kern/128308: psm0 cause page fault

[kevin]

>Number:         128308
>Category:       kern
>Synopsis:       psm0 cause page fault
>Confidential:   no
>Severity:       serious
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Thu Oct 23 03:40:01 UTC 2008
>Closed-Date:
>Last-Modified:
>Originator:     kevin
>Release:        8.0current
>Organization:
163.org
>Environment:
FreeBSD laptop.163.org 8.0-CURRENT FreeBSD 8.0-CURRENT #6: Tue Oct 21 12:55:46 CST 2008     root at laptop.163.org:/usr/obj/usr/src/sys/G8laptop  amd64

>Description:
Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address   = 0xfffffffe682d7628
fault code              = supervisor write data, page not present
instruction pointer     = 0x8:0xffffffff804fc8ba
stack pointer           = 0x10:0xfffffffee6fbcb30
frame pointer           = 0x10:0xfffffffee6fbcbb0
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = 12 (irq12: psm0)
trap number             = 12
panic: page fault
cpuid = 0
Uptime: 1h8m47s
Physical memory: 4017 MB
----------------
I switch X11's synaptics to kernel's synapticstouchpad driver(http://wiki.freebsd.org/SynapticsTouchpad).
sysctl:
hw.psm.synaptics_support="1" 
It works well.but yesterday I noticed the touchpad not work in X.when i logined in the console and tried to use touchpad,system panic.
system:lenovo T61
>How-To-Repeat:

>Fix:


>Release-Note:
>Audit-Trail:
>Unformatted: