[alsa-devel] Constant headphone noise on Dell XPS 13 9365

[Takashi Iwai]

On Wed, 31 May 2017 18:50:30 +0200,
Felipe Contreras wrote:
> 
> Hi,
> 
> Since I bought this machine I've always heard audio noise when I plug
> the headphones. This laptop has Intel HDA with the Realtec codec.
> 
> This has happened in all the Linux versions I've tried, and I've also
> tried HDA Analyzer and changed every value I could find and nothing
> helps.
> 
> The only value that seems to have an effect is "Headphone Playback
> Switch"; if I mute it I don't hear the noise any more, but I don't
> hear any audio either.
> 
> Lowering the volume to zero doesn't help either, the noise remains at
> the same audible level.
> 
> I'm running 4.11.3 at the moment. Any ideas?

Is there "Loopback Mixer" switch?  If yes and it's on, try to turn it
off.  The analog loopback is often the source of the unknown noise.

Other than that, try to apply the existing quirks.  Some of them are
applicable via model option of snd-hda-intel module.


Takashi