Loud clicks and pops when audio starts

[ghost]

After upgrading to the I2S-enabled 4.4 kernel and going through the appropriate ceremony of two cold boots, sound mostly works, except for one annoying issue: Every time the sound card starts playing (if it's been idle for a few seconds), I get a very loud, annoying "POP", accompanied by the following in my dmesg:

haswell-pcm-audio haswell-pcm-audio: FW loaded, mailbox readback FW info: type 01, - version:  00.00, build 77, source commit id: 876ac6906f31a43b6772b23c7c983ce9dcb18a19

It seems there's some aggressive power management going on, if firmware gets loaded whenever I start playing sound (after a few seconds idle). However, /sys/module/snd_hda_intel/parameters/power_save is set to 0 and /sys/module/snd_hda_intel/parameters/power_save_controller is set to N. The problem exists no matter whether I use PulseAudio or not.

[danijar]

+1

[utack]

Happening here too

[hg8]

Same on mine (Arch).

[mr337]

+1

[antonmry]

I was able to solve it in Fedora upgrading alsa-lib and alsa-ucm to version 1.1.1-1. More info here: https://bugzilla.redhat.com/show_bug.cgi?id=1313434

[utack]

Seems fixed?