Fatal trap 12 when enabling wifi.

[sidde]

Hi.
Sometimes immediately, sometimes after a few minutes when I have enabled my wifi the system crashes. In this example, the machine has been running for over a week, then I enable wifi and boom.

Running:
2.0-RELEASE (i386)
built on Tue Sep 13 18:02:53 EDT 2011 on a http://www.fit-pc.com/web/fit-pc2/fit-pc2i-specifications/

Error:
Fatal trap 12: page fault while in kernel mode
cpuid = 1; apic id = 01
fault virtual address  = 0xc5e6c908
fault code              = supervisor read, page not present
instruction pointer    = 0x20:0xc084b582
stack pointer          = 0x28:0xed028c48
frame pointer          = 0x28:0xed028c74
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 (run0 taskq)
trap number            = 12
panic: page fault
cpuid = 1
Uptime: 9d20h48m31s
Cannot dump. Device not defined or unavailable.

The wlan chip is:
run0: MAC/BBP RT3070 (rev 0x0201), RF RT3020 (MIMO 1T1R)
run0: firmware RT2870 loaded

I have seen this thread, same computer with the same trap number error:
http://forum.pfsense.org/index.php/topic,38708.msg199529.html#msg199529

Is there any known problems with this wifi-chip?

How do I save coredumps when booting out of a usb-stick on a nanobsd-kernel? Can I mount another usb-stick and enable a core output on that device so I can backtrace the error?

[wallabybob]

Have you configured the WiFi interface as AP?

[sidde]

@wallabybob:

Have you configured the WiFi interface as AP?

Yep.