Hello fellas, I have a 8.1-RELEASE i386 on a Lenovo T400. I have a generic kernel into which I compiled PF+ALTQ, VESA,SC_PIXEL_MODE, VIMAGE, IPSEC, crypto and IPSEC_DEBUG. Earlier today, my usb dongle (Atheros AR5523) did not power up under a linux distro (debian) so I wanted to give it a go under FreeBSD. Unfortunately, I got a fatal trap 12. Bellow I will describe 2 scenarios: Scenario 1: The OS is booted up, and I plug in the USB dongle. First, I get Code: Oct 31 21:01:37 i386 kernel: ugen7.2: <Atheros Communications Inc> at usbus7 Oct 31 21:01:37 i386 kernel: ugen7.2: <Atheros Communications Inc> at usbus7 (disconnected) and the I get the kernel trap (see "pic1" - attachment). Scenario 2: Laptop is powered down. I plug in the dongle and power it up. During the power on, I get some kind of error msg in dmesg (see "pic2"). The pc boots up fine, but when I unplug the dongle, I get the fatal trap again ("pic1"). I noticed the fatal trap was complaining about not being able to dump because no dump device was defined. So I defined one in rc.conf: Code: dumpdev="AUTO" dumpdir="/var/crash" and got 93MB of dump after I plugged in the USB dongle. Here is the output of kgdb: Code: # kgdb kernel.debug /var/crash/vmcore.0 GNU gdb 6.1.1 [FreeBSD] Copyright 2004 Free Software Foundation, Inc. GDB is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. Type "show copying" to see the conditions. There is absolutely no warranty for GDB. Type "show warranty" for details. This GDB was configured as "i386-marcel-freebsd"... Unread portion of the kernel message buffer: ugen7.2: <Atheros Communications Inc> at usbus7 uath0: <Atheros Communications Inc AR5523, rev 2.00/0.01, addr 2> on usbus7 Fatal trap 12: page fault while in kernel mode cpuid = 0; apic id = 00 fault virtual address = 0x18 fault code = supervisor read, page not present instruction pointer = 0x20:0xc098b1ad stack pointer = 0x28:0xe5fb9adc frame pointer = 0x28:0xe5fb9aec 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 = 14 (usbus7) trap number = 12 panic: page fault cpuid = 0 Uptime: 1m57s Physical memory: 1925 MB Dumping 93 MB: 78 62 46 30 14 Reading symbols from /boot/kernel/linux.ko...Reading symbols from /boot/kernel/linux.ko.symbols...done. done. Loaded symbols for /boot/kernel/linux.ko Reading symbols from /boot/kernel/snd_hda.ko...Reading symbols from /boot/kernel/snd_hda.ko.symbols...done. done. Loaded symbols for /boot/kernel/snd_hda.ko Reading symbols from /boot/kernel/sound.ko...Reading symbols from /boot/kernel/sound.ko.symbols...done. done. Loaded symbols for /boot/kernel/sound.ko Reading symbols from /boot/kernel/ahci.ko...Reading symbols from /boot/kernel/ahci.ko.symbols...done. done. Loaded symbols for /boot/kernel/ahci.ko Reading symbols from /boot/kernel/atapicam.ko...Reading symbols from /boot/kernel/atapicam.ko.symbols...done. done. Loaded symbols for /boot/kernel/atapicam.ko Reading symbols from /boot/kernel/acpi_ibm.ko...Reading symbols from /boot/kernel/acpi_ibm.ko.symbols...done. done. Loaded symbols for /boot/kernel/acpi_ibm.ko Reading symbols from /boot/kernel/linprocfs.ko...Reading symbols from /boot/kernel/linprocfs.ko.symbols...done. done. Loaded symbols for /boot/kernel/linprocfs.ko #0 doadump () at pcpu.h:246 246 __asm __volatile("movl %%fs:0,%0" : "=r" (td)); (kgdb) Unfortunately for me, I can't make heads or tails of it. Anyway, since the device was not working under Linux plus FreeBSD, I thought it had some hardware problem but then, I tried it under a Win 7 x64 box and bam, it worked. I know there are no drivers for AR5523 under FreeBSD but my question is this, why is the kernel crashing ? It doesn't look good to me.