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 newer0 (AC), 1 (BAT) - Version 1.3
Note
Power saving mode may cause slight clicks or other disturbances in sound output, see the FAQ: Audio
Audio power saving mode is a prerequisite for automatic power down of Nvidia Optimus GPUs
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
See also
Settings: Introduction
FAQ: Audio