Panic on suspend

Hi,
I got a fully reproduceable panic while trying to suspend (to S3) on my laptop.
FreeBSD is -CURRENT from Monday.

I'm using a modified DSDT which used to work before I updated on Monday.
dmesg from after reboot is attacched.

Here comes gbd output


Fatal trap 12: page fault while in vm86 mode
fault virtual address	= 0x2000
fault code				= user write, page not present
instruction pointer		= 0xc000:0x5195
stack pointer			= 0x0:0xfe4
frame pointer			= 0x0:0x0
code segment			= base 0x600005, limit 0x2, type 0x11
						= DPL 1, pres 0, def32 0, gran 0
processor eflag			= interrupt enabled, resume, mv86, IOPL = 0
current process 		= 1046 (acpiconf)
[thread pid 1046 tid 100084]
Stopped at 0x5159: *** error reading from address 5159 ***

db> tr
Tracing pid 1046 tid 100084 td 0xc27645c0 
(null)(ff000e2c3,f000ff53,f000ff54,f00092da) at 0x5195
_end(ccce4fab,b638f354,3a6c5da3,ec956de5,fe6dff6c) at 0xf000ff53

db> where
Tracing pid 1046 tid 100084 td 0xc27645c0 
kdb_enter(c08d00f2,c08e69ce,c08cbfd1,c08ee7f9,2b8) at kdb_enter+0x31
witness_checkorder(c2cc2a54,9,c08ee7f9,2b8,0) at witness_checkorder+0xc9
_mtx_lock_flags(c2cc2a54,0,c08ee7f9,2b8,0) at _mtx_lock_flags+0x85
trap_pfault(c0c21fa8,0,2000,c0c21fa8,2000) at trap_pfault+0xa1
trap (0,0,0,1000,0) at trap+0x34b
calltrap() at calltrap+0x5
---trap 0xc, eip = 0x5195, esp = 0xc0c21fe8, ebp = 0 ---

db> next
panic: blockable sleep lock (sleep mutex) process lock _at_
/usr/src/sys/i386/i386/trap.c:696
KDB: enter: panic
After 2 instructions (0 loads, 0 stores),
[thread 1046 tid 1000084]
stopped at kdb_enter+0x31: ret

