Verify how is your sound card's power_save parameter:
# cat /sys/module/snd_hda_intel/parameters/power_save
If it returns 1, do the following to change it temporally:
# echo "0" | sudo tee /sys/module/snd_hda_intel/parameters/power_save
If the previous step worked for you, persist that configuration (otherwise the problem will continue after reboot):
# echo "options snd_hda_intel power_save=0" | sudo tee -a /etc/modprobe.d/audio_disable_powersave.conf
(Optional) You can also do the same for power_save_controller parameter following the steps 1, 2 and replacing power_save by power_save_controller also changing 0 to N.
Note: using the first step will probably return Y for this parameter, instead of 1.
Solution tested in a laptop Asus x456UF, its works nice!
Source:
https://askubuntu.com/questions/1230833/annoying-click-popping-sound-on-ubuntu-20-04
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