[HDA-Intel - HDA NVidia, playback] No sound at all

[Larry Jordan]

Hi...my problem is that I am using the nVidia GTX card connected by HDMI cable to a widescreen Samsung monitor that doesn't have speakers. Ubuntu assumes I can use that to play audio. In reality I'm using stereo speakers connected to the "center" output from the rear of the computer. This works fine in windows, but not in Ubuntu 20.04. I've tried several fixes to similar looking issues on line, but still I don't get sound. The only option I have under settings is for the HDMI/DisplayPort 2 - GM107 High Definition audio controller [GE Force 940 MX]. I've tried an old solution by adding hdajackretask and I've tried adjusting volume levels using alsamixer, but those solutions didn't help. Anyone have any other ideas? Thanks in advance.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: alsa-base 1.0.25+dfsg-0ubuntu5
ProcVersionSignature: Ubuntu 5.11.0-34.36~20.04.1-generic 5.11.22
Uname: Linux 5.11.0-34-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia wl
ApportVersion: 2.20.11-0ubuntu27.20
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: larry 11338 F.... pulseaudio
 /dev/snd/controlC2: larry 11338 F.... pulseaudio
 /dev/snd/controlC1: larry 11338 F.... pulseaudio
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Mon Sep 20 23:05:52 2021
PackageArchitecture: all
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:NVidia failed
Symptom_Card: GM107 High Definition Audio Controller [GeForce 940MX] - HDA NVidia
Symptom_Type: No sound at all
Title: [HDA-Intel - HDA NVidia, playback] No sound at all
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 05/31/2019
dmi.bios.release: 64.14
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A14
dmi.board.name: 0KWVT8
dmi.board.vendor: Dell Inc.
dmi.board.version: A03
dmi.chassis.type: 3
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA14:bd05/31/2019:br64.14:svnDellInc.:pnXPS8700:pvr:sku0x05B7:rvnDellInc.:rn0KWVT8:rvrA03:cvnDellInc.:ct3:cvr:
dmi.product.family: To be filled by O.E.M.
dmi.product.name: XPS 8700
dmi.product.sku: 0x05B7
dmi.sys.vendor: Dell Inc.