boot stalls at pci0

Upon attempting to upgrade my system from 7-STABLE to 8-CURRENT I
encountered a show-stopper bug.

Important system info:
-Intel DQ35JO motherboard w/ most recent BIOS
-Core2Duo E6850 cpu
-FreeBSD/AMD64
-8gb ram
-ZFS root, USB stick UFS boot

I never had problems booting the system in the past nor had I
experienced any stability issues.  Simply, I want to upgrade to
-CURRENT because I use zfs, which has recently been updated.  I csuped
two days ago and successfully built and installed world.  I built a
custom kernel, installed it and rebooted.  This is where my problem
lies.  The system hangs upon boot at the message: pci0: <ACPI PCI bus>
on pcib0.

OK, so I thought maybe this is a problem with my custom kernel, so I
tried a GENERIC kernel and received the same hang.

So next I did what I should have done before before blindly assuming
-CURRENT would boot, I downloaded the 200811 snapshot and tried to
boot it.  No dice.

The 200810 and 200809 snapshots all hang at the same place.

Interestingly enough the 200807 snapshot (there is no 200808 for
AMD64) booted just like -STABLE had previously.

I tried booting and breaking into the debugger with no success. Typing
boot -d at the loader prompt gave me an endless sea of scroll.

Since I boot off a usb stick, I can easily use VMWare Fusion to build
a new kernel for me to test.

So my question to essentially is, where did this regression come from
and what can I do to help fix this?  My best guess is that this is
ACPI related but I am obviously not a developer.  Attached below is a
dmesg from the 200807 AMD64 livecd.

