Squeezing a bit more powersaving from Linux / 2017-02-06

The c't magazine this month had a few tips on linux powersaving. I tried them on the homeserver and saw indeed a very slight reduction in power use as logged by the UPS.

For powersaving in sound card(s):

# echo 1 > /sys/module/snd_hda_intel/parameters/power_save

This can cause plopping sounds on some sound cards.

For powersaving in disk communication:

# cd /sys/class/scsi_host/
# for i in host*/link_power_management_policy; do echo min_power > "$i"; done