[SOLVED] Speakers work but not Headphones (works in ubuntu)

[Kruppe]

I'm running Gentoo on a Dell XPS 13 9350 (2016).

I've run into a confusing problem with my audio. Speakers work, but headphones don't. I went through the following usual checks:

1. check pavucontrol for muted or low volume devices (I can see the movement of the bar as applications are playing, but I get no sound through them).
2. check alsamixer for mute/volume
3. paplay and aplay directly to the device
4. deleting ~/.config/pulse and restarting pulseaudio
5. tried booting ubuntu off a stick, everything works!

But for the life of me I can't seem to get the card to work on my Gentoo install.

The next thing I'm gonna try is using Ubuntu's kernel config, then any other sound related configurations I can find, but wondering if anyone else has run into this, or has any insight or suggestions, especially after looking at the alsa-info output (for Gentoo):

http://www.alsa-project.org/db/?f=d434dc6749076f5ad8f99721ac293385ad2aac02

Here is the alsa-info for Ubuntu:

http://www.alsa-project.org/db/?f=6fc5bf94f17fca970aecfcfce218c250a6baffec

Edit: added alsa-info for ubuntu

[Roman_Gruber]

did you read out the ubutnu kernel config

You can

[Kruppe]

After much experimentation, and examining the diff between ubuntu's alsa-info.sh and Gentoo's, it ended up being the versions of alsa-lib/plugins/utils.