Toshiba Portege R100: 5.1-JPSNAP install CD hangs

Hi,

booting a Toshiba Portege R100 off Wednesday's 5.1-JPSNAP install CD 
hangs early during the boot, with or without ACPI. It may be related to 
probing the graphics chip, see the attached snapshot.

I've also attached the 4.9 dmesg - 4.9 boots fine off its install CD - 
in case that helps.

Any ideas?

Thanks,
Lars

PS: Sorry for posting an image - the laptop has no serial port.
-- 
Lars Eggert <larse_at_isi.edu>           USC Information Sciences Institute

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.
FreeBSD 4.9-RELEASE #0: Mon Oct 27 17:51:09 GMT 2003
    root_at_freebsd-stable.sentex.ca:/usr/obj/usr/src/sys/GENERIC
Timecounter "i8254"  frequency 1193182 Hz
CPU: Intel(R) Pentium(R) M processor 1000MHz (997.50-MHz 686-class CPU)
  Origin = "GenuineIntel"  Id = 0x695  Stepping = 5
  Features=0xa7e9f9bf<FPU,VME,DE,PSE,TSC,MSR,MCE,CX8,SEP,MTRR,PGE,MCA,CMOV,PAT,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,TM,PBE>
real memory  = 805085184 (786216K bytes)
avail memory = 777445376 (759224K bytes)
Preloaded elf kernel "kernel" at 0xc053f000.
Pentium Pro MTRR support enabled
md0: Malloc disk
Using $PIR table, 7 entries at 0xc00f0200
npx0: <math processor> on motherboard
npx0: INT 16 interface
pcib0: <Host to PCI bridge> on motherboard
pci0: <PCI bus> on pcib0
agp0: <Intel 82855 host to AGP bridge> mem 0xc0000000-0xcfffffff at device 0.0 on pci0
pcib1: <PCI to PCI bridge (vendor=8086 device=3341)> at device 1.0 on pci0
pci1: <PCI bus> on pcib1
pci1: <Trident model 2100 VGA-compatible display device> at 0.0 irq 11
uhci0: <Intel 82801DB (ICH4) USB controller USB-A> port 0xefe0-0xefff irq 11 at device 29.0 on pci0
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 0xef80-0xef9f irq 11 at device 29.1 on pci0
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
pci0: <USB controller> at 29.7
pcib2: <PCI to PCI bridge (vendor=8086 device=2448)> at device 30.0 on pci0
pci2: <PCI bus> on pcib2
fxp0: <Intel 82801DB (ICH4) Pro/100 VE Ethernet> port 0xcf40-0xcf7f mem 0xdfdff000-0xdfdfffff irq 11 at device 8.0 on pci2
fxp0: Ethernet address 00:08:0d:3b:4c:17
inphy0: <i82562ET 10/100 media interface> on miibus0
inphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
pci2: <unknown card> (vendor=0x8086, dev=0x1043) at 10.0 irq 11
pci_cfgintr_linked: linked (60) to hard-routed irq 11
pci_cfgintr: 2:11 INTA routed to irq 11
pcic0: <Toshiba ToPIC100 PCI-CardBus Bridge> irq 11 at device 11.0 on pci2
pcic0: PCI Memory allocated: 0x88000000
pccard0: <PC Card 16-bit bus (classic)> on pcic0
pci2: <unknown card> (vendor=0x1179, dev=0x0805) at 13.0
isab0: <PCI to ISA bridge (vendor=8086 device=24cc)> at device 31.0 on pci0
isa0: <ISA bus> on isab0
atapci0: <Generic PCI ATA controller> port 0xbfa0-0xbfaf,0xbfe4-0xbfe7,0xbfe8-0xbfef,0xbff4-0xbff7,0xbff8-0xbfff irq 11 at device 31.1 on pci0
ata0: at 0x1f0 irq 14 on atapci0
ata1: at 0x170 irq 15 on atapci0
pci0: <unknown card> (vendor=0x8086, dev=0x24c5) at 31.5
pci0: <unknown card> (vendor=0x8086, dev=0x24c6) at 31.6
orm0: <Option ROMs> at iomem 0xc0000-0xcbfff,0xe0000-0xeffff on isa0
pmtimer0 on isa0
fdc0: ready for input in output
fdc0: cmd 3 failed at out byte 1 of 3
atkbdc0: <Keyboard controller (i8042)> at port 0x60,0x64 on isa0
atkbd0: <AT Keyboard> flags 0x1 irq 1 on atkbdc0
kbd0 at atkbd0
psm0: <PS/2 Mouse> irq 12 on atkbdc0
psm0: model GlidePoint, device ID 0
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
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 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0
sio0: type 8250
sio1: configured irq 3 not in bitmap of probed irqs 0
ppc0: parallel port not found.
ad0: 38147MB <TOSHIBA MK4004GAH> [77506/16/63] at ata0-master BIOSDMA
Mounting root from ufs:/dev/ad0s2a