Switching kernel to Linux 5.4.28-050428-generic does not resolve the
issue.

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Touch seeded packages, which is subscribed to alsa-driver in Ubuntu.
https://bugs.launchpad.net/bugs/1869481

Title:
  [XPS 13 7390, Intel Kabylake HDMI, Digital Out, HDMI] Playback problem

Status in alsa-driver package in Ubuntu:
  New

Bug description:
  Hi everyone!

  I have Samsung Q90R (7.1 Atmos) soundbar connected to my secondary display.
  The display is connected to my notebook though the soundbar and all sound 
options are displayed in the audio settings.
  Sound through hdmi/displayport was working few days ago. All other sound 
options (internal, headset) are still working.

  (Ubuntu does a great job converting everything to Dolby Atmos 7.1!)

  Kind regards!

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: alsa-base 1.0.25+dfsg-0ubuntu5
  Uname: Linux 5.5.13-050513-generic x86_64
  ApportVersion: 2.20.11-0ubuntu21
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  reshadde   2381 F.... pulseaudio
  CurrentDesktop: ubuntu:GNOME
  Date: Sat Mar 28 11:53:23 2020
  InstallationDate: Installed on 2020-03-21 (6 days ago)
  InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Alpha amd64 (20200315)
  PackageArchitecture: all
  SourcePackage: alsa-driver
  Symptom: audio
  Symptom_AlsaPlaybackTest: ALSA playback test through plughw:PCH successful
  Symptom_Card: Built-in Audio - HDA Intel PCH
  Symptom_Jack: Digital Out, HDMI
  Symptom_PulsePlaybackTest: PulseAudio playback test failed
  Symptom_Type: Only some of outputs are working
  Title: [XPS 13 7390, Intel Kabylake HDMI, Digital Out, HDMI] Playback problem
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 11/25/2019
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: 1.4.0
  dmi.board.name: 0G2D0W
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 10
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: 
dmi:bvnDellInc.:bvr1.4.0:bd11/25/2019:svnDellInc.:pnXPS137390:pvr:rvnDellInc.:rn0G2D0W:rvrA00:cvnDellInc.:ct10:cvr:
  dmi.product.family: XPS
  dmi.product.name: XPS 13 7390
  dmi.product.sku: 0962
  dmi.sys.vendor: Dell Inc.

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