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

[d]

I found the following:

https://ubuntuforums.org/showthread.php?t=2421187

Based on that I edited

/etc/modprobe.d/alsa-base.conf

and added this to the end of the file:

# Manual entry to allow audio via headphones because NVIDIA drivers break the built-in audio
options snd-hda-intel model=clevo-p950
options snd-hda-intel probe_mask=0x1

with the probe_mask entry the headphones would work again.
with the model entry the speakers also got to work.

For people with other hardware and the same problem you can retrieve the
codec of the system with

$ cat /proc/asound/card0/codec*

And check what model entry you need to use matching your codec in the
following site:

https://www.infradead.org/~mchehab/rst_conversion/sound/hd-
audio/models.html

This is in any case a workaround and it would be best if the update
hadn't broken it.

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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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