpi.ko" at 0xc0819350.
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: Intel Pentium III (999.67-MHz 686-class CPU)
  Origin = "GenuineIntel"  Id = 0x68a  Stepping = 10
  
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  = 805240832 (767 MB)
avail memory = 778194944 (742 MB)
ACPI APIC Table: <VIA694 AWRDACPI>
FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
 cpu0 (BSP): APIC ID:  0
 cpu1 (AP): APIC ID:  1
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: <VIA694 AWRDACPI> on motherboard
pcibios: BIOS version 2.10
Using $PIR table, 8 entries at 0xc00fdda0
acpi0: Power Button (fixed)
Timecounter "ACPI-fast" 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_button0: <Power Button> on acpi0
pcib0: <ACPI Host-PCI bridge> port 
0x6000-0x607f,0x5000-0x500f,0x4080-0x40ff,0x4000-0x407f,0xcf8-0xcff on acpi0
pci0: <ACPI PCI bus> on pcib0
pcib0: slot 7 INTD is routed to irq 11
pcib0: slot 7 INTD is routed to irq 11
agp0: <VIA 82C691 (Apollo Pro) host to PCI bridge> mem 
0xf0000000-0xf3ffffff at device 0.0 on pci0
pcib1: <PCI-PCI bridge> at device 1.0 on pci0
pci1: <PCI bus> on pcib1
pcib1: slot 0 INTA is routed to irq 16
pci1: <display, VGA> at device 0.0 (no driver attached)
isab0: <PCI-ISA bridge> at device 7.0 on pci0
isa0: <ISA bus> on isab0
atapci0: <VIA 82C686B UDMA100 controller> port 0xa000-0xa00f at device 
7.1 on pci0
ata0: at 0x1f0 irq 14 on atapci0
ata0: [MPSAFE]
ata1: at 0x170 irq 15 on atapci0
ata1: [MPSAFE]
uhci0: <VIA 83C572 USB controller> port 0xa400-0xa41f irq 11 at device 
7.2 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
uhci1: <VIA 83C572 USB controller> port 0xa800-0xa81f irq 11 at device 
7.3 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
pci0: <bridge, PCI-unknown> at device 7.4 (no driver attached)
fxp0: <Intel 82557 Pro/100 Ethernet> port 0xb800-0xb81f mem 
0xf7000000-0xf70fffff,0xf7100000-0xf7100fff irq 16 at device 11.0 on pci0
fxp0: Ethernet address 00:a0:c9:5a:41:98
miibus0: <MII bus> on fxp0
nsphy0: <DP83840 10/100 media interface> on miibus0
nsphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
pcm0: <Creative SB AudioPCI CT4730> port 0xc000-0xc01f,0xbc00-0xbc3f irq 
17 at device 12.0 on pci0
pcm0: <Creative EV1938 AC97 Codec>
fdc0: <Enhanced floppy controller (i82077, NE72065 or clone)> port 
0x3f7,0x3f0-0x3f5 irq 6 drq 2 on acpi0
fdc0: FIFO enabled, 8 bytes threshold
fd0: <1440-KB 3.5" drive> on fdc0 drive 0
sio0 port 0x3f8-0x3ff irq 4 on acpi0
sio0: type 16550A
sio1 port 0x2f8-0x2ff irq 3 on acpi0
sio1: type 16550A
ppc0 port 0x378-0x37f irq 7 on acpi0
ppc0: Generic chipset (EPP/NIBBLE) in COMPATIBLE mode
ppbus0: <Parallel port bus> on ppc0
lpt0: <Printer> on ppbus0
lpt0: Interrupt-driven port
ppi0: <Parallel I/O> on ppbus0
atkbdc0: <Keyboard controller (i8042)> port 0x64,0x60 irq 1 on acpi0
atkbd0: <AT Keyboard> flags 0x1 irq 1 on atkbdc0
kbd0 at atkbd0
psm0: <PS/2 Mouse> irq 12 on atkbdc0
psm0: model IntelliMouse, device ID 3
pmtimer0 on isa0
orm0: <Option ROM> at iomem 0xc0000-0xc8fff 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
ad0: 57241MB <ST360021A> [116301/16/63] at ata0-master UDMA100
acd0: CDROM <ATAPI-CD ROM-DRIVE-52MAX> at ata1-master UDMA33
SMP: AP CPU #1 Launched!
Mounting root from ufs:/dev/ad0s3a
drm0: <ATI Radeon QM R200 9100> port 0x9000-0x90ff mem 
0xf5000000-0xf500ffff,0xe8000000-0xefffffff irq 16 at device 0.0 on pci1
info: [drm] AGP at 0xf0000000 64MB
info: [drm] Initialized radeon 1.10.0 20020828 on minor 0
info: [drm] Loading R200 Microcode
drm0: [MPSAFE]