Comment 12 for bug 1821663

It is an issue of power_save setting. It is not a driver's code issue, it is a kconfig issue. From rc4, the CONFIG_SND_HDA_POWER_SAVE_DEFAULT is set to 1 rather 0, then the codec enables the runtime PM, that introduce the noise.

You can workaround it by adding an module parameter (/etc/modprobe.d/alsa-base.conf, add a new line in this file and reboot. "options snd-hda-intel power_save=0".

And I will change the driver's code, and upload a new dkms, if that dkms works, you don't need to add that module parameter anymore.