[Built-in Audio - HD-Audio Generic, playback] Playback problem

[Marshall Masters]

I can hear the right speaker when I use headphones, but not from the built-in speakers on my laptop. System sees the sound card.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: alsa-base 1.0.25+dfsg-0ubuntu5
ProcVersionSignature: Ubuntu 4.4.0-75.96-generic 4.4.59
Uname: Linux 4.4.0-75-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.5
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: marshall 2187 F.... pulseaudio
 /dev/snd/controlC2: marshall 2187 F.... pulseaudio
 /dev/snd/controlC0: marshall 2187 F.... pulseaudio
CurrentDesktop: Unity
Date: Sun May 7 21:49:19 2017
InstallationDate: Installed on 2013-07-25 (1382 days ago)
InstallationMedia: Ubuntu 12.04.2 LTS "Precise Pangolin" - Release amd64 (20130213)
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_US
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: alsa-driver
Symptom: audio
Symptom_Card: Q1U dynamic microphone - AT2020 USB
Symptom_Type: Only some of outputs are working
Title: [Built-in Audio - HD-Audio Generic, playback] Playback problem
UpgradeStatus: Upgraded to xenial on 2016-07-31 (281 days ago)
dmi.bios.date: 12/09/2010
dmi.bios.vendor: Acer
dmi.bios.version: V1.02
dmi.board.name: Aspire 5253
dmi.board.vendor: Acer
dmi.board.version: V1.02
dmi.chassis.type: 10
dmi.chassis.vendor: Chassis Manufacturer
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnAcer:bvrV1.02:bd12/09/2010:svnAcer:pnAspire5253:pvrV1.02:rvnAcer:rnAspire5253:rvrV1.02:cvnChassisManufacturer:ct10:cvrChassisVersion:
dmi.product.name: Aspire 5253
dmi.product.version: V1.02
dmi.sys.vendor: Acer