Arch Linux

mehkir

Member

Registered: 2021-12-12

Posts: 6

[SOLVED] Crackling/Pop and constant ACPI events with front panel audio

I'am getting constantly ACPI events (inspected with journalctl --reverse):
ACPI group/action undefined: jack/headphone / HEADPHONE
ACPI group/action undefined: jack/microphone / MICROPHONE

With pulseaudio and jack2 this events correlated with short cracklings during audio playback over my headphones plugged into the front panel.
I don't have any issues with my headphones plugged into the back I/O lineout of my PC.
I tried https://wiki.archlinux.org/title/PulseA … _crackling but got no improvements.
Since I have dual boot with Windows I tested it successfully without any crackling using Windows.
After some research I replaced pulseaudio and jack2 with pipewire.
With Pipewire, I no longer have cracklings during audio playback, but I can still see the ACPI events I mentioned.
So Pipewire can handle audio playback despite the ACPI events.
But I still hear crackling at the beginning of audio playback after about a minute of no audio playback.
Also I hear crackling whenever a concurrent audio playback is stopped.

I tried to get a better idea of this by trying to disable lineout at the back I/O to exclude that my system wants to route sound to lineout first regardlessly if headphones are plugged in at front panel.
But I didn't find a way of how to disabling lineout because solutions like https://askubuntu.com/questions/1061414 … ice-switch don't work for me because I have no /etc/pulse/default.pa file.

EDIT: I referred to pops falsely as cracklings.

Last edited by mehkir (2021-12-20 13:32:17)

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 23,944

Re: [SOLVED] Crackling/Pop and constant ACPI events with front panel audio

Make sure the jack is actually fully and properly plugged, spurious jack events like these come often down to not having it plugged properly.

mehkir

Member

Registered: 2021-12-12

Posts: 6

Re: [SOLVED] Crackling/Pop and constant ACPI events with front panel audio

It is fully and properly plugged in.
I also have to apologize that i referred to my issue with crackling.
My issue were pops and i solved them with https://gitlab.freedesktop.org/pipewire … ng-a-sound.
I additionally added power_save_controller="N":
    options snd_hda_intel power_save="0" power_save_controller="N"
Maybe it works also without setting the power_save_controller option.
The ACPI events are still there.
Now I realized audio cut outs and tried to solve it with this https://wiki.archlinux.org/title/PipeWi … rt_playing but did not got any improvement.
But this should be in another topic.

Thanks for the help.