From mboxrd@z Thu Jan  1 00:00:00 1970
From: Takashi Iwai <tiwai@suse.de>
Subject: Re: Headphones not detected when using Dell Dock WD15
Date: Tue, 09 May 2017 08:15:05 +0200
Message-ID: <s5h8tm68sk6.wl-tiwai@suse.de>
References: <1494236073.2669.21.camel@igalia.com>
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To: Sergio Villar Senin <svillar@igalia.com>
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On Mon, 08 May 2017 11:34:33 +0200,
Sergio Villar Senin wrote:
> 
> Hi,
> 
> I reported this bug to pulseaudio[1] but after some investigation it
> looks like the alsa mixer is not working for the dock.
> 
> I'll be happy to provide any additional info which might be required
> (attaching alsa-info.sh BTW). Please add me to the Cc as I am not
> subscribed to this list

Did you try to update the dock BIOS?
The old BIOS on some Dell docks had a few known issues.


Takashi