First of all, thanks for 4.6. I am gradually upgrading
all of my machines; the process is smoother with every release.

One of these installs is my HP EliteBook 8530w.
That's a clean install, not an upgrade.

With a stock 4.6 GENERIC.MP, the kernel pagefaults during boot
with ACPI enabled, while it boots fine with ACPI disabled.

The same happens with -stable.
These are the dmesgs of all four:


OpenBSD 4.6 (GENERIC.MP) #89: Thu Jul  9 21:32:39 MDT 2009
    dera...@i386.openbsd.org:/usr/src/sys/arch/i386/compile/GENERIC.MP
RTC BIOS diagnostic error bb<clock_battery,config_unit,memory_size,fixed_disk>
cpu0: Intel(R) Core(TM)2 Duo CPU T9400 @ 2.53GHz ("GenuineIntel" 686-class) 
2.53 GHz
cpu0: 
FPU,V86,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,SBF,SSE3,MWAIT,DS-CPL,VMX,SMX,EST,TM2,CX16,xTPR
real mem  = 2125561856 (2027MB)
avail mem = 2046459904 (1951MB)
RTC BIOS diagnostic error bb<clock_battery,config_unit,memory_size,fixed_disk>
mainbus0 at root
bios0 at mainbus0: AT/286+ BIOS, date 11/10/08, SMBIOS rev. 2.4 @ 0x7edc4000 
(21 entries)
bios0: vendor Hewlett-Packard version "68PDV Ver. F.06" date 12/15/2008
bios0: Hewlett-Packard HP EliteBook 8530w
acpi0 at bios0: rev 2
acpi0: tables DSDT FACP HPET APIC MCFG TCPA SSDT SLIC SSDT DMAR ASF! SSDT SSDT 
SSDT
acpi0: wakeup devices LANC(S5) HDEF(S4) RP02(S5) WNIC(S5) RP03(S5) ECF0(S5) 
RP05(S5) ECF0(S5) RP06(S5) NIC_(S5) USB1(S3) USB2(S3) USB3(S3) USB4(S3) 
USB5(S3) USB6(S3) U6RM(S3) EHC1(S3) EHC2(S3) PCIB(S5) HST1(S5)
acpitimer0 at acpi0: 3579545 Hz, 24 bits
acpihpet0 at acpi0: 14318179 Hz
acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat
cpu0 at mainbus0: apid 0 (boot processor)
cpu0: apic clock running at 265MHz
cpu1 at mainbus0: apid 1 (application processor)
cpu1: Intel(R) Core(TM)2 Duo CPU T9400 @ 2.53GHz ("GenuineIntel" 686-class) 
2.53 GHz
cpu1: 
FPU,V86,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,SBF,SSE3,MWAIT,DS-CPL,VMX,SMX,EST,TM2,CX16,xTPR
ioapic0 at mainbus0: apid 1 pa 0xfec00000, version 20, 24 pins
ioapic0: misconfigured as apic 0, remapped to apid 1
acpiprt0 at acpi0: bus 1 (PEGP)
acpiprt1 at acpi0: bus 2 (RP01)
acpiprt2 at acpi0: bus 3 (RP02)
acpiprt3 at acpi0: bus 4 (RP03)
acpiprt4 at acpi0: bus 69 (RP05)
acpiprt5 at acpi0: bus 134 (PCIB)
acpiprt6 at acpi0: bus 0 (PCI0)
acpiec0 at acpi0
acpicpu0 at acpi0: C3, C2, C1, PSS
acpicpu1 at acpi0: C3, C2, C1, PSS
acpipwrres0 at acpi0: APPR
acpipwrres1 at acpi0: COMP
acpipwrres2 at acpi0: LPP_
acpipwrres3 at acpi0: PGF0
acpitz0 at acpi0: critical temperature 115 degC
acpitz1 at acpi0: critical temperature 105 degC
acpitz2 at acpi0: critical temperature 112 degC
acpitz3 at acpi0: critical temperature 112 degC
acpitz4 at acpi0: critical temperature 90 degC
acpitz5 at acpi0: critical temperature 112 degC
acpibat0 at acpi0: BAT0 model "Primary" serial 00903 2009/01/13 type LIon oem 
"Hewlett-Packard"
acpibat1 at acpi0: BAT1 not present
acpiac0 at acpi0: AC unit offline
acpibtn0 at acpi0: SLPB
acpibtn1 at acpi0: LID_
acpivideo0 at acpi0: DGFX
acpivout0 at acpivideo0: LCD_
acpivout1 at acpivideo0: CRT_
acpivout2 at acpivideo0: DVI_
acpivout3 at acpivideo0: DD04
bios0: ROM list: 0xc0000/0xe200 0xce800/0x1000 0xcf800/0x1000
cpu0: Enhanced SpeedStep 2527 MHz: speeds: 2534, 2533, 1600, 800 MHz
pci0 at mainbus0 bus 0: configuration mode 1 (bios)
pchb0 at pci0 dev 0 function 0 "Intel GM45 Host" rev 0x07
ppb0 at pci0 dev 1 function 0 "Intel GM45 PCIE" rev 0x07: apic 1 int 16 (irq 10)
pci1 at ppb0 bus 1
vga1 at pci1 dev 0 function 0 vendor "NVIDIA", unknown product 0x065c rev 0xa1
wsdisplay0 at vga1 mux 1: console (80x25, vt100 emulation)
wsdisplay0: screen 1-5 added (80x25, vt100 emulation)
"Intel GM45 HECI" rev 0x07 at pci0 dev 3 function 0 not configured
pciide0 at pci0 dev 3 function 2 "Intel GM45 PT IDER" rev 0x07: DMA 
(unsupported), channel 0 wired to native-PCI, channel 1 wired to native-PCI
pciide0: using apic 1 int 18 (irq 11) for native-PCI interrupt
pciide0: channel 0 ignored (not responding; disabled or no drives?)
pciide0: channel 1 ignored (not responding; disabled or no drives?)
