[Bug 1876499] Re: Using NVIDIA drivers 440 (tested) disables built-in laptop speakers

[d]

The issue I am having seems similar to this:
https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1833161

It is definitely an issue after the NVIDIA driver installation.
Headphones and built-in speakers stop working. Only the HDMI audio
works. There was a small kernel update from 5.4.0-26-generic to
5.4.0-28-generic last night so I will try to see if that makes any
difference.

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https://bugs.launchpad.net/bugs/1876499

Title:
  Using NVIDIA drivers 440 (tested) disables built-in laptop speakers

Status in ubiquity package in Ubuntu:
  New

Bug description:
  I have an external HDMI monitor attached to my laptop and the nouveau
  drivers would detect it but I would only get a black screen and no
  display beside the cursor.

  Using the NVIDIA drivers makes the external monitor work but it then
  disables the built-in audio and tries to send all audio via HDMI. Even
  the headphones will stop working.

  If I rollback with the zsys backup everything works again. Manually
  reverting to nouveau doesn't bring the audio back.

  Operating System: Kubuntu 20.04
  KDE Plasma Version: 5.18.4
  KDE Frameworks Version: 5.68.0
  Qt Version: 5.12.8
  Kernel Version: 5.4.0-26-generic
  OS Type: 64-bit
  Processors: 12 × Intel® Core™ i7-9750H CPU @ 2.60GHz
  Memory: 31.1 GiB of RAM

  # apt-cache policy nvidia-driver-430
  nvidia-driver-430:
    Installed: (none)
    Candidate: 440.82+really.440.64-0ubuntu6
    Version table:
       440.82+really.440.64-0ubuntu6 500
          500 http://gb.archive.ubuntu.com/ubuntu focal/restricted amd64 Packages

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: ubiquity (not installed)
  ProcVersionSignature: Ubuntu 5.4.0-26.30-generic 5.4.30
  Uname: Linux 5.4.0-26-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair nvidia_modeset nvidia
  ApportVersion: 2.20.11-0ubuntu27
  Architecture: amd64
  CasperMD5CheckResult: skip
  CurrentDesktop: KDE
  Date: Sat May  2 18:46:38 2020
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed maybe-ubiquity quiet splash ---
  InstallationDate: Installed on 2020-05-02 (0 days ago)
  InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
  ProcEnviron:
   LANGUAGE=en_GB:en
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_GB.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubiquity
  Symptom: installer
  UpgradeStatus: No upgrade log present (probably fresh install)

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