[37722QP, Realtek ALC269VC, Black Headphone Out, Left] audio balance slider problem

[Gabriel Longo]

Sound works normally on the standard speakers, but when I put on the headphone I notice that only the left side emits sound, so I go to the settings and notice that the audio balance slider is well to the left, I set it to The center and everything goes on working normally.

In many cases I also notice that the sound is only emitted on the left side, even though the slider is centered, so again in this case I take the slider and move it out of the center and then center it again, and the sound is properly balanced normally.

I already checked if it was the plugs and jacks, and they are perfect, otherwise I would not be able to get around the problem by changing the "slider"

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: alsa-base 1.0.25+dfsg-0ubuntu5
ProcVersionSignature: Ubuntu 4.4.0-72.93-generic 4.4.49
Uname: Linux 4.4.0-72-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.20.1-0ubuntu2.5
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/pcmC0D0p: titan 2299 F...m pulseaudio
 /dev/snd/controlC0: titan 2299 F.... pulseaudio
CurrentDesktop: GNOME
Date: Sat Apr 15 23:30:18 2017
InstallationDate: Installed on 2017-01-28 (77 days ago)
InstallationMedia: Ubuntu-GNOME 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160720)
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_Card: Áudio interno - HDA Intel PCH
Symptom_Jack: Black Headphone Out, Left
Symptom_Type: Volume slider, or mixer problems
Title: [37722QP, Realtek ALC269VC, Black Headphone Out, Left] volume slider problem
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 11/21/2013
dmi.bios.vendor: LENOVO
dmi.bios.version: H1ET82BX(1.21)
dmi.board.asset.tag: Not Available
dmi.board.name: 37722QP
dmi.board.vendor: LENOVO
dmi.board.version: Win8 STD EM DPK TPG
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvrH1ET82BX(1.21):bd11/21/2013:svnLENOVO:pn37722QP:pvrLenovoB490:rvnLENOVO:rn37722QP:rvrWin8STDEMDPKTPG:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 37722QP
dmi.product.version: Lenovo B490
dmi.sys.vendor: LENOVO