On Thu, 05 Mar 2020 15:33:04 +0100, Hans de Goede wrote: > > 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 ? Actually the power-saving-toggle-on-demand used to be the standard behavior by some power management tools including some thinkpad-specific one, IIRC. So the behavior itself isn't too bad if the pop noise can't be fully eliminated. thanks, Takashi
