Sure. pactl list cards output is identical on success and failure:

$ md5sum pactl-list-cards-*
1b3e54a38e363e16115a0428901f71ed  pactl-list-cards-fail.txt
1b3e54a38e363e16115a0428901f71ed  pactl-list-cards-success.txt


** Attachment added: "pactl-list-cards.txt"
   
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1879401/+attachment/5394624/+files/pactl-list-cards.txt

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https://bugs.launchpad.net/bugs/1879401

Title:
  [XPS 13 7390 2-in-1, Intel Icelake HDMI, Digital Out, HDMI] sound
  rarely works

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  I have an Ice Lake laptop (Dell 7390 2-in-one) which I am connecting
  to a TV over HDMI via a Novoo USB-C multiport adapter. This is not a
  Thunderbolt device, it is just USB-C.

  It seemed like things used to work fine before I upgraded this system
  from Ubuntu 19.10 to 20.04, although I couldn't say for certain at
  this point. But I'm having a ton of difficulty getting audio output
  over HDMI. Getting it to work requires a lot of retries to
  reinitialize the device (either by suspending/resuming the laptop, or
  plugging/unplugging the HDMI cable and/or the multiport adapter). It
  does work sometimes, but my success rate is very low at this point.

  Even when it does work, it's brittle: any change to the output port
  (to speaker and back to HDMI, or from stereo to surround and back)
  will often break the audio. This fact seems to suggest that the
  problem doesn't have anything to do with the low-level initialization
  of the HDMI port; I'd be looking at some mid-layer code.

  To be clear, there doesn't seem to be any particular symptom, or
  anything of interest in the logs, other than an absence of sound
  output.

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: alsa-base 1.0.25+dfsg-0ubuntu5
  ProcVersionSignature: Ubuntu 5.6.0-1010.10-oem 5.6.8
  Uname: Linux 5.6.0-1010-oem x86_64
  ApportVersion: 2.20.11-0ubuntu27
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  nbryant    1510 F.... pulseaudio
   /dev/snd/pcmC0D9p:   nbryant    1510 F...m pulseaudio
  CasperMD5CheckResult: skip
  CurrentDesktop: ubuntu:GNOME
  Date: Mon May 18 17:32:11 2020
  InstallationDate: Installed on 2020-01-31 (108 days ago)
  InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
  PackageArchitecture: all
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: alsa-driver
  Symptom: audio
  Symptom_Card: Built-in Audio - HDA Intel PCH
  Symptom_Jack: Digital Out, HDMI
  Symptom_PulseAudioLog:
   May 18 16:36:42 atlantis dbus-daemon[633]: [system] Activating via systemd: 
service name='org.freedesktop.RealtimeKit1' unit='rtkit-daemon.service' 
requested by ':1.41' (uid=124 pid=1116 comm="/usr/bin/pulseaudio --daemonize=no 
--log-target=jo" label="unconfined")
   May 18 16:36:53 atlantis systemd[1109]: pulseaudio.service: Succeeded.
   May 18 16:37:03 atlantis systemd[1109]: pulseaudio.socket: Succeeded.
  Symptom_Type: Sound works for a while, then breaks
  Title: [XPS 13 7390 2-in-1, Intel Icelake HDMI, Digital Out, HDMI] fails 
after a while
  UpgradeStatus: Upgraded to focal on 2020-04-21 (27 days ago)
  dmi.bios.date: 03/02/2020
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: 1.3.1
  dmi.board.name: 06CDVY
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 31
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: 
dmi:bvnDellInc.:bvr1.3.1:bd03/02/2020:svnDellInc.:pnXPS1373902-in-1:pvr:rvnDellInc.:rn06CDVY:rvrA00:cvnDellInc.:ct31:cvr:
  dmi.product.family: XPS
  dmi.product.name: XPS 13 7390 2-in-1
  dmi.product.sku: 08B0
  dmi.sys.vendor: Dell Inc.
  --- 
  ProblemType: Bug
  ApportVersion: 2.20.11-0ubuntu27
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  nbryant    1510 F.... pulseaudio
  CasperMD5CheckResult: skip
  CurrentDesktop: ubuntu:GNOME
  DistroRelease: Ubuntu 20.04
  InstallationDate: Installed on 2020-01-31 (108 days ago)
  InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
  Lsusb:
   Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 003 Device 003: ID 8087:0026 Intel Corp. 
   Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: Dell Inc. XPS 13 7390 2-in-1
  Package: linux (not installed)
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 i915drmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.6.0-1010-oem 
root=UUID=caffa21a-82f2-4555-a416-67926241525a ro cma=64M 
pcie_aspm.policy=powersupersave drm.vblankoffdelay=1 video=1600x1200 
mem_sleep_default=deep
  ProcVersionSignature: Ubuntu 5.6.0-1010.10-oem 5.6.8
  RelatedPackageVersions:
   linux-restricted-modules-5.6.0-1010-oem N/A
   linux-backports-modules-5.6.0-1010-oem  N/A
   linux-firmware                          1.187
  Tags:  focal
  Uname: Linux 5.6.0-1010-oem x86_64
  UpgradeStatus: Upgraded to focal on 2020-04-21 (27 days ago)
  UserGroups: adm cdrom dip docker lpadmin lxd plugdev sambashare sudo
  _MarkForUpload: True
  dmi.bios.date: 03/02/2020
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: 1.3.1
  dmi.board.name: 06CDVY
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 31
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: 
dmi:bvnDellInc.:bvr1.3.1:bd03/02/2020:svnDellInc.:pnXPS1373902-in-1:pvr:rvnDellInc.:rn06CDVY:rvrA00:cvnDellInc.:ct31:cvr:
  dmi.product.family: XPS
  dmi.product.name: XPS 13 7390 2-in-1
  dmi.product.sku: 08B0
  dmi.sys.vendor: Dell Inc.

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