[Bug 1898184] Re: Kubuntu 20.04.1 (Lenovo P50): Built-in audio not found after release upgrade

[estolle]

** Summary changed:

- Kubuntu 20.04.1 (Lenovo P50): Internal microphone not found after release upgrade
+ Kubuntu 20.04.1 (Lenovo P50): Built-in audio not found after release upgrade

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Title:
  Kubuntu 20.04.1 (Lenovo P50): Built-in audio not found after release
  upgrade

Status in ubiquity package in Ubuntu:
  New

Bug description:
  After having had a smoothly running Kubuntu 18.04.5 I migrated to
  Kubuntu 20.04.1 just three days ago. Today I wanted to start a Zoom
  web meetingwhen Zoom reported that it could not find my internal
  microphone.  This was the first time I was trying to use the
  microphone after the release upgrade. The system settings reports the
  same ("no recording devices available").

  The system settings provides interesting information. As my laptop is
  equipped with Nvidia QuadroM1000M, I was able to choose between
  different combinations of input and output profiles in system settings
  - Audio - Advanced.

  However, now there are only profiles available which are related to
  the audio controller onboard the Nvidia chipset. The others are
  missing (Stereo input, Mono input, Stereo output etc.).

  But I still can start a Zoom meeting and can hear and see everything.
  This is due to the fact that the output is using the audio chipset of
  the Nvidia Quadro.

  Using an external webcam (Logitech Webcam Pro 9000 Mono) I am able to
  transmit a Mickey Mouse type of sound. This webcam worked well before
  the release upgrade.

  Last but not least, I tried using a bluetooth headset which I am able
  to connect flawlessly but it won't help either.

  I found a similar bug in 
  https://askubuntu.com/questions/1230283/internal-micrphone-is-not-working-in-ubuntu-20-04 

  so I tried the proposed

  pulseaudio -k && sudo alsa force-reload

  but it won't work. So I believe there is something wrong with the
  kernel.

  
  Output of inxi -Fxxxz

  System:    Kernel: 5.4.0-48-generic x86_64 bits: 64 compiler: gcc v:
  9.3.0 Desktop: KDE Plasma 5.18.5 tk: Qt 5.12.8 wm: kwin_x11 dm: SDDM
  Distro: Ubuntu 20.04.1 LTS (Focal Fossa)

  Machine:   Type: Laptop System: LENOVO product: 20EN0005GE v: ThinkPad
  P50 serial: <filter> Chassis: type: 10 serial: <filter> Mobo: LENOVO
  model: 20EN0005GE serial: <filter> UEFI: LENOVO v: N1EET86W (1.59 )
  date: 08/28/2019

  Audio:     
  Device-1: Intel 100 Series/C230 Series Family HD Audio vendor: Lenovo driver: snd_hda_intel v: kernel bus ID: 00:1f.3 chip ID: 8086:a170 
  Device-2: NVIDIA GM107 High Definition Audio [GeForce 940MX] driver: snd_hda_intel v: kernel bus ID: 01:00.1 
  chip ID: 10de:0fbc 
  Sound Server: ALSA v: k5.4.0-48-generic 

  ***
  Output of dmesg | grep snd

  [    4.678462] snd_hda_intel 0000:01:00.1: enabling device (0000 -> 0002)
  [    4.678530] snd_hda_intel 0000:01:00.1: Disabling MSI
  [    4.678535] snd_hda_intel 0000:01:00.1: Handle vga_switcheroo audio client
  [    4.711131] snd_hda_codec_realtek hdaudioC0D0: autoconfig for ALC298: line_outs=1 (0x14/0x0/0x0/0x0/0x0) type:speaker
  [    4.711133] snd_hda_codec_realtek hdaudioC0D0:    speaker_outs=0 (0x0/0x0/0x0/0x0/0x0)
  [    4.711134] snd_hda_codec_realtek hdaudioC0D0:    hp_outs=2 (0x17/0x21/0x0/0x0/0x0)
  [    4.711135] snd_hda_codec_realtek hdaudioC0D0:    mono: mono_out=0x0
  [    4.711135] snd_hda_codec_realtek hdaudioC0D0:    inputs:
  [    4.711136] snd_hda_codec_realtek hdaudioC0D0:      Mic=0x18
  [    4.711137] snd_hda_codec_realtek hdaudioC0D0:      Dock Mic=0x19
  [    4.711138] snd_hda_codec_realtek hdaudioC0D0:      Internal Mic=0x12
  [   19.795557] snd_hda_codec_hdmi hdaudioC1D0: HDMI: invalid ELD data byte 61
  [ 5114.913448] usbcore: registered new interface driver snd-usb-audio

  
  Just for sake of completeness the inxi output
  Graphics:  
  Device-1: NVIDIA GM107GLM [Quadro M1000M] vendor: Lenovo driver: nvidia v: 450.66 bus ID: 01:00.0 chip ID: 10de:13b1 
  Display: x11 server: X.Org 1.20.8 driver: nvidia unloaded: fbdev,modesetting,nouveau,vesa compositor: kwin_x11 resolution: 2560x1440~60Hz, 1920x1080~60Hz 
  OpenGL: renderer: Quadro M1000M/PCIe/SSE2 v: 4.6.0 NVIDIA 450.66 direct render: Yes

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: ubiquity (not installed)
  ProcVersionSignature: Ubuntu 5.4.0-48.52-generic 5.4.60
  Uname: Linux 5.4.0-48-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.11-0ubuntu27.9
  Architecture: amd64
  CasperMD5CheckResult: skip
  CurrentDesktop: KDE
  Date: Fri Oct  2 13:02:31 2020
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/kubuntu.seed boot=casper maybe-ubiquity quiet splash ---
  InstallationDate: Installed on 2019-06-07 (483 days ago)
  InstallationMedia: Kubuntu 18.04.2 LTS "Bionic Beaver" - Release amd64 (20190210)
  SourcePackage: ubiquity
  Symptom: installer
  UpgradeStatus: Upgraded to focal on 2020-09-29 (2 days ago)

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