Public bug reported:

The 3,5mm jack of the ThinkPad USB-C Dock Gen2 does not output any
sounds.

The USB Device is 17ef:30d1 Lenovo ThinkPad USB-C Dock Gen2 USB Audio

On the software side everything seems normal, I see output controls and
everything.

As soon as this USB is passed through to a Windows VM and back, sound
works.

A quick look in snd-usb-audio gave no clue and I have no idea how to
debug such things, but Windows seems to do some magic when initializing
this device. That Initializations seems to be persistent until powerdown

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/2102208

Title:
  Lenovo ThinkPad USB-C Dock Gen2 USB Audio does not output audio

Status in linux package in Ubuntu:
  New

Bug description:
  The 3,5mm jack of the ThinkPad USB-C Dock Gen2 does not output any
  sounds.

  The USB Device is 17ef:30d1 Lenovo ThinkPad USB-C Dock Gen2 USB Audio

  On the software side everything seems normal, I see output controls
  and everything.

  As soon as this USB is passed through to a Windows VM and back, sound
  works.

  A quick look in snd-usb-audio gave no clue and I have no idea how to
  debug such things, but Windows seems to do some magic when
  initializing this device. That Initializations seems to be persistent
  until powerdown

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