"Intel GM45 AMT SOL" rev 0x07 at pci0 dev 3 function 3 not configured
em0 at pci0 dev 25 function 0 "Intel ICH9 IGP M AMT" rev 0x03: apic 1 int 22 
(irq 10), address 00:23:7d:e7:ac:60
uhci0 at pci0 dev 26 function 0 "Intel 82801I USB" rev 0x03: apic 1 int 16 (irq 
10)
uhci1 at pci0 dev 26 function 1 "Intel 82801I USB" rev 0x03: apic 1 int 17 (irq 
10)
uhci2 at pci0 dev 26 function 2 "Intel 82801I USB" rev 0x03: apic 1 int 18 (irq 
11)
ehci0 at pci0 dev 26 function 7 "Intel 82801I USB" rev 0x03: apic 1 int 19 (irq 
10)
usb0 at ehci0: USB revision 2.0
uhub0 at usb0 "Intel EHCI root hub" rev 2.00/1.00 addr 1
azalia0 at pci0 dev 27 function 0 "Intel 82801I HD Audio" rev 0x03: apic 1 int 
17 (irq 10)
azalia0: RIRB time out
azalia0: codecs: Analog Devices AD1984A, AT&T/Lucent/0x1040, using Analog 
Devices AD1984A
audio0 at azalia0
ppb1 at pci0 dev 28 function 0 "Intel 82801I PCIE" rev 0x03: apic 1 int 16 (irq 
10)
pci2 at ppb1 bus 2
ppb2 at pci0 dev 28 function 1 "Intel 82801I PCIE" rev 0x03: apic 1 int 17 (irq 
10)
pci3 at ppb2 bus 3
iwn0 at pci3 dev 0 function 0 "Intel WiFi Link 5300" rev 0x00: apic 1 int 17 
(irq 10), MIMO 3T3R, MoW, address 00:21:6a:0f:b2:8e
ppb3 at pci0 dev 28 function 2 "Intel 82801I PCIE" rev 0x03: apic 1 int 18 (irq 
11)
pci4 at ppb3 bus 4
ppb4 at pci0 dev 28 function 4 "Intel 82801I PCIE" rev 0x03: apic 1 int 16 (irq 
10)
pci5 at ppb4 bus 69
uhci3 at pci0 dev 29 function 0 "Intel 82801I USB" rev 0x03: apic 1 int 20 (irq 
10)
uhci4 at pci0 dev 29 function 1 "Intel 82801I USB" rev 0x03: apic 1 int 22 (irq 
10)
uhci5 at pci0 dev 29 function 2 "Intel 82801I USB" rev 0x03: apic 1 int 18 (irq 
11)
ehci1 at pci0 dev 29 function 7 "Intel 82801I USB" rev 0x03: apic 1 int 20 (irq 
10)
usb1 at ehci1: USB revision 2.0
uhub1 at usb1 "Intel EHCI root hub" rev 2.00/1.00 addr 1
ppb5 at pci0 dev 30 function 0 "Intel 82801BAM Hub-to-PCI" rev 0x93
pci6 at ppb5 bus 134
"Ricoh 5C832 Firewire" rev 0x06 at pci6 dev 9 function 0 not configured
sdhc0 at pci6 dev 9 function 1 "Ricoh 5C822 SD/MMC" rev 0x25: apic 1 int 22 
(irq 10)
sdmmc0 at sdhc0
"Ricoh 5C843 MMC" rev 0x14 at pci6 dev 9 function 2 not configured
"Ricoh 5C592 Memory Stick" rev 0x14 at pci6 dev 9 function 3 not configured
"Ricoh 5C852 xD" rev 0x14 at pci6 dev 9 function 4 not configured
cbb0 at pci6 dev 9 function 5 "Ricoh 5C476 CardBus" rev 0xbb: apic 1 int 22 
(irq 10)
cardslot0 at cbb0 slot 0 flags 0
cardbus0 at cardslot0: bus 135 device 0 cacheline 0x0, lattimer 0x20
pcmcia0 at cardslot0
pcib0 at pci0 dev 31 function 0 "Intel 82801IEM LPC" rev 0x03
ahci0 at pci0 dev 31 function 2 "Intel 82801I AHCI" rev 0x03: apic 1 int 21 
(irq 10), AHCI 1.2
scsibus0 at ahci0: 32 targets
sd0 at scsibus0 targ 0 lun 0: <ATA, Hitachi HTS72322, FCDO> SCSI3 0/direct fixed
sd0: 238475MB, 512 bytes/sec, 488397168 sec total
cd0 at scsibus0 targ 1 lun 0: <HL-DT-ST, DVDRAM GSA-T50L, SC04> ATAPI 5/cdrom 
removable
usb2 at uhci0: USB revision 1.0
uhub2 at usb2 "Intel UHCI root hub" rev 1.00/1.00 addr 1
usb3 at uhci1: USB revision 1.0
uhub3 at usb3 "Intel UHCI root hub" rev 1.00/1.00 addr 1
usb4 at uhci2: USB revision 1.0
uhub4 at usb4 "Intel UHCI root hub" rev 1.00/1.00 addr 1
usb5 at uhci3: USB revision 1.0
uhub5 at usb5 "Intel UHCI root hub" rev 1.00/1.00 addr 1
usb6 at uhci4: USB revision 1.0
uhub6 at usb6 "Intel UHCI root hub" rev 1.00/1.00 addr 1
usb7 at uhci5: USB revision 1.0
uhub7 at usb7 "Intel UHCI root hub" rev 1.00/1.00 addr 1
isa0 at pcib0
isadma0 at isa0
pckbc0 at isa0 port 0x60/5
pckbd0 at pckbc0 (kbd slot)
pckbc0: using irq 1 for kbd slot
wskbd0 at pckbd0: console keyboard, using wsdisplay0
pms0 at pckbc0 (aux slot)
pckbc0: using irq 12 for aux slot
wsmouse0 at pms0 mux 0
pcppi0 at isa0 port 0x61
midi0 at pcppi0: <PC speaker>
spkr0 at pcppi0
lpt0 at isa0 port 0x378/4 irq 7
npx0 at isa0 port 0xf0/16: reported by CPUID; using exception 16
mtrr: Pentium Pro MTRR support
"RICOH, Bay8Controller" (manufacturer 0x0, product 0x0) at pcmcia0 function 0 
not configured
copyvalue: efff0021Store to default type!        efff0021

