Incpower Sound Cards & Media Devices Driver

The Intel HDA driver has a power-saving mode to suspend the soundcard after some time of inactivity.

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This article describes the setup of power management of sound devices.

Power-saving mode

The Intel HDA driver has a power-saving mode to suspend the soundcard after some time of inactivity.

Kernel

Systems with an AC97 soundcard need to activate the following kernel options:

Systems with a HDA soundcard need to activate the following kernel options:

When the driver is loaded as a module then it may be needed to enable power saving by means of a module parameter:

Inc Power Sound Cards & Media Devices Driver Updater

Runtime tuning

The driver can be tuned in the sysfs filesystem under /sys/module/snd_hda_intel/parameters:

• The power_save_controller knob controls, if power-saving mode is enabled. It is preset by the kernel option ... power-saving ....
• The power_save knob sets the time-out in seconds. It is preset by the kernel option Default time-out ...

pm-utils

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The sys-power/pm-utils package contains a script to enable the power-saving mode when on battery and disable when on AC. It overrides the default values of the kernel.

If you use pm-utils, but don't want this kind of regulation, disable the script:

Inc Power Sound Cards & Media Devices Drivers

PulseAudio

Incpower Sound Cards & Media Devices Driver

If you have an Intel HDA soundcard and use PulseAudio, you probably want the following kernel option to improve power-saving:

Troubleshooting

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If you hear a unwanted click sound, when the power-saving mode enables, disable the power-saving mode in the kernel.