Disable power_save mode on intel sound card to avoid loud pops and clicks

12. 8. 2019

This seems unrelated to pulse or alsa, but related to snd_hda_intel driver.

inxi -A    
Audio:     Device-1: Intel 82801JI HD Audio driver: snd_hda_intel 
           Sound Server: ALSA v: k4.19.0-5-amd64 

https://askubuntu.com/questions/162419/how-do-i-fix-laptop-speakers-popping-when-no-sound-is-playing/175787

Script called audio-power-save-off

#!/bin/bash
# audio-power-save-off
for dev in /sys/module/snd_*; do
        [ -w "$dev/parameters/power_save" ] || continue
        echo 0 > "$dev/parameters/power_save"
done

and run as sudo.

To run at boot as root (systemd way)

cd /lib/systemd/system
sudo vi antipop.service

holds

[Unit]
Description=Antipop service

[Service]
ExecStart=/home/b/bin/audio-power-save-off

[Install]
WantedBy=multi-user.target

then

sudo systemctl start antipop.service
sudo systemctl enable antipop.service 
#Created symlink /etc/systemd/system/multi-user.target.wants/antipop.service → /lib/systemd/system/antipop.service.

Note: sudo crontab -e, @reboot way didn’t work.

General notes ↓

https://www.techtimejourney.net/how-to-blacklist-a-sound-card-in-linux/

edit: In 2020 John finds a better way ↓

to make power_safe permanent:

https://forums.bunsenlabs.org/viewtopic.php?pid=106454#p106454

Quote: By adding this text

options snd_hda_intel power_save=0

/etc/modprobe.d/audio_disable_powersave.conf

linux audio