Laptop w/ dark screen & no (working) keyboard

David Wolfskill david at
Tue Dec 9 23:01:35 UTC 2008

This would be a freshly-built CURRENT; sources as of around 0330 hrs.
US/Pacific this morning.

Breaking into the debugger (Ctl+Atl+Esc), I see on the serial console:

KDB: enter: manual escape to debugger
[thread pid 12 tid 100020 ]
Stopped at      kdb_enter+0x3a: movl    $0,kdb_why
db> bt
Tracing pid 12 tid 100020 td 0xc4e766c0
kdb_enter(c0b6de50,c0ba2bbb,1,0,1,...) at kdb_enter+0x3a
scgetc(c0cf5fd0,0,c0ba2ae5,26b,c085148c,...) at scgetc+0x53f
sckbdevent(c4de0300,0,c0e874a0,c4dac880,c4a78c64,...) at sckbdevent+0x224
kbdmux_intr(c4de0300,0,c4dac898,c4e6a7c0,c4dac898,...) at kbdmux_intr+0x2b
kbdmux_kbd_intr(c4de0300,1,c0bb8e10,54,c4e6a7dc,...) at kbdmux_kbd_intr+0x25
taskqueue_run(c4e6a7c0,c4a78cc8,c07f14e5,0,0,...) at taskqueue_run+0x10b
taskqueue_swi_giant_run(0,0,c0bb0715,46d,c4dac038,...) at taskqueue_swi_giant_run+0x13
intr_event_execute_handlers(c4d677ec,c4dac000,c0bb0715,4dd,c4dac070,...) at intr_event_execute_handlers+0x125
ithread_loop(c4e749d0,c4a78d38,c0bb0490,32d,c4d677ec,...) at ithread_loop+0x9f
fork_exit(c07f20c0,c4e749d0,c4a78d38) at fork_exit+0xb8
fork_trampoline() at fork_trampoline+0x8
--- trap 0, eip = 0, esp = 0xc4a78d70, ebp = 0 ---
db> show locks
exclusive sleep mutex Giant (Giant) r = 1 (0xc0cf5fd0) locked @ /usr/src/sys/dev/kbdmux/kbdmux.c:1044

Anything else I can try to extract from this that might be useful?

David H. Wolfskill				david at
Depriving a girl or boy of an opportunity for education is evil.

See for my public key.
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