Thanks,

Chris Ruiz


Copyright (c) 1992-2008 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 is a registered trademark of The FreeBSD Foundation.
FreeBSD 8.0-CURRENT-200807 #0: Tue Jul 15 00:29:21 UTC 2008
    root_at_mason.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC
WARNING: WITNESS option enabled, expect reduced performance.
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: Intel(R) Core(TM)2 Duo CPU     E6850  _at_ 3.00GHz (3001.46-MHz K8-class CPU)
  Origin = "GenuineIntel"  Id = 0x6fb  Stepping = 11
  Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
  Features2=0xe3f5<SSE3,DTES64,DS_CPL,VMX,SMX,EST,TM2,SSSE3,CX16,xTPR,PDCM>
  AMD Features=0x20100800<SYSCALL,NX,LM>
  AMD Features2=0x1<LAHF>
  Cores per package: 2
usable memory = 8486961152 (8093 MB)
avail memory  = 8206684160 (7826 MB)
ACPI APIC Table: <INTEL  DQ3510J >
FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
 cpu0 (BSP): APIC ID:  0
 cpu1 (AP): APIC ID:  1
ioapic0: Changing APIC ID to 2
ioapic0 <Version 2.0> irqs 0-23 on motherboard
kbd1 at kbdmux0
ath_hal: 0.9.20.3 (AR5210, AR5211, AR5212, RF5111, RF5112, RF2413, RF5413)
acpi0: <INTEL DQ3510J> on motherboard
acpi0: [ITHREAD]
acpi0: Power Button (fixed)
Timecounter "ACPI-fast" frequency 3579545 Hz quality 1000
acpi_timer0: <24-bit timer at 3.579545MHz> port 0x408-0x40b on acpi0
pcib0: <ACPI Host-PCI bridge> port 0xcf8-0xcff on acpi0
pci0: <ACPI PCI bus> on pcib0
vgapci0: <VGA-compatible display> port 0x3458-0x345f mem
0xe0380000-0xe03fffff,0xd0000000-0xdfffffff,0xe0200000-0xe02fffff irq
16 at device 2.0 on pci0
vgapci1: <VGA-compatible display> mem 0xe0300000-0xe037ffff at device
2.1 on pci0
pci0: <simple comms> at device 3.0 (no driver attached)
atapci0: <Intel ATA controller> port
0x3450-0x3457,0x346c-0x346f,0x3448-0x344f,0x3468-0x346b,0x3420-0x342f
irq 18 at device 3.2 on pci0
atapci0: [ITHREAD]
ata2: <ATA channel 0> on atapci0
ata2: [ITHREAD]
ata3: <ATA channel 1> on atapci0
ata3: [ITHREAD]
pci0: <simple comms, UART> at device 3.3 (no driver attached)
em0: <Intel(R) PRO/1000 Network Connection 6.9.5> port 0x3400-0x341f
mem 0xe0400000-0xe041ffff,0xe0424000-0xe0424fff irq 20 at device 25.0
on pci0
em0: Using MSI interrupt
em0: [FILTER]
em0: Ethernet address: 00:19:d1:a4:1a:cf
uhci0: <Intel 82801I (ICH9) USB controller> port 0x30e0-0x30ff irq 18
at device 26.0 on pci0
uhci0: [GIANT-LOCKED]
uhci0: [ITHREAD]
usb0: <Intel 82801I (ICH9) USB controller> on uhci0
usb0: USB revision 1.0
uhub0: <Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1> on usb0
uhub0: 2 ports with 2 removable, self powered
uhci1: <Intel 82801I (ICH9) USB controller> port 0x30c0-0x30df irq 21
at device 26.1 on pci0
uhci1: [GIANT-LOCKED]
uhci1: [ITHREAD]
usb1: <Intel 82801I (ICH9) USB controller> on uhci1
usb1: USB revision 1.0
uhub1: <Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1> on usb1
uhub1: 2 ports with 2 removable, self powered
uhci2: <Intel 82801I (ICH9) USB controller> port 0x30a0-0x30bf irq 17
at device 26.2 on pci0
uhci2: [GIANT-LOCKED]
uhci2: [ITHREAD]
usb2: <Intel 82801I (ICH9) USB controller> on uhci2
usb2: USB revision 1.0
uhub2: <Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1> on usb2
uhub2: 2 ports with 2 removable, self powered
ehci0: <Intel 82801I (ICH9) USB 2.0 controller> mem
0xe0426c00-0xe0426fff irq 17 at device 26.7 on pci0
ehci0: [GIANT-LOCKED]
ehci0: [ITHREAD]
usb3: EHCI version 1.0
usb3: companion controllers, 2 ports each: usb0 usb1 usb2
usb3: <Intel 82801I (ICH9) USB 2.0 controller> on ehci0
usb3: USB revision 2.0
uhub3: <Intel EHCI root hub, class 9/0, rev 2.00/1.00, addr 1> on usb3
uhub3: 6 ports with 6 removable, self powered
pci0: <multimedia> at device 27.0 (no driver attached)
pcib1: <ACPI PCI-PCI bridge> at device 28.0 on pci0
pci1: <ACPI PCI bus> on pcib1
pcib2: <ACPI PCI-PCI bridge> at device 28.1 on pci0
pci2: <ACPI PCI bus> on pcib2
pcib3: <ACPI PCI-PCI bridge> at device 28.2 on pci0
pci3: <ACPI PCI bus> on pcib3
atapci1: <Marvell 88SX6101 UDMA133 controller> port
0x2018-0x201f,0x2024-0x2027,0x2010-0x2017,0x2020-0x2023,0x2000-0x200f
mem 0xe0100000-0xe01001ff irq 18 at device 0.0 on pci3
atapci1: [ITHREAD]
ata4: <ATA channel 0> on atapci1
ata4: [ITHREAD]
pcib4: <ACPI PCI-PCI bridge> at device 28.3 on pci0
pci4: <ACPI PCI bus> on pcib4
pcib5: <ACPI PCI-PCI bridge> at device 28.4 on pci0
pci5: <ACPI PCI bus> on pcib5
uhci3: <Intel 82801I (ICH9) USB controller> port 0x3080-0x309f irq 23
at device 29.0 on pci0
uhci3: [GIANT-LOCKED]
uhci3: [ITHREAD]
usb4: <Intel 82801I (ICH9) USB controller> on uhci3
usb4: USB revision 1.0
uhub4: <Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1> on usb4
uhub4: 2 ports with 2 removable, self powered
uhci4: <Intel 82801I (ICH9) USB controller> port 0x3060-0x307f irq 19
at device 29.1 on pci0
uhci4: [GIANT-LOCKED]
uhci4: [ITHREAD]
