On Wed, Jan 06, 2010 at 08:42:12PM +0000, Christos Zoulas wrote: > Try 'shutdown -p now'. I've had problems with deadlocks when using halt -p > due to processes not dying on time and the kernel getting stuck on their > resources (or even panicking).
Another test is: sysctl -w machdep.sleep_state=5 (better not do that while running multiuser). This powers off directly, w/o running the power management handlers. Martin