Bug 205071

Summary: No sound on Dell WD15 dock
Product: Drivers Reporter: Jean-Louis Dupond (jean-louis)
Component: Sound(ALSA)Assignee: Jaroslav Kysela (perex)
Status: RESOLVED OBSOLETE    
Severity: high CC: jean-louis
Priority: P1    
Hardware: All   
OS: Linux   
Kernel Version: 5.3.2 Subsystem:
Regression: No Bisected commit-id:
Attachments: alsa-info.sh output

Description Jean-Louis Dupond 2019-10-02 12:09:14 UTC 
I have a Dell WD15 dock which has 2 audio jacks.

Both are shown correctly in ALSA/PulseAudio, but when playing audio, both outputs remain silent.
When the dock is tested on a Windows machine, there is audio output. So the dock seems to work fine.

alsamixer doesn't show any controls for both outputs are they are removed via a quirk.
I tried building 5.3.2 with the following patch reverted:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/sound/usb?h=v5.4-rc1&id=adcdd0d5a1cb779f6d455ae70882c19c527627a8

Then I can set the volume level via alsamixer, but still no sound playing!.

Did also a test via aplay, but neither this does give me any sound.
Comment 1 Jean-Louis Dupond 2019-10-02 12:14:04 UTC 
Created attachment 285303 [details]
alsa-info.sh output
Comment 2 Jean-Louis Dupond 2019-10-02 12:33:06 UTC 
Also tested the following patch:
https://mailman.alsa-project.org/pipermail/alsa-devel/2019-June/151048.html

But no change
Comment 3 Jean-Louis Dupond 2020-01-15 08:17:01 UTC 
This seems to have starting to work in latest kernel / pulseaudio. Closing!