ACPI causes page fault/panic upon reboot

[John Baldwin]

On 28-Dec-2003 Dan Hulme wrote:
> When I reboot my FreeBSD 5.2RC2 machine, I get the following message 
> every time.  This is an HP pavilion 6740C with an additional network 
> card (realtek of some kind).  If you need more info, let me know.  The 
> problem doesn't bother me, except that rebooting takes an extra 15 
> seconds, but it seems to be some kind of bug in ACPI.
> 
> -Dan
> 
> ------------------------
> 
> Shutting down ACPI
> 
> Fatal trap 12: page fault while in kernel mode
> fault virtual address    = 0x18
> fault code                = supervisor write, page not present
> instruction pointer        = 0x8:0xc05fd8c5
> stack pointer            = 0x10:0xd032cc90
> frame pointer            = 0x10:0xd032ccc0
> 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            = 19 (irq9: rl0 dc0 acpi0)
> trap number                = 12
> panic: page fault
> Uptime: 25m41s
> Shutting down ACPI

Can you build a debug kernel, reproduce the panic, and then do a list
from gdb on your kernel.debug of the instruction pointer?  For example,
from the above you do:

gdb -k kernel.debug
l *0xc05fd8c5

-- 

John Baldwin <jhb at FreeBSD.org>  <><  http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve!"  -  http://www.FreeBSD.org/