Public bug reported:

Some two hours ago, I listened to audio through the extenal monitor,
also used as display. Then I upgraded to 20_04 from 18_04. Now the
display still works, but pulseaudio doesn't see nor offer the HDMI sink
any longer on my lenovo T410s.

What a bad mishap ... . And what to do now?

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: pulseaudio 1:13.99.1-1ubuntu3.8
ProcVersionSignature: Ubuntu 5.4.0-58.64-generic 5.4.73
Uname: Linux 5.4.0-58-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.14
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  udippel    1690 F.... pulseaudio
 /dev/snd/pcmC0D0p:   udippel    1690 F...m pulseaudio
CasperMD5CheckResult: skip
CurrentDesktop: KDE
Date: Fri Dec 18 22:35:06 2020
InstallationDate: Installed on 2018-08-30 (841 days ago)
InstallationMedia: Lubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
SourcePackage: pulseaudio
UpgradeStatus: Upgraded to focal on 2020-12-18 (0 days ago)
dmi.bios.date: 10/11/2012
dmi.bios.vendor: LENOVO
dmi.bios.version: 6UET70WW (1.50 )
dmi.board.name: 2924WZ6
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: 
dmi:bvnLENOVO:bvr6UET70WW(1.50):bd10/11/2012:svnLENOVO:pn2924WZ6:pvrThinkPadT410s:rvnLENOVO:rn2924WZ6:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.family: ThinkPad T410s
dmi.product.name: 2924WZ6
dmi.product.version: ThinkPad T410s
dmi.sys.vendor: LENOVO

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


** Tags: amd64 apport-bug focal

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https://bugs.launchpad.net/bugs/1908758

Title:
  no more HDMI devices after upgrade to 20_04

Status in pulseaudio package in Ubuntu:
  New

Bug description:
  Some two hours ago, I listened to audio through the extenal monitor,
  also used as display. Then I upgraded to 20_04 from 18_04. Now the
  display still works, but pulseaudio doesn't see nor offer the HDMI
  sink any longer on my lenovo T410s.

  What a bad mishap ... . And what to do now?

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: pulseaudio 1:13.99.1-1ubuntu3.8
  ProcVersionSignature: Ubuntu 5.4.0-58.64-generic 5.4.73
  Uname: Linux 5.4.0-58-generic x86_64
  ApportVersion: 2.20.11-0ubuntu27.14
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  udippel    1690 F.... pulseaudio
   /dev/snd/pcmC0D0p:   udippel    1690 F...m pulseaudio
  CasperMD5CheckResult: skip
  CurrentDesktop: KDE
  Date: Fri Dec 18 22:35:06 2020
  InstallationDate: Installed on 2018-08-30 (841 days ago)
  InstallationMedia: Lubuntu 18.04 LTS "Bionic Beaver" - Release amd64 
(20180426)
  SourcePackage: pulseaudio
  UpgradeStatus: Upgraded to focal on 2020-12-18 (0 days ago)
  dmi.bios.date: 10/11/2012
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 6UET70WW (1.50 )
  dmi.board.name: 2924WZ6
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Available
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: 
dmi:bvnLENOVO:bvr6UET70WW(1.50):bd10/11/2012:svnLENOVO:pn2924WZ6:pvrThinkPadT410s:rvnLENOVO:rn2924WZ6:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.family: ThinkPad T410s
  dmi.product.name: 2924WZ6
  dmi.product.version: ThinkPad T410s
  dmi.sys.vendor: LENOVO

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