Hi,
Because of a bug-report about power-saving related plops/clocks on a Lenovo T470s, I've asked inside Red Hat if people with a T470s and running a recent kernel were also experiencing this.
Most people are happy with the audio, but I did get a few bug reports about plops on the headphones-jack.
One of the suggestions which I got from 2 different users is to disable power-saving for the HDA driver when on AC, esp. since most headphones-jack use (esp. with an external amplifier which amplifies the problem) is done while the laptop is sitting on a desk and thus typically is connected to a charger.
I'm personally not necessarily a fan of changing settings based on being connected to ac or not, but I guess that in this case it might not be such a bad idea ?
Regards,
Hans