108c12 Called: \\_SB_.PCI0.LPCB.EC0_.RPPC
  local0:  0xd2beb444 cnt:01 stk:60 integer: 2
  local1:  0xd2be9d84 cnt:01 stk:61 integer: 0
  local2:  0xd2bf1c84 cnt:02 stk:62 objref: 0xd2beb484 index:0 opcode:CondRef
uvm_fault(0xd086fec0, 0xefffe000, 0, 1) -> d
kernel: page fault trap, code=0
Stopped at      aml_nodename+0x1b:      pushl   0(%ebx)
ddb{0}> rebooting...


OpenBSD 4.6 (GENERIC.MP) #89: Thu Jul  9 21:32:39 MDT 2009
    dera...@i386.openbsd.org:/usr/src/sys/arch/i386/compile/GENERIC.MP
RTC BIOS diagnostic error bb<clock_battery,config_unit,memory_size,fixed_disk>
cpu0: Intel(R) Core(TM)2 Duo CPU T9400 @ 2.53GHz ("GenuineIntel" 686-class) 
2.53 GHz
cpu0: 
FPU,V86,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,SBF,SSE3,MWAIT,DS-CPL,VMX,SMX,EST,TM2,CX16,xTPR
real mem  = 2125561856 (2027MB)
avail mem = 2046459904 (1951MB)
User Kernel Config
UKC> enable apm
351 apm0 already enabled
UKC> disable acpi
467 acpi0 disabled
UKC> quit
Continuing...
RTC BIOS diagnostic error bb<clock_battery,config_unit,memory_size,fixed_disk>
mainbus0 at root
bios0 at mainbus0: AT/286+ BIOS, date 11/10/08, SMBIOS rev. 2.4 @ 0x7edc4000 
(21 entries)
bios0: vendor Hewlett-Packard version "68PDV Ver. F.06" date 12/15/2008
bios0: Hewlett-Packard HP EliteBook 8530w
acpi at bios0 function 0x0 not configured
pcibios at bios0 function 0x1a not configured
bios0: ROM list: 0xc0000/0xe200 0xce800/0x1000 0xcf800/0x1000
cpu0 at mainbus0: (uniprocessor)
cpu0: unknown Enhanced SpeedStep CPU, msr 0x0617492506004925
cpu0: using only highest and lowest power states
cpu0: Enhanced SpeedStep 2528 MHz: speeds: 19467, 1600 MHz
pci0 at mainbus0 bus 0: configuration mode 1 (bios)
pchb0 at pci0 dev 0 function 0 "Intel GM45 Host" rev 0x07
ppb0 at pci0 dev 1 function 0 "Intel GM45 PCIE" rev 0x07: irq 10
pci1 at ppb0 bus 1
vga1 at pci1 dev 0 function 0 vendor "NVIDIA", unknown product 0x065c rev 0xa1
wsdisplay0 at vga1 mux 1: console (80x25, vt100 emulation)
wsdisplay0: screen 1-5 added (80x25, vt100 emulation)
"Intel GM45 HECI" rev 0x07 at pci0 dev 3 function 0 not configured
pciide0 at pci0 dev 3 function 2 "Intel GM45 PT IDER" rev 0x07: DMA 
(unsupported), channel 0 wired to native-PCI, channel 1 wired to native-PCI
pciide0: using irq 11 for native-PCI interrupt
pciide0: channel 0 ignored (not responding; disabled or no drives?)
pciide0: channel 1 ignored (not responding; disabled or no drives?)
"Intel GM45 AMT SOL" rev 0x07 at pci0 dev 3 function 3 not configured
em0 at pci0 dev 25 function 0 "Intel ICH9 IGP M AMT" rev 0x03: irq 10, address 
00:23:7d:e7:ac:60
uhci0 at pci0 dev 26 function 0 "Intel 82801I USB" rev 0x03: irq 10
uhci1 at pci0 dev 26 function 1 "Intel 82801I USB" rev 0x03: irq 10
uhci2 at pci0 dev 26 function 2 "Intel 82801I USB" rev 0x03: irq 11
ehci0 at pci0 dev 26 function 7 "Intel 82801I USB" rev 0x03: irq 10
usb0 at ehci0: USB revision 2.0
uhub0 at usb0 "Intel EHCI root hub" rev 2.00/1.00 addr 1
azalia0 at pci0 dev 27 function 0 "Intel 82801I HD Audio" rev 0x03: irq 10
azalia0: RIRB time out
azalia0: codecs: Analog Devices AD1984A, AT&T/Lucent/0x1040, using Analog 
Devices AD1984A
audio0 at azalia0
ppb1 at pci0 dev 28 function 0 "Intel 82801I PCIE" rev 0x03: irq 10
pci2 at ppb1 bus 2
