No sound at all (internal speaker - LG AIO)

[Antônio Ayres (LedStyle)]

My internal speaker is not working [ALC282].

When I plug in headphones or external speakers into headphone slot there's no problem.

But when I try to play sounds with my internal speaker, it stay mute.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: alsa-base 1.0.25+dfsg-0ubuntu5
ProcVersionSignature: Ubuntu 4.15.0-22.24-generic 4.15.17
Uname: Linux 4.15.0-22-generic x86_64
ApportVersion: 2.20.9-0ubuntu7
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: antonio 1188 F.... pulseaudio
CurrentDesktop: ubuntu:GNOME
Date: Thu May 31 08:12:41 2018
InstallationDate: Installed on 2018-04-29 (31 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=pt_BR:pt:en
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=pt_BR.UTF-8
 SHELL=/bin/bash
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:PCH failed
Symptom_Card: Áudio interno - HDA Intel PCH
Symptom_DevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: antonio 1188 F.... pulseaudio
Symptom_Jack: Speaker, Internal
Symptom_Type: No sound at all
Title: [24V360-L.BJ57P1, Realtek ALC282, Speaker, Internal] No sound at all
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/25/2016
dmi.bios.vendor: Phoenix Technologies Ltd.
dmi.bios.version: 24VA1440 X64
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: 24V360
dmi.board.vendor: LG Electronics
dmi.board.version: FAB2
dmi.chassis.asset.tag: Asset Tag
dmi.chassis.type: 13
dmi.chassis.vendor: LG Electronics
dmi.chassis.version: 0.1
dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvr24VA1440X64:bd03/25/2016:svnLGElectronics:pn24V360-L.BJ57P1:pvr0.1:rvnLGElectronics:rn24V360:rvrFAB2:cvnLGElectronics:ct13:cvr0.1:
dmi.product.family: Braswell System
dmi.product.name: 24V360-L.BJ57P1
dmi.product.version: 0.1
dmi.sys.vendor: LG Electronics

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.