ACPI Exception: AE_NO_HARDWARE_RESPONSE

[Saifi Khan <saifi.khan@xxxxxxxxxxxxxxx>]

Hi:

On Compaq C301TU laptop, the following lines get dumped on
screen everytime there is a change in the power state 
(on->off, off->on).

system power profile changed to 'economy'
ACPI Exception: AE_NO_HARDWARE_RESPONSE, Returned by Handler for [EmbeddedControl] 20090521 evregion-531
ACPI Error (psparse-0633): Method parse/execution failed [\\_SB_.PCI0.LPCB.EC0_.PCLK] (Node 0xc40694cc), AE_NO_HARDWARE_RESPONSE
ACPI Error (psparse-0633): Method parse/execution failed [\\_SB_.PCI0.LPCB.EC0_._Q1D] (Node 0xc406956c), AE_NO_HARDWARE_RESPONSE
system power profile changed to 'performance'
ACPI Exception: AE_NO_HARDWARE_RESPONSE, Returned by Handler for [EmbeddedControl] 20090521 evregion-531
ACPI Error (psparse-0633): Method parse/execution failed [\\_SB_.PCI0.LPCB.EC0_.PCLK] (Node 0xc40694cc), AE_NO_HARDWARE_RESPONSE
ACPI Error (psparse-0633): Method parse/execution failed [\\_SB_.PCI0.LPCB.EC0_._Q1D] (Node 0xc406956c), AE_NO_HARDWARE_RESPONSE
system power profile changed to 'economy'
ACPI Exception: AE_NO_HARDWARE_RESPONSE, Returned by Handler for [EmbeddedControl] 20090521 evregion-531
ACPI Error (psparse-0633): Method parse/execution failed [\\_SB_.PCI0.LPCB.EC0_.PCLK] (Node 0xc40694cc), AE_NO_HARDWARE_RESPONSE
ACPI Error (psparse-0633): Method parse/execution failed [\\_SB_.PCI0.LPCB.EC0_._Q1D] (Node 0xc406956c), AE_NO_HARDWARE_RESPONSE
system power profile changed to 'performance'


The power profile change notification is expected,
but the ACPI Error|Exception notification is surprising as i
don't see this on an identical laptop running FreeBSD-8.

The 'dmesg extract' below show information specific to ACPI.


Copyright (c) 2003-2009 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 2.4.1-RELEASE #2: Thu Oct 22 03:37:54 UTC 2009
    root@laptop.datasynergy.org:/usr/obj/usr/src/sys/DF241-P-SZ-RL-OS
TSC clock: 1596044328 Hz, i8254 clock: 1193215 Hz
CPU: Intel(R) Celeron(R) M CPU        420  @ 1.60GHz (1596.01-MHz 686-class CPU)
  Origin = "GenuineIntel"  Id = 0x6e8  Stepping = 8
  Features=0xafe9fbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,TM,PBE>
  Features2=0xc109<SSE3,MON,TM2,xTPR,PDCM>
real memory  = 2137522176 (2087424K bytes)
avail memory = 2063863808 (2015492K bytes)
kbd1 at kbdmux0
Pentium Pro MTRR support enabled
fildesc_drvinit() building stdin, stdout, stderr: 
md0: Malloc disk

ACPI: RSDP 0xf6510 00014 (v0 PTLTD )
ACPI: RSDT 0x7f68cbda 0004C (v1 HPQOEM SLIC-MPC 06040000  LTP 00000000)
ACPI: FACP 0x7f693c86 00074 (v1 HP     NISSAN   06040000 LOHR 0000005A)
ACPI: DSDT 0x7f68d506 06780 (v1 HP     NISSAN   06040000 INTL 20060608)
ACPI: FACS 0x7f694fc0 00040
ACPI: APIC 0x7f693cfa 00068 (v1 HP     NISSAN   06040000 LOHR 0000005A)
ACPI: HPET 0x7f693d62 00038 (v1 HP     NISSAN   06040000 LOHR 0000005A)
ACPI: MCFG 0x7f693d9a 0003C (v1 HP     NISSAN   06040000 LOHR 0000005A)
ACPI: BOOT 0x7f693fd8 00028 (v1 PTLTD  $SBFTBL$ 06040000  LTP 00000001)
ACPI: SLIC 0x7f693e08 00176 (v1 HPQOEM SLIC-MPC 06040000 LOHR 00000000)
ACPI: APIC 0x7f693f7e 0005A (v1 PTLTD  	 APIC   06040000  LTP 00000000)
ACPI: SSDT 0x7f68d2f8 0020A (v1 SataRe SataAhci 00001000 INTL 20060217)
ACPI: SSDT 0x7f68d11c 001DC (v1  PmRef  Cpu0Cst 00003001 INTL 20060217)
ACPI: SSDT 0x7f68cc26 004F6 (v1  PmRef    CpuPm 00003000 INTL 20060217)

npx0: <math processor> on motherboard
npx0: INT 16 interface
Using XMM optimized bcopy/copyin/copyout
acpi0: <HPQOEM SLIC-MPC> on motherboard
acpi0: Power Button (fixed)
ACPI Error: Could not enable SleepButton event 20090521 evxfevnt-298
ACPI Warning: Could not enable fixed event 3 20090521 evxface-235
acpi0: Sleep Button (fixed)
Warning: ACPI is disabling APM's device.  You can't run both
acpi_ec0: <Embedded Controller: GPE 0x19> port 0x66,0x62 on acpi0
acpi_timer0: <24-bit timer at 3.579545MHz> port 0x1008-0x100b on acpi0
cpu0: <ACPI CPU> on acpi0
cpu_cst0: <ACPI CPU C-State> on cpu0
acpi_tz0: <Thermal Zone> on acpi0
acpi_tz1: <Thermal Zone> on acpi0
acpi_lid0: <Control Method Lid Switch> on acpi0
acpi_button0: <Power Button> on acpi0
battery0: <ACPI Control Method Battery> on acpi0
atkbdc0: <Keyboard controller (i8042)> port 0x64,0x60 irq 1 on acpi0
atkbd0: <AT Keyboard> flags 0x1 irq 1 on atkbdc0
kbd0 at atkbd0

How do I fix the ... ACPI Exception: AE_NO_HARDWARE_RESPONSE ...
notification lines ?


thanks
Saifi.