zsh iapetus# kgdb /boot/kernel/kernel.symbols /var/crash/vmcore.12 GDB will not be able to debug user-mode threads: /usr/lib/libthread_db.so: Undefined symbol "ps_pglobal_lookup"] 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 "amd64-marcel-freebsd". Unread portion of the kernel message buffer: Fatal trap 12: page fault while in kernel mode cpuid = 0; apic id = 00 fault virtual address = 0x0 fault code = supervisor write data, page not present instruction pointer = 0x8:0xffffffffa2e7b26b stack pointer = 0x10:0xffffffffa2de0750 frame pointer = 0x10:0xffffffffa2de0780 code segment = base 0x0, limit 0xfffff, type 0x1b = DPL 0, pres 1, long 1, def32 0, gran 1 processor eflags = interrupt enabled, resume, IOPL = 3 current process = 1853 (Xorg) trap number = 12 panic: page fault cpuid = 0 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x2a panic() at panic+0x17a trap_fatal() at trap_fatal+0x29f trap_pfault() at trap_pfault+0x294 trap() at trap+0x2ea calltrap() at calltrap+0x8 --- trap 0xc, rip = 0xffffffffa2e7b26b, rsp = 0xffffffffa2de0750, rbp = 0xffffffffa2de0780 --- i915_emit_mi_flush() at i915_emit_mi_flush+0x5b i915_dispatch_flip() at i915_dispatch_flip+0x41 i915_driver_lastclose() at i915_driver_lastclose+0x15a drm_lastclose() at drm_lastclose+0x2c drm_close() at drm_close+0x261 giant_close() at giant_close+0x67 devfs_close() at devfs_close+0x1a0 vn_close() at vn_close+0x81 vn_closefile() at vn_closefile+0x69 fdrop() at fdrop+0x13f closef() at closef+0x29 kern_close() at kern_close+0x15d syscall() at syscall+0x254 Xfast_syscall() at Xfast_syscall+0xab --- syscall (6, FreeBSD ELF64, close), rip = 0x80165ed1c, rsp = 0x7fffffffe8b8, rbp = 0x1 --- Uptime: 2h11m55s Physical memory: 986 MB Dumping 118 MB: 103 87 71 55 39 23 7 #0 doadump () at pcpu.h:194 194 pcpu.h: No such file or directory. in pcpu.h (kgdb) bt #0 doadump () at pcpu.h:194 #1 0xffffffff804870b8 in boot (howto=260) at /usr/home/nox/src70/src/sys/kern/kern_shutdown.c:409 #2 0xffffffff80487517 in panic (fmt=Variable "fmt" is not available. ) at /usr/home/nox/src70/src/sys/kern/kern_shutdown.c:563 #3 0xffffffff806f4d8f in trap_fatal (frame=0xc, eva=Variable "eva" is not available. ) at /usr/home/nox/src70/src/sys/amd64/amd64/trap.c:724 #4 0xffffffff806f5174 in trap_pfault (frame=0xffffffffa2de06a0, usermode=0) at /usr/home/nox/src70/src/sys/amd64/amd64/trap.c:641 #5 0xffffffff806f5b2a in trap (frame=0xffffffffa2de06a0) at /usr/home/nox/src70/src/sys/amd64/amd64/trap.c:410 #6 0xffffffff806dac2e in calltrap () at /usr/home/nox/src70/src/sys/amd64/amd64/exception.S:169 #7 0xffffffffa2e7b26b in ?? () #8 0x00000000952063a0 in ?? () #9 0xffffff000315e800 in ?? () #10 0x0000000000000000 in ?? () #11 0x0000000000000003 in ?? () #12 0xffffffffa2de07d0 in ?? () #13 0xffffffffa2e7b421 in ?? () #14 0xffffffffa2de0800 in ?? () #15 0x000000003e69ad98 in ?? () #16 0xffffffff00000002 in ?? () ---Type to continue, or q to quit--- #17 0xffffff000315e800 in ?? () #18 0xffffff000301f000 in ?? () #19 0x0000000000000003 in ?? () #20 0xffffff000301f000 in ?? () #21 0x0000000000000003 in ?? () #22 0xffffffffa2de0800 in ?? () #23 0xffffffffa2e7ca6a in ?? () #24 0xffffff000315e800 in ?? () #25 0xffffff0003037880 in ?? () #26 0xffffff000315e800 in ?? () #27 0xffffff000315e9d8 in ?? () #28 0xffffffffa2de0830 in ?? () #29 0xffffffffa2e7226c in ?? () #30 0xffffffffa2de0830 in ?? () #31 0xffffff000315e800 in ?? () #32 0xffffff0003037880 in ?? () #33 0x0000000000000000 in ?? () #34 0xffffffffa2de0870 in ?? () #35 0xffffffffa2e73071 in ?? () #36 0xffffff00356ffd90 in ?? () #37 0x0000000000000004 in ?? () #38 0xffffff003503b400 in ?? () #39 0xffffff000b02d000 in ?? () ---Type to continue, or q to quit--- #40 0x0000000000002000 in ?? () #41 0x0000000000000003 in ?? () #42 0xffffffffa2de08b0 in ?? () #43 0xffffffff80454f27 in giant_close (dev=0xffffff000315e800, fflag=3, devtype=51767296, td=0x2000003) at /usr/home/nox/src70/src/sys/kern/kern_conf.c:327 Previous frame inner to this frame (corrupt stack?) (kgdb) q zsh iapetus#