usb5: <Intel 82801I (ICH9) USB controller> on uhci4
usb5: USB revision 1.0
uhub5: <Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1> on usb5
uhub5: 2 ports with 2 removable, self powered
uhci5: <Intel 82801I (ICH9) USB controller> port 0x3040-0x305f irq 18
at device 29.2 on pci0
uhci5: [GIANT-LOCKED]
uhci5: [ITHREAD]
usb6: <Intel 82801I (ICH9) USB controller> on uhci5
usb6: USB revision 1.0
uhub6: <Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1> on usb6
uhub6: 2 ports with 2 removable, self powered
ehci1: <Intel 82801I (ICH9) USB 2.0 controller> mem
0xe0426800-0xe0426bff irq 23 at device 29.7 on pci0
ehci1: [GIANT-LOCKED]
ehci1: [ITHREAD]
usb7: EHCI version 1.0
usb7: companion controllers, 2 ports each: usb4 usb5 usb6
usb7: <Intel 82801I (ICH9) USB 2.0 controller> on ehci1
usb7: USB revision 2.0
uhub7: <Intel EHCI root hub, class 9/0, rev 2.00/1.00, addr 1> on usb7
uhub7: 6 ports with 6 removable, self powered
pcib6: <ACPI PCI-PCI bridge> at device 30.0 on pci0
pci6: <ACPI PCI bus> on pcib6
fxp0: <Intel 82551 Pro/100 Ethernet> port 0x1000-0x103f mem
0xe0021000-0xe0021fff,0xe0000000-0xe001ffff irq 21 at device 0.0 on
pci6
miibus0: <MII bus> on fxp0
inphy0: <i82555 10/100 media interface> PHY 1 on miibus0
inphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
fxp0: XXX: driver didn't set ifq_maxlen
fxp0: Ethernet address: 00:07:e9:01:b9:6a
fxp0: [ITHREAD]
fwohci0: <Lucent FW322/323> mem 0xe0020000-0xe0020fff irq 19 at device
3.0 on pci6
fwohci0: [FILTER]
fwohci0: OHCI version 1.0 (ROM=0)
fwohci0: No. of Isochronous channels is 8.
fwohci0: EUI64 00:90:27:00:01:d0:dc:04
fwohci0: Phy 1394a available S400, 2 ports.
fwohci0: Link S400, max_rec 2048 bytes.
firewire0: <IEEE1394(FireWire) bus> on fwohci0
dcons_crom0: <dcons configuration ROM> on firewire0
dcons_crom0: bus_addr 0x274c000
fwe0: <Ethernet over FireWire> on firewire0
if_fwe0: Fake Ethernet address: 02:90:27:d0:dc:04
fwe0: Ethernet address: 02:90:27:d0:dc:04
fwip0: <IP over FireWire> on firewire0
fwip0: Firewire address: 00:90:27:00:01:d0:dc:04 _at_ 0xfffe00000000,
S400, maxrec 2048
sbp0: <SBP-2/SCSI over FireWire> on firewire0
fwohci0: Initiate bus reset
fwohci0: BUS reset
fwohci0: node_id=0xc800ffc0, gen=1, CYCLEMASTER mode
isab0: <PCI-ISA bridge> at device 31.0 on pci0
isa0: <ISA bus> on isab0
atapci2: <Intel AHCI controller> port
0x3438-0x343f,0x3464-0x3467,0x3430-0x3437,0x3460-0x3463,0x3020-0x303f
mem 0xe0426000-0xe04267ff irq 21 at device 31.2 on pci0
atapci2: [ITHREAD]
atapci2: AHCI Version 01.20 controller with 6 ports PM supported
ata5: <ATA channel 0> on atapci2
ata5: [ITHREAD]
ata6: <ATA channel 1> on atapci2
ata6: [ITHREAD]
ata7: <ATA channel 2> on atapci2
ata7: [ITHREAD]
ata8: <ATA channel 3> on atapci2
ata8: [ITHREAD]
ata9: <ATA channel 4> on atapci2
ata9: [ITHREAD]
ata10: <ATA channel 5> on atapci2
ata10: [ITHREAD]
pci0: <serial bus, SMBus> at device 31.3 (no driver attached)
acpi_hpet0: <High Precision Event Timer> iomem 0xfed00000-0xfed003ff on acpi0
Timecounter "HPET" frequency 14318180 Hz quality 900
cpu0: <ACPI CPU> on acpi0
est0: <Enhanced SpeedStep Frequency Control> on cpu0
p4tcc0: <CPU Frequency Thermal Control> on cpu0
cpu1: <ACPI CPU> on acpi0
est1: <Enhanced SpeedStep Frequency Control> on cpu1
p4tcc1: <CPU Frequency Thermal Control> on cpu1
acpi_button0: <Sleep Button> on acpi0
atrtc0: <AT realtime clock> port 0x70-0x71,0x74-0x77 irq 8 on acpi0
uart0: <16550 or compatible> port 0x3f8-0x3ff irq 4 flags 0x10 on acpi0
uart0: [FILTER]
orm0: <ISA Option ROM> at iomem 0xce000-0xcf7ff on isa0
atkbdc0: <Keyboard controller (i8042)> at port 0x60,0x64 on isa0
atkbd0: <AT Keyboard> irq 1 on atkbdc0
kbd0 at atkbd0
atkbd0: [GIANT-LOCKED]
atkbd0: [ITHREAD]
ppc0: cannot reserve I/O port range
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
ugen0: <American Power Conversion Back-UPS XS  900 FW:830.E6 .D USB
FW:E6, class 0/0, rev 1.10/1.06, addr 2> on uhub5
ukbd0: <Dell Dell USB Keyboard, class 0/0, rev 1.10/3.52, addr 3> on uhub5
kbd2 at ukbd0
Timecounters tick every 1.000 msec
firewire0: 1 nodes, maxhop <= 0, cable IRM = 0 (me)
firewire0: bus manager 0 (me)
md0: Preloaded image </boot/mfsroot> 4194304 bytes at 0xffffffff80d464e8
acd0: DMA limited to UDMA33, device found non-ATA66 cable
acd0: DVDROM <DVD-ROM BDV316G/VER 0C17> at ata4-master UDMA33
ad10: 476940MB <WDC WD5000AAKS-00YGA0 12.01C02> at ata5-master SATA300
ad12: 476940MB <Seagate ST3500630AS 3.AAK> at ata6-master SATA300
ad18: 715404MB <Seagate ST3750640AS 3.AAE> at ata9-master SATA300
ad20: 715404MB <Seagate ST3750640AS 3.AAE> at ata10-master SATA300
GEOM_LABEL: Label for provider acd0 is iso9660/FreeBSD_LiveFS.
GEOM_LABEL: Label for provider ad18 is label/sea750-1.
GEOM_LABEL: Label for provider ad20 is label/sea750-2.
SMP: AP CPU #1 Launched!
WARNING: WITNESS option enabled, expect reduced performance.