Power consumption tuning

Aleksander Alekseev afiskon at devzen.ru
Wed Aug 10 18:43:40 UTC 2016

Hello, Ian.

Thanks for a detailed reply!

> Well [1] stresses the importance of using maximum available C-states
> on your hardware.  But except for powerd and C-states where possible,
> I wouldn't bother with all that to save an extra few watts on a
> desktop. 
>  > [1] https://wiki.freebsd.org/TuningPowerConsumption  

Well, I took a look on /etc/defaults/rc.conf and discovered that
default values are:


Since article describes C3 as a pretty dangerous thing I doubt that
these parameters are worth tuning in my case.

> What hardware?  What OS version?

11.0-beta4 on Fujitsu Lifebook E733 laptop. BTW it's a great laptop for
FreeBSD. Works everything including Wi-Fi adapter and hibernation.
I didn't check bluetooth, webcam and fingerprint scanner though. I
disabled this stuff in BIOS a long time ago since I don't use it anyway.

Best regards,
Aleksander Alekseev

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