Public bug reported:

The volume keys of my keyboard not working since the last ubuntu update
release.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: alsa-base 1.0.25+dfsg-0ubuntu5
ProcVersionSignature: Ubuntu 5.4.0-52.57-generic 5.4.65
Uname: Linux 5.4.0-52-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.9
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC2:  lumantar   3208 F.... pulseaudio
 /dev/snd/controlC0:  lumantar   3208 F.... pulseaudio
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Wed Oct 28 10:01:27 2020
InstallationDate: Installed on 2018-09-14 (775 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
PackageArchitecture: all
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=es_CO.UTF-8
 SHELL=/bin/bash
SourcePackage: alsa-driver
Symptom: audio
Symptom_Card: Audio Interno - HDA Intel PCH
Symptom_Jack: Speaker, Internal
Symptom_PulseAudioLog:
 oct 28 09:15:18 lumantar dbus-daemon[776]: [system] Activating via systemd: 
service name='org.freedesktop.RealtimeKit1' unit='rtkit-daemon.service' 
requested by ':1.37' (uid=120 pid=1243 comm="/usr/bin/pulseaudio --daemonize=no 
--log-target=jo" label="unconfined")
 oct 28 09:15:23 lumantar pulseaudio[1243]: No UCM verb is valid for hw:0
 oct 28 09:15:26 lumantar pulseaudio[1243]: No UCM verb is valid for hw:2
 oct 28 09:19:41 lumantar systemd[1199]: pulseaudio.service: Succeeded.
 oct 28 09:19:51 lumantar systemd[1199]: pulseaudio.socket: Succeeded.
Symptom_Type: Volume slider, or mixer problems
Title: [20354, Conexant CX20751/2, Speaker, Internal] volume slider problem
UpgradeStatus: Upgraded to focal on 2020-10-21 (7 days ago)
dmi.bios.date: 04/20/2015
dmi.bios.vendor: LENOVO
dmi.bios.version: 9BCN31WW
dmi.board.asset.tag: No Asset Tag
dmi.board.name: Lancer 5A5
dmi.board.vendor: LENOVO
dmi.board.version: 31900059WIN
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Lenovo Z50-70
dmi.modalias: 
dmi:bvnLENOVO:bvr9BCN31WW:bd04/20/2015:svnLENOVO:pn20354:pvrLenovoZ50-70:rvnLENOVO:rnLancer5A5:rvr31900059WIN:cvnLENOVO:ct10:cvrLenovoZ50-70:
dmi.product.family: IDEAPAD
dmi.product.name: 20354
dmi.product.sku: LENOVO_MT_20354_BU_idea_FM_Lenovo Z50-70
dmi.product.version: Lenovo Z50-70
dmi.sys.vendor: LENOVO

** Affects: alsa-driver (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug focal

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https://bugs.launchpad.net/bugs/1901908

Title:
  [20354, Conexant CX20751/2, Speaker, Internal] volume slider problem

Status in alsa-driver package in Ubuntu:
  New

Bug description:
  The volume keys of my keyboard not working since the last ubuntu
  update release.

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: alsa-base 1.0.25+dfsg-0ubuntu5
  ProcVersionSignature: Ubuntu 5.4.0-52.57-generic 5.4.65
  Uname: Linux 5.4.0-52-generic x86_64
  ApportVersion: 2.20.11-0ubuntu27.9
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC2:  lumantar   3208 F.... pulseaudio
   /dev/snd/controlC0:  lumantar   3208 F.... pulseaudio
  CasperMD5CheckResult: skip
  CurrentDesktop: ubuntu:GNOME
  Date: Wed Oct 28 10:01:27 2020
  InstallationDate: Installed on 2018-09-14 (775 days ago)
  InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
  PackageArchitecture: all
  ProcEnviron:
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=es_CO.UTF-8
   SHELL=/bin/bash
  SourcePackage: alsa-driver
  Symptom: audio
  Symptom_Card: Audio Interno - HDA Intel PCH
  Symptom_Jack: Speaker, Internal
  Symptom_PulseAudioLog:
   oct 28 09:15:18 lumantar dbus-daemon[776]: [system] Activating via systemd: 
service name='org.freedesktop.RealtimeKit1' unit='rtkit-daemon.service' 
requested by ':1.37' (uid=120 pid=1243 comm="/usr/bin/pulseaudio --daemonize=no 
--log-target=jo" label="unconfined")
   oct 28 09:15:23 lumantar pulseaudio[1243]: No UCM verb is valid for hw:0
   oct 28 09:15:26 lumantar pulseaudio[1243]: No UCM verb is valid for hw:2
   oct 28 09:19:41 lumantar systemd[1199]: pulseaudio.service: Succeeded.
   oct 28 09:19:51 lumantar systemd[1199]: pulseaudio.socket: Succeeded.
  Symptom_Type: Volume slider, or mixer problems
  Title: [20354, Conexant CX20751/2, Speaker, Internal] volume slider problem
  UpgradeStatus: Upgraded to focal on 2020-10-21 (7 days ago)
  dmi.bios.date: 04/20/2015
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 9BCN31WW
  dmi.board.asset.tag: No Asset Tag
  dmi.board.name: Lancer 5A5
  dmi.board.vendor: LENOVO
  dmi.board.version: 31900059WIN
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Lenovo Z50-70
  dmi.modalias: 
dmi:bvnLENOVO:bvr9BCN31WW:bd04/20/2015:svnLENOVO:pn20354:pvrLenovoZ50-70:rvnLENOVO:rnLancer5A5:rvr31900059WIN:cvnLENOVO:ct10:cvrLenovoZ50-70:
  dmi.product.family: IDEAPAD
  dmi.product.name: 20354
  dmi.product.sku: LENOVO_MT_20354_BU_idea_FM_Lenovo Z50-70
  dmi.product.version: Lenovo Z50-70
  dmi.sys.vendor: LENOVO

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