ppb2 at pci0 dev 28 function 1 "Intel 82801I PCIE" rev 0x03: irq 10
pci3 at ppb2 bus 3
iwn0 at pci3 dev 0 function 0 "Intel WiFi Link 5300" rev 0x00: irq 10, MIMO 
3T3R, MoW, address 00:21:6a:0f:b2:8e
ppb3 at pci0 dev 28 function 2 "Intel 82801I PCIE" rev 0x03: irq 11
pci4 at ppb3 bus 4
ppb4 at pci0 dev 28 function 4 "Intel 82801I PCIE" rev 0x03: irq 10
pci5 at ppb4 bus 69
uhci3 at pci0 dev 29 function 0 "Intel 82801I USB" rev 0x03: irq 10
uhci4 at pci0 dev 29 function 1 "Intel 82801I USB" rev 0x03: irq 10
uhci5 at pci0 dev 29 function 2 "Intel 82801I USB" rev 0x03: irq 11
ehci1 at pci0 dev 29 function 7 "Intel 82801I USB" rev 0x03: irq 10
usb1 at ehci1: USB revision 2.0
uhub1 at usb1 "Intel EHCI root hub" rev 2.00/1.00 addr 1
ppb5 at pci0 dev 30 function 0 "Intel 82801BAM Hub-to-PCI" rev 0x93
pci6 at ppb5 bus 134
"Ricoh 5C832 Firewire" rev 0x06 at pci6 dev 9 function 0 not configured
sdhc0 at pci6 dev 9 function 1 "Ricoh 5C822 SD/MMC" rev 0x25: irq 10
sdmmc0 at sdhc0
"Ricoh 5C843 MMC" rev 0x14 at pci6 dev 9 function 2 not configured
"Ricoh 5C592 Memory Stick" rev 0x14 at pci6 dev 9 function 3 not configured
"Ricoh 5C852 xD" rev 0x14 at pci6 dev 9 function 4 not configured
cbb0 at pci6 dev 9 function 5 "Ricoh 5C476 CardBus" rev 0xbb: irq 10
cardslot0 at cbb0 slot 0 flags 0
cardbus0 at cardslot0: bus 135 device 0 cacheline 0x0, lattimer 0x20
pcmcia0 at cardslot0
pcib0 at pci0 dev 31 function 0 "Intel 82801IEM LPC" rev 0x03
ahci0 at pci0 dev 31 function 2 "Intel 82801I AHCI" rev 0x03: irq 10, AHCI 1.2
scsibus0 at ahci0: 32 targets
sd0 at scsibus0 targ 0 lun 0: <ATA, Hitachi HTS72322, FCDO> SCSI3 0/direct fixed
sd0: 238475MB, 512 bytes/sec, 488397168 sec total
cd0 at scsibus0 targ 1 lun 0: <HL-DT-ST, DVDRAM GSA-T50L, SC04> ATAPI 5/cdrom 
removable
usb2 at uhci0: USB revision 1.0
uhub2 at usb2 "Intel UHCI root hub" rev 1.00/1.00 addr 1
usb3 at uhci1: USB revision 1.0
uhub3 at usb3 "Intel UHCI root hub" rev 1.00/1.00 addr 1
usb4 at uhci2: USB revision 1.0
uhub4 at usb4 "Intel UHCI root hub" rev 1.00/1.00 addr 1
usb5 at uhci3: USB revision 1.0
uhub5 at usb5 "Intel UHCI root hub" rev 1.00/1.00 addr 1
usb6 at uhci4: USB revision 1.0
uhub6 at usb6 "Intel UHCI root hub" rev 1.00/1.00 addr 1
usb7 at uhci5: USB revision 1.0
uhub7 at usb7 "Intel UHCI root hub" rev 1.00/1.00 addr 1
isa0 at pcib0
isadma0 at isa0
pckbc0 at isa0 port 0x60/5
pckbd0 at pckbc0 (kbd slot)
pckbc0: using irq 1 for kbd slot
wskbd0 at pckbd0: console keyboard, using wsdisplay0
pms0 at pckbc0 (aux slot)
pckbc0: using irq 12 for aux slot
wsmouse0 at pms0 mux 0
pcppi0 at isa0 port 0x61
midi0 at pcppi0: <PC speaker>
spkr0 at pcppi0
lpt0 at isa0 port 0x378/4 irq 7
npx0 at isa0 port 0xf0/16: reported by CPUID; using exception 16
biomask ef7d netmask ef7d ttymask ffff
mtrr: Pentium Pro MTRR support
"RICOH, Bay8Controller" (manufacturer 0x0, product 0x0) at pcmcia0 function 0 
not configured
uvideo0 at uhub0 port 5 configuration 1 interface 0 "Chicony Electronics Co., 
Ltd. CKA7216" rev 2.00/32.18 addr 2
video0 at uvideo0
ugen0 at uhub3 port 1 "AuthenTec Fingerprint Sensor" rev 2.00/17.03 addr 2
ubt0 at uhub2 port 1 "Broadcom Corp HP Integrated Module" rev 2.00/1.00 addr 2
softraid0 at root
root on sd0a swap on sd0b dump on sd0b