Thanks for your help
Filippo

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 6.0-CURRENT #0: Tue Mar  1 00:29:12 CET 2005
    root_at_portatile.fastwebnet.it:/usr/obj/usr/src/sys/PORTATILE
WARNING: WITNESS option enabled, expect reduced performance.
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: Intel(R) Pentium(R) 4 CPU 2.80GHz (2790.72-MHz 686-class CPU)
  Origin = "GenuineIntel"  Id = 0xf27  Stepping = 7
  Features=0xbfebf9ff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
real memory  = 1073152000 (1023 MB)
avail memory = 1041317888 (993 MB)
ath_hal: 0.9.14.9 (AR5210, AR5211, AR5212, RF5111, RF5112, RF2413)
ACPI: overriding DSDT/SSDT with custom table
    ACPI-0377: *** Info: Table [DSDT] replaced by host OS
npx0: [FAST]
npx0: <math processor> on motherboard
npx0: INT 16 interface
acpi0: <PTLTD   RSDT> on motherboard
acpi0: Power Button (fixed)
acpi_ec0: <Embedded Controller: GPE 0x1c> port 0x66,0x62 on acpi0
Timecounter "ACPI-fast" frequency 3579545 Hz quality 1000
acpi_timer0: <24-bit timer at 3.579545MHz> port 0x1008-0x100b on acpi0
cpu0: <ACPI CPU (2 Cx states)> on acpi0
acpi_throttle0: <ACPI CPU Throttling> on cpu0
acpi_button0: <Sleep Button> on acpi0
acpi_lid0: <Control Method Lid Switch> on acpi0
pcib0: <ACPI Host-PCI bridge> port 0xcf8-0xcff on acpi0
pci_link0: <ACPI PCI Link LNKC> irq 0 on acpi0
pci_link1: <ACPI PCI Link LNKB> irq 10 on acpi0
pci_link2: <ACPI PCI Link LNKA> irq 10 on acpi0
pci_link3: <ACPI PCI Link LNKD> irq 11 on acpi0
pci_link4: <ACPI PCI Link LNKH> irq 10 on acpi0
pci0: <ACPI PCI bus> on pcib0
agp0: <Intel 82845G host to AGP bridge> mem 0xe8000000-0xefffffff 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)
uhci0: <Intel 82801DB (ICH4) USB controller USB-A> port 0x1cc0-0x1cdf irq 10 at device 29.0 on pci0
uhci0: [GIANT-LOCKED]
usb0: <Intel 82801DB (ICH4) USB controller USB-A> 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
uhci1: <Intel 82801DB (ICH4) USB controller USB-B> port 0x1ce0-0x1cff irq 11 at device 29.1 on pci0
uhci1: [GIANT-LOCKED]
usb1: <Intel 82801DB (ICH4) USB controller USB-B> on uhci1
usb1: USB revision 1.0
uhub1: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub1: 2 ports with 2 removable, self powered
ehci0: <EHCI (generic) USB 2.0 controller> mem 0xe0000000-0xe00003ff irq 10 at device 29.7 on pci0
ehci0: [GIANT-LOCKED]
ehci_pci_attach: companion usb0
ehci_pci_attach: companion usb1
usb2: EHCI version 1.0
usb2: companion controllers, 2 ports each: usb0 usb1
usb2: <EHCI (generic) USB 2.0 controller> on ehci0
usb2: USB revision 2.0
uhub2: Intel EHCI root hub, class 9/0, rev 2.00/1.00, addr 1
uhub2: single transaction translator
uhub2: 4 ports with 4 removable, self powered
pcib2: <ACPI PCI-PCI bridge> at device 30.0 on pci0
pci_link5: <ACPI PCI Link LNKF> irq 0 on acpi0
pci_link6: <ACPI PCI Link LNKG> irq 0 on acpi0
pci_link7: <ACPI PCI Link LNKE> irq 0 on acpi0
pci2: <ACPI PCI bus> on pcib2
bfe0: <Broadcom BCM4401 Fast Ethernet> mem 0xe0204000-0xe0205fff irq 10 at device 1.0 on pci2
miibus0: <MII bus> on bfe0
bmtphy0: <BCM4401 10/100baseTX PHY> on miibus0
bmtphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
bfe0: Ethernet address: 00:0b:db:18:b5:9c
cbb0: <TI4510 PCI-CardBus Bridge> irq 10 at device 4.0 on pci2
cardbus0: <CardBus bus> on cbb0
pccard0: <16-bit PCCard bus> on cbb0
fwohci0: <1394 Open Host Controller Interface> mem 0xe0200000-0xe0203fff,0xe0206000-0xe02067ff irq 10 at device 4.1 on pci2
fwohci0: OHCI version 1.10 (ROM=0)
fwohci0: No. of Isochronous channels is 4.
fwohci0: EUI64 00:c0:4f:38:02:dc:d4:10
fwohci0: Phy 1394a available S400, 2 ports.
fwohci0: Link S400, max_rec 2048 bytes.
firewire0: <IEEE1394(FireWire) bus> on fwohci0
fwe0: <Ethernet over FireWire> on firewire0
if_fwe0: Fake Ethernet address: 02:c0:4f:dc:d4:10
fwe0: Ethernet address: 02:c0:4f:dc:d4:10
fwe0: if_start running deferred for Giant
sbp0: <SBP-2/SCSI over FireWire> on firewire0
fwohci0: Initiate bus reset
fwohci0: node_id=0xc000ffc0, gen=1, CYCLEMASTER mode
firewire0: 1 nodes, maxhop <= 0, cable IRM = 0 (me)
firewire0: bus manager 0 (me)
isab0: <PCI-ISA bridge> at device 31.0 on pci0
isa0: <ISA bus> on isab0
atapci0: <Intel ICH4 UDMA100 controller> port 0x2020-0x202f,0x376,0x170-0x177,0x3f6,0x1f0-0x1f7 at device 31.1 on pci0
ata0: channel #0 on atapci0
ata1: channel #1 on atapci0
pci0: <serial bus, SMBus> at device 31.3 (no driver attached)
pcm0: <Intel ICH4 (82801DB)> port 0x1c80-0x1cbf,0x1400-0x14ff mem 0xe0000800-0xe00008ff,0xe0000c00-0xe0000dff irq 10 at device 31.5 on pci0
pcm0: [GIANT-LOCKED]
pcm0: <SigmaTel STAC9750/51 AC97 Codec>
pci0: <simple comms> at device 31.6 (no driver attached)
acpi_tz0: <Thermal Zone> on acpi0
acpi_button1: <Power Button> 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 Synaptics Touchpad, device ID 0
acpi_acad0: <AC Adapter> on acpi0
acpi_cmbat0: <Control Method Battery> on acpi0
pmtimer0 on isa0
orm0: <ISA Option ROMs> at iomem 0xe0000-0xe3fff,0xdf800-0xdffff,0xd0000-0xd17ff,0xcf000-0xcffff,0xc0000-0xcefff on isa0
ppc0: parallel port not found.
sc0: <System console> at flags 0x100 on isa0
sc0: VGA <16 virtual consoles, flags=0x300>
sio0: configured irq 4 not in bitmap of probed irqs 0
sio0: port may not be enabled
sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0
sio0: type 8250 or not responding
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 2790719580 Hz quality 800
Timecounters tick every 1.000 msec
acd0: CDRW <HL-DT-STCD-RW/DVD-ROM GCC-4240N/D110> at ata0-master UDMA33
ad2: 38154MB <IC25N040ATCS05-0/CS4OA63A> [77520/16/63] at ata1-master UDMA100
cd0 at ata0 bus 0 target 0 lun 0
cd0: <HL-DT-ST RW/DVD GCC-4240N D110> Removable CD-ROM SCSI-0 device 
cd0: 33.000MB/s transfers
cd0: Attempt to query device size failed: NOT READY, Medium not present
Trying to mount root from ufs:/dev/ad2s1a
WARNING: / was not properly dismounted
WARNING: /usr was not properly dismounted
/usr: mount pending error: blocks 16 files 1
WARNING: /var was not properly dismounted
WARNING: /var/log was not properly dismounted