[Bug 200526] [snd_hda] hissing/static noise from headphone jack on Dell Precision M4800

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=200526

felselva at protonmail.com changed:

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                 CC|                            |felselva at protonmail.com

--- Comment #21 from felselva at protonmail.com ---
Hi,

I was having the same problem, with the internal analog working fine (Realtek
ALC255), and the output of headphones (also Realtek ALC255) with distortion.

This was the solution for me:
https://discourse.trueos.org/t/distorted-sound-in-headphones-only/2818/8

I switched to the headphones:
- sysctl hw.snd.default_unit=4

Then I tweaked with the PCM levels with the mixer:
- mixer pcm 50:100

The solution for me was exactly that difference in level between the two
outputs (50:100, but other values can be used too).

Hopefully this is the case for everyone, because I've googled around a lot and
this problem isn't so uncommon.

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