5.3-BETA hangs on Acer TM290 series Laptop

Hi,

I tried to boot 5.3-BETA on my TM291 (Centrino, "hotpluggable" 
DVD/CDRW-Combo, bg2200 WLAN).

It hangs after the first few lines of boot messages and has to be 
rebooted the hard way (press power-off for four seconds)..

I began to try with 5.2.1 Release, several jp-snapshots, and 
finally these days 5.3-BETA and the AUG-27 snapshot from 
snapshots.se.freebsd.org.

(4-stable doesn't recognice the DVD/CDRW-Combo..  it can't load 
the kernel, so I can't try there..)

I typed the screen messages from the AUG-27 snapshot from both a 
"boot" and a "boot -v".  (see below).

Any help is very much appreciated..

Thanks very much,
Robert

--- "boot -v" screen messages ---
	cmdreg=0x0006, statreg=0x2090, cachelnsz=0 (dwords)
	lattimer=0x00 (0 ns), mingnt=0x00 (0 ns), maxlat=0x00 (0 ns)
found-> vendor=0x8086, dev=0x3584, revid=0x02
	bus=0, slot=0, func=1
	class=08-80-00, hdrtype=0x00, mfdev=0
	cmdreg=0x0006, statreg=0x0080, cachelnsz=0 (dwords)
	lattimer=0x00 (0ns), mingnt=0x00 (0ns), maxlat=0x00 (0 ns)
found-> vendor=0x8086, dev=0x3585, revid=0x02
	bus=0, slot=0, func=3
	class=08-80-00, hdrtype=0x00, mfdev=1
	cmdreg=0x0006, statreg=0x0080, cachelnsz=0 (dwords)
	lattimer=0x00 (0ns), mingnt=0x00 (0 ns), maxlat=0x00 (0 ns)
	map[10]: type 3, range 32, base b0000000, size 27, enabled
	map[14]: type 1, range 32, base f0000000, size 19, enabled
	map[18]: type 4, range 32, base 0000e000, size  3, enabled
$PIR: 0:2 INTA routed to IRQ 11
found-> vendor=0x8086, dev=0x3582, revid=0x02
	bus=0, slot=2, func=0
	class=03-00-00, hdrtype=0x00, mfdev=1
	cmdreg=0x0007, statreg=0x0090, cachelnsz=0 (dwords)
	lattimer=0x00 (0 ns), mingnt=0x00 (0 ns), maxlat=0x00 (0 ns)
	intpin=a, irq=11
	powerspec 1  supports D0 D1 D3  current D0
	map[10]: type 3, range 32, base 00000000, size 27, memory 
disabled

--- "boot" screen messages ---
GDB: no debug ports present
KDB: debugger backends: ddb
KDB: current backend: ddb
Copyright (c) 1992-2004 The FreeBSD Project.
Copyight (x) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 
1993, 1994
	The Regents of the University of California. All rights 
reserved.
FreeBSD 5.3-BETA1 #0: Fri Aug 27 06:47:29 UTC 2004
    root_at_mango.internal.hasta.se:/usr/obj/usr/src/sys/GENERIC
WARNING: WITNESS option enabled, expect reduced performance.
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: Intel(R) Pentium(R) M processor 1400 MHz (1398.82-MHz 
686-class CPU)
  Origin = "GenuineIntel"  ID = 0x695  Stepping = 5
  Features=0xa7e9f9bf<FPU,VME,DE,PSE,TSC,MSR,MCE,CX8,SEP,MTRR,PGE,CMOV,PAT,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,TM,PBE>
real memory  = 520028160 (495 MB)
avail memory = 495034368 (472 MB)
npx0: [FAST
npx0: <math coprocessor> on motherboard
npx0: INT 16 interface
pcib0: <Host to PCI bridge> pcibus 0 on motherboard
pir0: <PCI Interrupt Routing Table: 8 Entries> on motherboard
pci0: <PCI bus> on pcib0