Dell gx280 and acpi problems

[Danny Braniss]

could some acpi expert shed some light?

-current panics on boot with BIOS default settings (Suspend Mode is S3)
fix: set Power Management/Suspend Mode to S1 in BIOS

disabling ACPI on boot is not good, since this box has no PS/2, and the USB
keyboard/mouse don't work with ACPI off.

the acpi dumps are available from:
	ftp://ftp.cs.huji.ac.il/users/danny/freebsd/gx280

this is the panic:


KDB: debugger backends: ddb
KDB: current backend: ddb
Copyright (c) 1992-2004 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 5.3-BETA5 #14: Tue Sep 21 13:44:32 IDT 2004
    danny at new-dev:/r+d/obj/new-dev/r+d/5.3/src/sys/HUJI
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: Intel(R) Pentium(R) 4 CPU 3.00GHz (2992.52-MHz 686-class CPU)
  Origin = "GenuineIntel"  Id = 0xf34  Stepping = 4
  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>
  Hyperthreading: 2 logical CPUs
real memory  = 1063813120 (1014 MB)
avail memory = 1031565312 (983 MB)
kernel trap 12 with interrupts disabled


Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address   = 0x1c
fault code              = supervisor write, page not present
instruction pointer     = 0x8:0xc075dab5
stack pointer           = 0x10:0xc0c21be0
frame pointer           = 0x10:0xc0c21cac
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = 0 ()
[thread 0]
Stopped at      vm_fault+0x1b1: lock cmpxchgl   %ecx,0x1c(%edx)
db> trace
vm_fault(c103a000,c1004000,1,0,c08e36c0) at vm_fault+0x1b1
trap_pfault(c0c21d14,0,c1004c29) at trap_pfault+0x184
trap(fffd0018,c1000010,c0c20010,c1004bfd,7) at trap+0x2f1
calltrap() at calltrap+0x5
--- trap 0xc, eip = 0xc0a18574, esp = 0xc0c21d54, ebp = 0xc0c21d74 ---
madt_probe(c22264f0,c08bb1f0,c0c21d98,c05e8302,0) at madt_probe+0x174
apic_init(0,c1ec00,c1e000,0,c0441225) at apic_init+0x47
mi_startup() at mi_startup+0x96
begin() at begin+0x2c