5.1 audio does not work properly [To Be Filled By O.E.M., Nvidia GPU 84 HDMI/DP, Digital Out, HDMI] Playback problem

[Lando]

Hello,

I am using Ubuntu 19.10 with 5.1 surround speakers.
I tried to configure 5.1 surround, but it still doesn't work.
I also installed Pulse audio.
Here is the info about my soundcard:
# aplay -l
**** Lista PLAYBACK de dispozitive ****
placa 0: PCH [HDA Intel PCH], dispozitiv 0: ALC892 Analog [ALC892 Analog]
  subdispozitive: 0/1
  Subdispozitiv #0: subdevice #0
placa 1: NVidia [HDA NVidia], dispozitiv 3: HDMI 0 [HDMI 0]
  subdispozitive: 1/1
  Subdispozitiv #0: subdevice #0
placa 1: NVidia [HDA NVidia], dispozitiv 7: HDMI 1 [HDMI 1]
  subdispozitive: 1/1
  Subdispozitiv #0: subdevice #0
placa 1: NVidia [HDA NVidia], dispozitiv 8: HDMI 2 [HDMI 2]
  subdispozitive: 1/1
  Subdispozitiv #0: subdevice #0
placa 1: NVidia [HDA NVidia], dispozitiv 9: HDMI 3 [HDMI 3]
  subdispozitive: 1/1
  Subdispozitiv #0: subdevice #0

See 'lscpi -v' output attached.

$ speaker-test -c6 -l1 -twav

speaker-test 1.1.9

Playback device is default
Stream parameters are 48000Hz, S16_LE, 6 channels
WAV file(s)
Rate set to 48000Hz (requested 48000Hz)
Buffer size range from 32 to 349525
Period size range from 10 to 116509
Using max buffer size 349524
Periods = 4
was set period_size = 87381
was set buffer_size = 349524
 0 - Față stânga
 4 - Centru
 1 - Față dreapta
 3 - Spate dreapta
 2 - Spate stânga
 5 - LFE
Timp per Perioada = 8,733519

I tried the test below and instead of center speaker, right speaker plays two times and the subwoofer do not work at all.

Please let me know what other details you need.

Thank you!

ProblemType: Bug
DistroRelease: Ubuntu 19.10
Package: alsa-base 1.0.25+dfsg-0ubuntu5
ProcVersionSignature: Ubuntu 5.3.0-46.38-generic 5.3.18
Uname: Linux 5.3.0-46-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu8.8
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: lucian 1257 F.... pulseaudio
 /dev/snd/controlC0: lucian 1257 F.... pulseaudio
 /dev/snd/pcmC0D0p: lucian 1257 F...m pulseaudio
CurrentDesktop: ubuntu:GNOME
Date: Tue Apr 14 16:46:45 2020
InstallationDate: Installed on 2019-03-30 (380 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
PackageArchitecture: all
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=ro_RO.UTF-8
 SHELL=/bin/bash
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:NVidia failed
Symptom_Card: GP106 High Definition Audio Controller - HDA NVidia
Symptom_Jack: Digital Out, HDMI
Symptom_Type: Only some of outputs are working
Title: [To Be Filled By O.E.M., Nvidia GPU 84 HDMI/DP, Digital Out, HDMI] Playback problem
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 11/21/2016
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: P7.30
dmi.board.name: B150 Pro4/3.1
dmi.board.vendor: ASRock
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP7.30:bd11/21/2016:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnB150Pro4/3.1:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.family: To Be Filled By O.E.M.
dmi.product.name: To Be Filled By O.E.M.
dmi.product.sku: To Be Filled By O.E.M.
dmi.product.version: To Be Filled By O.E.M.
dmi.sys.vendor: To Be Filled By O.E.M.
mtime.conffile..etc.modprobe.d.alsa-base.conf: 2020-03-17T14:42:34.178435