OpenBSD 4.6-stable (GENERIC.MP) #0: Fri Oct 23 20:58:30 CEST 2009
    r...@hp.fjfi.cvut.cz:/usr/src/sys/arch/i386/compile/GENERIC.MP
RTC BIOS diagnostic error bb<clock_battery,config_unit,memory_size,fixed_disk>
cpu0: Intel(R) Core(TM)2 Duo CPU T9400 @ 2.53GHz ("GenuineIntel" 686-class) 
2.53 GHz
cpu0: 
FPU,V86,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,SBF,SSE3,MWAIT,DS-CPL,VMX,SMX,EST,TM2,CX16,xTPR
real mem  = 2125561856 (2027MB)
avail mem = 2046459904 (1951MB)
RTC BIOS diagnostic error bb<clock_battery,config_unit,memory_size,fixed_disk>
mainbus0 at root
bios0 at mainbus0: AT/286+ BIOS, date 11/10/08, SMBIOS rev. 2.4 @ 0x7edc4000 
(21 entries)
bios0: vendor Hewlett-Packard version "68PDV Ver. F.06" date 12/15/2008
bios0: Hewlett-Packard HP EliteBook 8530w
acpi0 at bios0: rev 2
acpi0: tables DSDT FACP HPET APIC MCFG TCPA SSDT SLIC SSDT DMAR ASF! SSDT SSDT 
SSDT
acpi0: wakeup devices LANC(S5) HDEF(S4) RP02(S5) WNIC(S5) RP03(S5) ECF0(S5) 
RP05(S5) ECF0(S5) RP06(S5) NIC_(S5) USB1(S3) USB2(S3) USB3(S3) USB4(S3) 
USB5(S3) USB6(S3) U6RM(S3) EHC1(S3) EHC2(S3) PCIB(S5) HST1(S5)
acpitimer0 at acpi0: 3579545 Hz, 24 bits
acpihpet0 at acpi0: 14318179 Hz
acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat
cpu0 at mainbus0: apid 0 (boot processor)
cpu0: apic clock running at 266MHz
cpu1 at mainbus0: apid 1 (application processor)
cpu1: Intel(R) Core(TM)2 Duo CPU T9400 @ 2.53GHz ("GenuineIntel" 686-class) 
2.53 GHz
cpu1: 
FPU,V86,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,SBF,SSE3,MWAIT,DS-CPL,VMX,SMX,EST,TM2,CX16,xTPR
ioapic0 at mainbus0: apid 1 pa 0xfec00000, version 20, 24 pins
ioapic0: misconfigured as apic 0, remapped to apid 1
acpiprt0 at acpi0: bus 1 (PEGP)
acpiprt1 at acpi0: bus 2 (RP01)
acpiprt2 at acpi0: bus 3 (RP02)
acpiprt3 at acpi0: bus 4 (RP03)
acpiprt4 at acpi0: bus 69 (RP05)
acpiprt5 at acpi0: bus 134 (PCIB)
acpiprt6 at acpi0: bus 0 (PCI0)
acpiec0 at acpi0
acpicpu0 at acpi0: C2, C1, PSS
acpicpu1 at acpi0: C2, C1, PSS
acpipwrres0 at acpi0: APPR
acpipwrres1 at acpi0: COMP
acpipwrres2 at acpi0: LPP_
acpipwrres3 at acpi0: PGF0
acpitz0 at acpi0: critical temperature 115 degC
acpitz1 at acpi0: critical temperature 105 degC
acpitz2 at acpi0: critical temperature 112 degC
acpitz3 at acpi0: critical temperature 112 degC
acpitz4 at acpi0: critical temperature 90 degC
acpitz5 at acpi0: critical temperature 112 degC
acpibat0 at acpi0: BAT0 model "Primary" serial 00903 2009/01/13 type LIon oem 
"Hewlett-Packard"
acpibat1 at acpi0: BAT1 not present
acpiac0 at acpi0: AC unit online
acpibtn0 at acpi0: SLPB
acpibtn1 at acpi0: LID_
acpivideo0 at acpi0: DGFX
acpivout0 at acpivideo0: LCD_
acpivout1 at acpivideo0: CRT_
acpivout2 at acpivideo0: DVI_
acpivout3 at acpivideo0: DD04
bios0: ROM list: 0xc0000/0xe200 0xce800/0x1000 0xcf800/0x1000
cpu0: Enhanced SpeedStep 2528 MHz: speeds: 2534, 2533, 1600, 800 MHz
pci0 at mainbus0 bus 0: configuration mode 1 (bios)
pchb0 at pci0 dev 0 function 0 "Intel GM45 Host" rev 0x07
ppb0 at pci0 dev 1 function 0 "Intel GM45 PCIE" rev 0x07: apic 1 int 16 (irq 10)
pci1 at ppb0 bus 1
vga1 at pci1 dev 0 function 0 vendor "NVIDIA", unknown product 0x065c rev 0xa1
wsdisplay0 at vga1 mux 1: console (80x25, vt100 emulation)
wsdisplay0: screen 1-5 added (80x25, vt100 emulation)
"Intel GM45 HECI" rev 0x07 at pci0 dev 3 function 0 not configured
pciide0 at pci0 dev 3 function 2 "Intel GM45 PT IDER" rev 0x07: DMA 
(unsupported), channel 0 wired to native-PCI, channel 1 wired to native-PCI
pciide0: using apic 1 int 18 (irq 11) for native-PCI interrupt
pciide0: channel 0 ignored (not responding; disabled or no drives?)
pciide0: channel 1 ignored (not responding; disabled or no drives?)
"Intel GM45 AMT SOL" rev 0x07 at pci0 dev 3 function 3 not configured
em0 at pci0 dev 25 function 0 "Intel ICH9 IGP M AMT" rev 0x03: apic 1 int 22 
(irq 10), address 00:23:7d:e7:ac:60
