ACPI errors with 5-stable, zzz

[Tod McQuillin]

With 5-stable as of last night (5.4-PRERELEASE #0: Thu Mar  3
21:41:55 JST 2005), on an IBM ThinkPad X20, running 'zzz'
produces the following messages on the console:

     ACPI-0501: *** Error: Handler for [EmbeddedControl] returned AE_NO_HARDWARE_RESPONSE
     ACPI-1304: *** Error: Method execution failed [\\_SB_.PCI0.ISA_.EC__.SYSL] (Node 0xc16d8040), AE_NO_HARDWARE_RESPONSE
     ACPI-1304: *** Error: Method execution failed [\\_SI_._SST] (Node 0xc16dd480), AE_NO_HARDWARE_RESPONSE
     ACPI-0306: *** Error: Method _SST failed, AE_NO_HARDWARE_RESPONSE

The system then appears to sleep (however, characters are still
visible on the display under bright light (though the backlight
is off) and the "sleeping" moon indicator light does not light
as it did with 4-stable).

The system wakes up and continues operating with no trouble, so
perhaps this is no cause for concern, but if anyone can explain
the messages, I'd appreciate it.

dmesg is attached.
-- 
Tod McQuillin
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Waiting (max 60 seconds) for system process `vnlru' to stop...done
Waiting (max 60 seconds) for system process `bufdaemon' to stop...done
Waiting (max 60 seconds) for system process `syncer' to stop...
Syncing disks, vnodes remaining...2 2 1 1 1 1 1 0 0 done
No buffers busy after final sync
Uptime: 11m35s
Shutting down ACPI
Rebooting...
Copyright (c) 1992-2005 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 5.4-PRERELEASE #0: Thu Mar  3 21:41:55 JST 2005
    devin at reizouko.pun-pun.prv:/usr/obj/usr/src/sys/REIZOUKO
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: Intel Pentium III (597.41-MHz 686-class CPU)
  Origin = "GenuineIntel"  Id = 0x686  Stepping = 6
  Features=0x383f9ff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR,SSE>
real memory  = 335478784 (319 MB)
avail memory = 318652416 (303 MB)
npx0: [FAST]
npx0: <math processor> on motherboard
npx0: INT 16 interface
acpi0: <PTLTD   RSDT> on motherboard
acpi0: [MPSAFE]
acpi0: Power Button (fixed)
acpi_ec0: <Embedded Controller: GPE 0x9, GLK> port 0x66,0x62 on acpi0
Timecounter "ACPI-safe" 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
agp0: <Intel 82443BX (440 BX) host to PCI bridge> mem 0xf8000000-0xfbffffff at device 0.0 on pci0
pcib1: <ACPI PCI-PCI bridge> at device 1.0 on pci0
pci1: <ACPI PCI bus> on pcib1
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: <Intel PIIX4 UDMA33 controller> port 0x1800-0x180f,0x376,0x170-0x177,0x3f6,0x1f0-0x1f7 at device 7.1 on pci0
ata0: channel #0 on atapci0
ata0: [MPSAFE]
ata1: channel #1 on atapci0
ata1: [MPSAFE]
uhci0: <Intel 82371AB/EB (PIIX4) USB controller> port 0x1820-0x183f irq 11 at device 7.2 on pci0
uhci0: [GIANT-LOCKED]
usb0: <Intel 82371AB/EB (PIIX4) USB controller> on uhci0
usb0: USB revision 1.0
uhub0: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub0: 2 ports with 2 removable, self powered
pci0: <bridge, PCI-unknown> at device 7.3 (no driver attached)
cbb0: <RF5C476 PCI-CardBus Bridge> mem 0x50000000-0x50000fff irq 11 at device 8.0 on pci0
cardbus0: <CardBus bus> on cbb0
pccard0: <16-bit PCCard bus> on cbb0
cbb0: [MPSAFE]
cbb1: <RF5C476 PCI-CardBus Bridge> mem 0x50100000-0x50100fff irq 11 at device 8.1 on pci0
cardbus1: <CardBus bus> on cbb1
pccard1: <16-bit PCCard bus> on cbb1
cbb1: [MPSAFE]
xl0: <3Com 3c556B Fast Etherlink XL> port 0x2000-0x20ff mem 0xf4011000-0xf401107f,0xf4011400-0xf401147f irq 11 at device 10.0 on pci0
miibus0: <MII bus> on xl0
acphy0: <AC101 10/100 media interface> on miibus0
acphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
xl0: Ethernet address: 00:04:76:5f:45:1f
xl0: [MPSAFE]
pci0: <simple comms> at device 10.1 (no driver attached)
pcm0: <Crystal Semiconductor CS4281> mem 0xf4000000-0xf400ffff,0xf4010000-0xf4010fff irq 11 at device 11.0 on pci0
pcm0: [GIANT-LOCKED]
pcm0: <Cirrus Logic CS4297A AC97 Codec>
acpi_tz0: <Thermal Zone> on acpi0
atkbdc0: <Keyboard controller (i8042)> port 0x64,0x60 irq 1 on acpi0
atkbd0: <AT Keyboard> irq 1 on atkbdc0
kbd0 at atkbd0
atkbd0: [GIANT-LOCKED]
psm0: <PS/2 Mouse> irq 12 on atkbdc0
psm0: [GIANT-LOCKED]
psm0: model Generic PS/2 mouse, device ID 0
fdc0: <floppy drive controller (FDE)> port 0x3f7,0x3f0-0x3f5 irq 6 drq 2 on acpi0
fdc0: [MPSAFE]
fdc0: [FAST]
fd0: <1440-KB 3.5" drive> on fdc0 drive 0
sio0: configured irq 4 not in bitmap of probed irqs 0
sio0: port may not be enabled
sio0: <16550A-compatible COM port> port 0x3f8-0x3ff irq 4 flags 0x10 on acpi0
sio0: type 8250 or not responding
ppc0: <Standard parallel printer port> port 0x3bc-0x3bf irq 7 on acpi0
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
acpi_cmbat0: <Control Method Battery> on acpi0
acpi_acad0: <AC Adapter> on acpi0
orm0: <ISA Option ROMs> at iomem 0xdc000-0xdcfff,0xd8000-0xdbfff,0xcd000-0xcd7ff on isa0
pmtimer0 on isa0
sc0: <System console> at flags 0x100 on isa0
sc0: VGA <16 virtual consoles, flags=0x300>
sio1: configured irq 3 not in bitmap of probed irqs 0
sio1: port may not be enabled
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
Timecounter "TSC" frequency 597406119 Hz quality 800
Timecounters tick every 10.000 msec
Fast IPsec: Initialized Security Association Processing.
ad0: 11509MB <IBM-DARA-212000/AR4IA52A> [24944/15/63] at ata0-master UDMA33
Mounting root from ufs:/dev/ad0s2a