Audio

SOUND_POWER_SAVE_ON_AC/BAT

SOUND_POWER_SAVE_ON_AC=1
SOUND_POWER_SAVE_ON_BAT=1

Timeout (in seconds) for the audio power saving mode (supports Intel HDA, AC97). A value of 1 is recommended for Linux desktop environments with PulseAudio, systems without PulseAudio may require 10. The value 0 disables power save.

Default when unconfigured:

1 (AC), 1 (BAT) - Version 1.4 and higher

0 (AC), 1 (BAT) - Version 1.3.1 and lower

Note

• Power saving mode may cause slight clicks or other disturbances in sound output, see the FAQ: Audio

• 1 for AC is required for automatic power down of Nvidia Optimus GPUs with nouveau driver

• The recommendation of 1 for PulseAudio originates from the pulseaudio-discussion mailing list

SOUND_POWER_SAVE_CONTROLLER

SOUND_POWER_SAVE_CONTROLLER=Y

• Y – power off the controller together with the sound chip

• N – controller remains active

Default when unconfigured: Y