uhci0 at pci0 dev 26 function 0 "Intel 82801I USB" rev 0x03: apic 1 int 16 (irq 
10)
uhci1 at pci0 dev 26 function 1 "Intel 82801I USB" rev 0x03: apic 1 int 17 (irq 
10)
uhci2 at pci0 dev 26 function 2 "Intel 82801I USB" rev 0x03: apic 1 int 18 (irq 
11)
ehci0 at pci0 dev 26 function 7 "Intel 82801I USB" rev 0x03: apic 1 int 19 (irq 
10)
usb0 at ehci0: USB revision 2.0
uhub0 at usb0 "Intel EHCI root hub" rev 2.00/1.00 addr 1
azalia0 at pci0 dev 27 function 0 "Intel 82801I HD Audio" rev 0x03: apic 1 int 
17 (irq 10)
azalia0: RIRB time out
azalia0: codecs: Analog Devices AD1984A, AT&T/Lucent/0x1040, using Analog 
Devices AD1984A
audio0 at azalia0
ppb1 at pci0 dev 28 function 0 "Intel 82801I PCIE" rev 0x03: apic 1 int 16 (irq 
10)
pci2 at ppb1 bus 2
ppb2 at pci0 dev 28 function 1 "Intel 82801I PCIE" rev 0x03: apic 1 int 17 (irq 
10)
pci3 at ppb2 bus 3
iwn0 at pci3 dev 0 function 0 "Intel WiFi Link 5300" rev 0x00: apic 1 int 17 
(irq 10), MIMO 3T3R, MoW, address 00:21:6a:0f:b2:8e
ppb3 at pci0 dev 28 function 2 "Intel 82801I PCIE" rev 0x03: apic 1 int 18 (irq 
11)
pci4 at ppb3 bus 4
ppb4 at pci0 dev 28 function 4 "Intel 82801I PCIE" rev 0x03: apic 1 int 16 (irq 
10)
pci5 at ppb4 bus 69
uhci3 at pci0 dev 29 function 0 "Intel 82801I USB" rev 0x03: apic 1 int 20 (irq 
10)
uhci4 at pci0 dev 29 function 1 "Intel 82801I USB" rev 0x03: apic 1 int 22 (irq 
10)
uhci5 at pci0 dev 29 function 2 "Intel 82801I USB" rev 0x03: apic 1 int 18 (irq 
11)
ehci1 at pci0 dev 29 function 7 "Intel 82801I USB" rev 0x03: apic 1 int 20 (irq 
10)
usb1 at ehci1: USB revision 2.0
uhub1 at usb1 "Intel EHCI root hub" rev 2.00/1.00 addr 1
ppb5 at pci0 dev 30 function 0 "Intel 82801BAM Hub-to-PCI" rev 0x93
pci6 at ppb5 bus 134
"Ricoh 5C832 Firewire" rev 0x06 at pci6 dev 9 function 0 not configured
sdhc0 at pci6 dev 9 function 1 "Ricoh 5C822 SD/MMC" rev 0x25: apic 1 int 22 
(irq 10)
sdmmc0 at sdhc0
"Ricoh 5C843 MMC" rev 0x14 at pci6 dev 9 function 2 not configured
"Ricoh 5C592 Memory Stick" rev 0x14 at pci6 dev 9 function 3 not configured
"Ricoh 5C852 xD" rev 0x14 at pci6 dev 9 function 4 not configured
cbb0 at pci6 dev 9 function 5 "Ricoh 5C476 CardBus" rev 0xbb: apic 1 int 22 
(irq 10)
cardslot0 at cbb0 slot 0 flags 0
cardbus0 at cardslot0: bus 135 device 0 cacheline 0x0, lattimer 0x20
pcmcia0 at cardslot0
pcib0 at pci0 dev 31 function 0 "Intel 82801IEM LPC" rev 0x03
ahci0 at pci0 dev 31 function 2 "Intel 82801I AHCI" rev 0x03: apic 1 int 21 
(irq 10), AHCI 1.2
scsibus0 at ahci0: 32 targets
sd0 at scsibus0 targ 0 lun 0: <ATA, Hitachi HTS72322, FCDO> SCSI3 0/direct fixed
sd0: 238475MB, 512 bytes/sec, 488397168 sec total
cd0 at scsibus0 targ 1 lun 0: <HL-DT-ST, DVDRAM GSA-T50L, SC04> ATAPI 5/cdrom 
removable
usb2 at uhci0: USB revision 1.0
uhub2 at usb2 "Intel UHCI root hub" rev 1.00/1.00 addr 1
usb3 at uhci1: USB revision 1.0
uhub3 at usb3 "Intel UHCI root hub" rev 1.00/1.00 addr 1
usb4 at uhci2: USB revision 1.0
uhub4 at usb4 "Intel UHCI root hub" rev 1.00/1.00 addr 1
usb5 at uhci3: USB revision 1.0
uhub5 at usb5 "Intel UHCI root hub" rev 1.00/1.00 addr 1
usb6 at uhci4: USB revision 1.0
uhub6 at usb6 "Intel UHCI root hub" rev 1.00/1.00 addr 1
usb7 at uhci5: USB revision 1.0
uhub7 at usb7 "Intel UHCI root hub" rev 1.00/1.00 addr 1
isa0 at pcib0
isadma0 at isa0
pckbc0 at isa0 port 0x60/5
pckbd0 at pckbc0 (kbd slot)
pckbc0: using irq 1 for kbd slot
wskbd0 at pckbd0: console keyboard, using wsdisplay0
pms0 at pckbc0 (aux slot)
pckbc0: using irq 12 for aux slot
wsmouse0 at pms0 mux 0
pcppi0 at isa0 port 0x61
midi0 at pcppi0: <PC speaker>
spkr0 at pcppi0
lpt0 at isa0 port 0x378/4 irq 7
npx0 at isa0 port 0xf0/16: reported by CPUID; using exception 16
mtrr: Pentium Pro MTRR support
"RICOH, Bay8Controller" (manufacturer 0x0, product 0x0) at pcmcia0 function 0 
not configured
copyvalue: efff0021Store to default type!        efff0021

