https://olarila.com/topic/12021-intel-p965-ich8-inconsistent-shutdown/
Intel P965 ICH8 Inconsistent Shutdown - DSDT & Patch Requests - Hackintosh Olarila
Recently upgraded from Mavericks to El Capitan and have got everything working perfectly, except my shutdowns are really inconsistent. Restarts always work...
patch requestsintelinconsistentshutdowndsdt