panic after update

[Kevin Oberman]

> Date: Wed, 8 Oct 2003 21:14:36 -0700
> From: Joao Pedras <jpedras at webvolution.net>
> Sender: owner-freebsd-stable at freebsd.org
> 
> 
> Hi all,
> 
> After going over the usual steps to update my laptop (thinkpad A31) to today's -stable I get
> a kernel panic when booting the new kernel. I didn't change anything in the kernel
> config or anywhere else for that matter. This laptop has been running sucessfully several 
> versions of -stable over the last year.
> 
> buildworld, buildkernel and friends were 100% sucessfull.
> 
> Any insight into this matter is appreciatted.
> 
> Here is the output:
> 
> apm0: <APM BIOS> on motherboard
> Kernel trap 12 with interrupts disabled
> Fatal trap 12: page fault while in kernel mode
> fault virtual address		= 0x36
> fault code			= supervisor write, page not present
> instruction pointer		= 0x8:0xc025b240
> stack pointer			= 0x10:0xc0436d6e
> frame pointer			= 0x10:0xc0436e0e
> code segment			= base 0x0, limit 0xfffff, type 0x1b
> 				= DPL 0, pres 1, def 32 1, gran 1
> processor eflags		= interrupt enabled, resume, IOPL = 0
> current process 		= 0 (swapper)
> interrupt mask			= net tty bio com
> trap number			= 12
> panic: page fault
> uptime : 0s
> Automatic reboot in 15 seconds

This looks like it MIGHT be an APM problem which Peter Wemm found and
fixed in CURRENT about a week ago. As far as I know, this is the first
report of the problem on a STABLE system (if it's the same problem).

Try building a new kernel without APM (and don't load it in
/boot/loader.conf, either). If this allows the system to boot, please
submit a PR so that the few people who understand the locore.s stuff
well enough to have a chance to find it can get it fixed. (I am not
one of those people.)
-- 
R. Kevin Oberman, Network Engineer
Energy Sciences Network (ESnet)
Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab)
E-mail: oberman at es.net			Phone: +1 510 486-8634