108c12 Called: \\_SB_.PCI0.LPCB.EC0_.RPPC
  local0:  0xd2be3e84 cnt:01 stk:60 integer: 2
  local1:  0xd2bf3d04 cnt:01 stk:61 integer: 0
  local2:  0xd2be9344 cnt:02 stk:62 objref: 0xd2beb344 index:0 opcode:CondRef
uvm_fault(0xd086fec0, 0xefffe000, 0, 1) -> d
kernel: page fault trap, code=0
Stopped at      aml_nodename+0x1b:      pushl   0(%ebx)
ddb{0}> rebooting...


OpenBSD 4.6-stable (GENERIC.MP) #0: Fri Oct 23 20:58:30 CEST 2009
    r...@hp.fjfi.cvut.cz:/usr/src/sys/arch/i386/compile/GENERIC.MP
RTC BIOS diagnostic error bb<clock_battery,config_unit,memory_size,fixed_disk>
cpu0: Intel(R) Core(TM)2 Duo CPU T9400 @ 2.53GHz ("GenuineIntel" 686-class) 
2.53 GHz
cpu0: 
FPU,V86,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,SBF,SSE3,MWAIT,DS-CPL,VMX,SMX,EST,TM2,CX16,xTPR
real mem  = 2125561856 (2027MB)
avail mem = 2046459904 (1951MB)
User Kernel Config
UKC> disable acpi
467 acpi0 disabled
UKC> quit
Continuing...
RTC BIOS diagnostic error bb<clock_battery,config_unit,memory_size,fixed_disk>
mainbus0 at root
bios0 at mainbus0: AT/286+ BIOS, date 11/10/08, SMBIOS rev. 2.4 @ 0x7edc4000 
(21 entries)
bios0: vendor Hewlett-Packard version "68PDV Ver. F.06" date 12/15/2008
bios0: Hewlett-Packard HP EliteBook 8530w
acpi at bios0 function 0x0 not configured
pcibios at bios0 function 0x1a not configured
bios0: ROM list: 0xc0000/0xe200 0xce800/0x1000 0xcf800/0x1000
cpu0 at mainbus0: (uniprocessor)
cpu0: unknown Enhanced SpeedStep CPU, msr 0x0617492506004925
cpu0: using only highest and lowest power states
cpu0: Enhanced SpeedStep 2528 MHz: speeds: 19467, 1600 MHz
pci0 at mainbus0 bus 0: configuration mode 1 (bios)
pchb0 at pci0 dev 0 function 0 "Intel GM45 Host" rev 0x07
ppb0 at pci0 dev 1 function 0 "Intel GM45 PCIE" rev 0x07: irq 10
pci1 at ppb0 bus 1
vga1 at pci1 dev 0 function 0 vendor "NVIDIA", unknown product 0x065c rev 0xa1
wsdisplay0 at vga1 mux 1: console (80x25, vt100 emulation)
wsdisplay0: screen 1-5 added (80x25, vt100 emulation)
"Intel GM45 HECI" rev 0x07 at pci0 dev 3 function 0 not configured
pciide0 at pci0 dev 3 function 2 "Intel GM45 PT IDER" rev 0x07: DMA 
(unsupported), channel 0 wired to native-PCI, channel 1 wired to native-PCI
pciide0: using irq 11 for native-PCI interrupt
pciide0: channel 0 ignored (not responding; disabled or no drives?)
pciide0: channel 1 ignored (not responding; disabled or no drives?)
"Intel GM45 AMT SOL" rev 0x07 at pci0 dev 3 function 3 not configured
em0 at pci0 dev 25 function 0 "Intel ICH9 IGP M AMT" rev 0x03: irq 10, address 
00:23:7d:e7:ac:60
uhci0 at pci0 dev 26 function 0 "Intel 82801I USB" rev 0x03: irq 10
uhci1 at pci0 dev 26 function 1 "Intel 82801I USB" rev 0x03: irq 10
uhci2 at pci0 dev 26 function 2 "Intel 82801I USB" rev 0x03: irq 11
ehci0 at pci0 dev 26 function 7 "Intel 82801I USB" rev 0x03: irq 10
usb0 at ehci0: USB revision 2.0
uhub0 at usb0 "Intel EHCI root hub" rev 2.00/1.00 addr 1
azalia0 at pci0 dev 27 function 0 "Intel 82801I HD Audio" rev 0x03: irq 10
azalia0: RIRB time out
azalia0: codecs: Analog Devices AD1984A, AT&T/Lucent/0x1040, using Analog 
Devices AD1984A
audio0 at azalia0
ppb1 at pci0 dev 28 function 0 "Intel 82801I PCIE" rev 0x03: irq 10
pci2 at ppb1 bus 2
ppb2 at pci0 dev 28 function 1 "Intel 82801I PCIE" rev 0x03: irq 10
pci3 at ppb2 bus 3
iwn0 at pci3 dev 0 function 0 "Intel WiFi Link 5300" rev 0x00: irq 10, MIMO 
3T3R, MoW, address 00:21:6a:0f:b2:8e
ppb3 at pci0 dev 28 function 2 "Intel 82801I PCIE" rev 0x03: irq 11
pci4 at ppb3 bus 4
ppb4 at pci0 dev 28 function 4 "Intel 82801I PCIE" rev 0x03: irq 10
pci5 at ppb4 bus 69
uhci3 at pci0 dev 29 function 0 "Intel 82801I USB" rev 0x03: irq 10
uhci4 at pci0 dev 29 function 1 "Intel 82801I USB" rev 0x03: irq 10
uhci5 at pci0 dev 29 function 2 "Intel 82801I USB" rev 0x03: irq 11
ehci1 at pci0 dev 29 function 7 "Intel 82801I USB" rev 0x03: irq 10
usb1 at ehci1: USB revision 2.0
uhub1 at usb1 "Intel EHCI root hub" rev 2.00/1.00 addr 1
ppb5 at pci0 dev 30 function 0 "Intel 82801BAM Hub-to-PCI" rev 0x93
pci6 at ppb5 bus 134
"Ricoh 5C832 Firewire" rev 0x06 at pci6 dev 9 function 0 not configured
sdhc0 at pci6 dev 9 function 1 "Ricoh 5C822 SD/MMC" rev 0x25: irq 10
sdmmc0 at sdhc0
"Ricoh 5C843 MMC" rev 0x14 at pci6 dev 9 function 2 not configured
"Ricoh 5C592 Memory Stick" rev 0x14 at pci6 dev 9 function 3 not configured
"Ricoh 5C852 xD" rev 0x14 at pci6 dev 9 function 4 not configured
cbb0 at pci6 dev 9 function 5 "Ricoh 5C476 CardBus" rev 0xbb: irq 10
cardslot0 at cbb0 slot 0 flags 0
cardbus0 at cardslot0: bus 135 device 0 cacheline 0x0, lattimer 0x20
pcmcia0 at cardslot0
pcib0 at pci0 dev 31 function 0 "Intel 82801IEM LPC" rev 0x03
ahci0 at pci0 dev 31 function 2 "Intel 82801I AHCI" rev 0x03: irq 10, AHCI 1.2
scsibus0 at ahci0: 32 targets
sd0 at scsibus0 targ 0 lun 0: <ATA, Hitachi HTS72322, FCDO> SCSI3 0/direct fixed
sd0: 238475MB, 512 bytes/sec, 488397168 sec total
cd0 at scsibus0 targ 1 lun 0: <HL-DT-ST, DVDRAM GSA-T50L, SC04> ATAPI 5/cdrom 
removable
usb2 at uhci0: USB revision 1.0
uhub2 at usb2 "Intel UHCI root hub" rev 1.00/1.00 addr 1
usb3 at uhci1: USB revision 1.0
uhub3 at usb3 "Intel UHCI root hub" rev 1.00/1.00 addr 1
usb4 at uhci2: USB revision 1.0
uhub4 at usb4 "Intel UHCI root hub" rev 1.00/1.00 addr 1
usb5 at uhci3: USB revision 1.0
uhub5 at usb5 "Intel UHCI root hub" rev 1.00/1.00 addr 1
usb6 at uhci4: USB revision 1.0
uhub6 at usb6 "Intel UHCI root hub" rev 1.00/1.00 addr 1
usb7 at uhci5: USB revision 1.0
uhub7 at usb7 "Intel UHCI root hub" rev 1.00/1.00 addr 1
isa0 at pcib0
isadma0 at isa0
pckbc0 at isa0 port 0x60/5
pckbd0 at pckbc0 (kbd slot)
pckbc0: using irq 1 for kbd slot
wskbd0 at pckbd0: console keyboard, using wsdisplay0
pms0 at pckbc0 (aux slot)
pckbc0: using irq 12 for aux slot
wsmouse0 at pms0 mux 0
pcppi0 at isa0 port 0x61
midi0 at pcppi0: <PC speaker>
spkr0 at pcppi0
lpt0 at isa0 port 0x378/4 irq 7
npx0 at isa0 port 0xf0/16: reported by CPUID; using exception 16
biomask ef7d netmask ef7d ttymask ffff
mtrr: Pentium Pro MTRR support
"RICOH, Bay8Controller" (manufacturer 0x0, product 0x0) at pcmcia0 function 0 
not configured
uvideo0 at uhub0 port 5 configuration 1 interface 0 "Chicony Electronics Co., 
Ltd. CKA7216" rev 2.00/32.18 addr 2
video0 at uvideo0
ugen0 at uhub3 port 1 "AuthenTec Fingerprint Sensor" rev 2.00/17.03 addr 2
softraid0 at root
root on sd0a swap on sd0b dump on sd0b


