ACPI seems fatal error on my T41

I install FreeBSD on my new T41 2373-9FC, and all
works wonderful.
But I find some problem:

1. sleep/suspend/resume dosnot work at all;
2. closing the lid or pressing any special key(such as
volume control, fn+f3, etc)
   will make the machine hung, staying there with no
repsonse any more;
3. started with acpi disabled or safe mode or single,
system will hung just one or
   two minites;
4. if started normally with acpi enabled, and not
typeing any special keys, system
   work wonderfully, and fan seems work correctly too.
But it will not sleep.

I cannot set hw.acpi.osname to ``Windows 2001''. Any
suggestion or help would be
very appreciated. Some of my infomation goes like
these:

jasonh@bsd$ uname -a

FreeBSD bsd 5.4-RC3 FreeBSD 5.4-RC3 #0: Wed Apr 27
11:48:22 CST 2005   
 root@fbsd:/usr/obj/usr/src/sys/Thinkpad-T41  i386

jasonh@fbsd$ dmesg |grep -i acpi
 
Features=0xa7e9f9bf<FPU,VME,DE,PSE,TSC,MSR,MCE,CX8,SEP,MTRR,PGE,MCA,CMOV,PAT,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,TM,PBE>
ACPI: Overriding _OS definition with "Windows 2001"
acpi0: <IBM TP-1R> on motherboard
acpi_ec0: <Embedded Controller: GPE 0x1c, ECDT> port
0x66,0x62 on acpi0
acpi0: Power Button (fixed)
Timecounter "ACPI-fast" frequency 3579545 Hz quality
1000
acpi_timer0: <24-bit timer at 3.579545MHz> port
0x1008-0x100b on acpi0
cpu0: <ACPI CPU (3 Cx states)> on acpi0
acpi_throttle0: <ACPI CPU Throttling> on cpu0
acpi_lid0: <Control Method Lid Switch> on acpi0
acpi_button0: <Sleep Button> on acpi0
pcib0: <ACPI Host-PCI bridge> port 0xcf8-0xcff on
acpi0
pci0: <ACPI PCI bus> on pcib0
pcib1: <ACPI PCI-PCI bridge> at device 1.0 on pci0
pci1: <ACPI PCI bus> on pcib1
pcib2: <ACPI PCI-PCI bridge> at device 30.0 on pci0
pci2: <ACPI PCI bus> on pcib2
acpi_tz0: <Thermal Zone> on acpi0
atkbdc0: <Keyboard controller (i8042)> port 0x64,0x60
irq 1 on acpi0
sio0: <16550A-compatible COM port> port 0x3f8-0x3ff
irq 4 flags 0x10 on acpi0
ppc0: <Standard parallel printer port> port
0x3bc-0x3be irq 7 on acpi0
acpi_ec0: info: new max delay is 60 us
acpi_cmbat0: <Control Method Battery> on acpi0
acpi_acad0: <AC Adapter> on acpi0
acpi_cmbat0: battery initialization start
acpi_acad0: On Line
acpi_cmbat0: battery initialization failed, giving up
acpi_acad0: acline initialization start
acpi_acad0: acline initialization done, tried 1 times
acpi_ec0: info: new max delay is 70 us
acpi_ec0: info: new max delay is 80 us

jasonh@fbsd$ sysctl hw.acpi
hw.acpi.supported_sleep_state: S3 S4 S5
hw.acpi.power_button_state: S5
hw.acpi.sleep_button_state: S3
hw.acpi.lid_switch_state: NONE
hw.acpi.standby_state: S1
hw.acpi.suspend_state: S3
hw.acpi.sleep_delay: 1
hw.acpi.s4bios: 0
hw.acpi.verbose: 1
hw.acpi.reset_video: 1
hw.acpi.cpu.cx_supported: C1/1 C2/1 C3/85
hw.acpi.cpu.cx_lowest: C1
hw.acpi.cpu.cx_usage: 100.00% 0.00% 0.00%
hw.acpi.thermal.min_runtime: 0
hw.acpi.thermal.polling_rate: 10
hw.acpi.thermal.tz0.temperature: 45.0C
hw.acpi.thermal.tz0.active: -1
hw.acpi.thermal.tz0.thermal_flags: 0
hw.acpi.thermal.tz0._PSV: 88.5C
hw.acpi.thermal.tz0._HOT: -1
hw.acpi.thermal.tz0._CRT: 93.0C
hw.acpi.thermal.tz0._ACx: -1 -1 -1 -1 -1 -1 -1 -1 -1
-1
hw.acpi.battery.life: -1
hw.acpi.battery.time: -1
hw.acpi.battery.state: 7
hw.acpi.battery.units: 1
hw.acpi.battery.info_expire: 5
hw.acpi.acline: 1

jasonh@fbsd$ sysctl hw.acpi.osname
sysctl: unknown oid 'hw.acpi.osname'



		
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