After tuning a few of my laptops over a few years I started thinking if there are other ways to extract more hours out of our mobile BSD systems.
Below are my power tunings that I consider to be the most significant:
/etc/rc.d # enable C-states performance_cx_lowest="C3" economy_cx_lowest="C3" # powerd tunings powerd_enable="YES" powerd_flags="-a hiadaptive -b adaptive -i 85 -r 60 -p 100" /etc/sysctl.conf # set all states for processor cores to C3 dev.cpu.0.cx_lowest=C3 dev.cpu.1.cx_lowest=C3 dev.cpu.2.cx_lowest=C3 dev.cpu.3.cx_lowest=C3
I would be pleased to learn of any other settings that the rest of you have found useful in your practice. With these I can squeeze 5-6 hours out of Asus UX21E and temperatures are as cool as on Linux. This machine used to run very hot under original (OEM) Windows install!