As this involves ACPI, I have made an acpidump available at
http://stare.cz/~hans/.tmp/hp8530w.tar.gz
Is there something more I should test/report?


Also, note that while both the release kernel and the -stable kernel
experience the same behaviour with respect to ACPI boots, there seems
to be minor differences; this is a diff of the release kernel's dmesg
and the -stable kernel's dmesg:


--- dmesg/hp.install    Fri Oct 23 21:23:47 2009
+++ dmesg/hp.stable     Fri Oct 23 21:18:59 2009
@@ -1,2 +1,2 @@
-OpenBSD 4.6 (GENERIC.MP) #89: Thu Jul  9 21:32:39 MDT 2009
-    dera...@i386.openbsd.org:/usr/src/sys/arch/i386/compile/GENERIC.MP
+OpenBSD 4.6-stable (GENERIC.MP) #0: Fri Oct 23 20:58:30 CEST 2009
+    r...@hp.fjfi.cvut.cz:/usr/src/sys/arch/i386/compile/GENERIC.MP
@@ -20 +20 @@
-cpu0: apic clock running at 265MHz
+cpu0: apic clock running at 266MHz
@@ -34,2 +34,2 @@
-acpicpu0 at acpi0: C3, C2, C1, PSS
-acpicpu1 at acpi0: C3, C2, C1, PSS
+acpicpu0 at acpi0: C2, C1, PSS
+acpicpu1 at acpi0: C2, C1, PSS
@@ -48 +48 @@
-acpiac0 at acpi0: AC unit offline
+acpiac0 at acpi0: AC unit online
@@ -57 +57 @@
-cpu0: Enhanced SpeedStep 2527 MHz: speeds: 2534, 2533, 1600, 800 MHz
+cpu0: Enhanced SpeedStep 2528 MHz: speeds: 2534, 2533, 1600, 800 MHz
@@ -146,3 +146,3 @@
-  local0:  0xd2beb444 cnt:01 stk:60 integer: 2
-  local1:  0xd2be9d84 cnt:01 stk:61 integer: 0
-  local2:  0xd2bf1c84 cnt:02 stk:62 objref: 0xd2beb484 index:0 opcode:CondRef
+  local0:  0xd2be3e84 cnt:01 stk:60 integer: 2
+  local1:  0xd2bf3d04 cnt:01 stk:61 integer: 0
+  local2:  0xd2be9344 cnt:02 stk:62 objref: 0xd2beb344 index:0 opcode:CondRef
@@ -154,2 +154,2 @@
-OpenBSD 4.6 (GENERIC.MP) #89: Thu Jul  9 21:32:39 MDT 2009
-    dera...@i386.openbsd.org:/usr/src/sys/arch/i386/compile/GENERIC.MP
+OpenBSD 4.6-stable (GENERIC.MP) #0: Fri Oct 23 20:58:30 CEST 2009
+    r...@hp.fjfi.cvut.cz:/usr/src/sys/arch/i386/compile/GENERIC.MP
@@ -162,2 +161,0 @@
-UKC> enable apm
-351 apm0 already enabled
@@ -269 +266,0 @@
-ubt0 at uhub2 port 1 "Broadcom Corp HP Integrated Module" rev 2.00/1.00 addr 2

(The ubt0i is a wifi anthena that I manually
switched off in one case and not the other.)

What causes the difference in the supported ACPI states?
The (panicing) release kernel with ACPI recognizes C3, C2, C1, PSS.
The (panicing) -stable kernel with ACPI recognizes C2, C1, PSS.
To rule out the possibility that the reason is I was running
on AC/battery respectively, I tried both combinations, but
that's not it.

Apart from the above, 4.6 runs just fine.

        Thanks for your time

                Jan

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