briefly tested (work) patch that manually reversed commit
72cd3810e52c606595f9e1a2d442a4cc6e6a3551 applied on HEAD of master on
git://git.launchpad.net/~ubuntu-kernel-
test/ubuntu/+source/linux/+git/mainline-crack

** Patch added: "let's use HDMI audio even if not eld_valid"
   
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1993217/+attachment/5625619/+files/patch_hdmi_fix1.patch

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https://bugs.launchpad.net/bugs/1993217

Title:
  old commit make HDMI audio not available if not eld_valid

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  This is on my friend laptop with his TV.
  HDMI audio not available in pavucontrol (profile say unplugged, unavailable) 
in kernel versions with bugs.
  It is just shown as an audio output (HDMI audio) on kernels where it is 
working.
  When not working, I can play with aplay -D HDMI ... 
  When working... I select HDMI audio in output, and test sound ok, Youtube 
videos ok, etc.

  4.9.177 working.
  4.9.178 not working.

  I suspect commit 72cf0b07418a9c8349aa9137194b1ccba6e54a9d because it
  is between those versions, and is related to audio (realtek in part).

  More info at:
  https://forums.linuxmint.com/viewtopic.php?f=49&t=383607&p=2246352#p2246352
  although the laptop now runs ... 17.10 I think (a version with a not broken 
kernel).
  --- 
  ProblemType: Bug
  ApportVersion: 2.20.11-0ubuntu82.1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  client     1023 F.... pulseaudio
   /dev/snd/pcmC0D0p:   client     1023 F...m pulseaudio
   /dev/snd/controlC1:  client     1023 F.... pulseaudio
  CasperMD5json: {
  DistroRelease: Linux Mint 21
  InstallationDate: Installed on 2022-10-18 (0 days ago)
  InstallationMedia: Linux Mint 21 "Vanessa" - Release amd64 20220726
  MachineType: SAMSUNG ELECTRONICS CO., LTD. R425D/R525D
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  Package: linux (not installed)
  ProcEnviron:
   LANGUAGE=fr_CA:fr
   TERM=xterm-256color
   PATH=(custom, no user)
   LANG=fr_CA.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.15.0-50-generic 
root=UUID=2db14083-ebb6-4a5a-b0b1-4a65e79069d7 ro quiet splash
  ProcVersionSignature: Ubuntu 5.15.0-50.56-generic 5.15.60
  PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No 
PulseAudio daemon running, or not running as session daemon.
  RelatedPackageVersions:
   linux-restricted-modules-5.15.0-50-generic N/A
   linux-backports-modules-5.15.0-50-generic  N/A
   linux-firmware                             20220329.git681281e4-0ubuntu3.5
  Tags:  vanessa apport-hook-error
  Uname: Linux 5.15.0-50-generic x86_64
  UnreportableReason: Ce rapport concerne un paquet qui n'est pas installé.
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: N/A
  _MarkForUpload: False
  dmi.bios.date: 10/16/2010
  dmi.bios.release: 2.0
  dmi.bios.vendor: Phoenix Technologies Ltd.
  dmi.bios.version: 02UF
  dmi.board.name: R425D/R525D
  dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD.
  dmi.board.version: Not Applicable
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD.
  dmi.chassis.version: N/A
  dmi.modalias: 
dmi:bvnPhoenixTechnologiesLtd.:bvr02UF:bd10/16/2010:br2.0:svnSAMSUNGELECTRONICSCO.,LTD.:pnR425D/R525D:pvrNotApplicable:rvnSAMSUNGELECTRONICSCO.,LTD.:rnR425D/R525D:rvrNotApplicable:cvnSAMSUNGELECTRONICSCO.,LTD.:ct10:cvrN/A:sku:
  dmi.product.name: R425D/R525D
  dmi.product.version: Not Applicable
  dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD.

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