Public bug reported:

Sound volume is low and I can only hear the right side.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: alsa-base 1.0.25+dfsg-0ubuntu5
ProcVersionSignature: Ubuntu 4.4.0-78.99-generic 4.4.62
Uname: Linux 4.4.0-78-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia
ApportVersion: 2.20.1-0ubuntu2.6
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC1:  lfi        1985 F.... pulseaudio
 /dev/snd/controlC0:  lfi        1985 F.... pulseaudio
CurrentDesktop: Unity
Date: Fri Jun 23 16:26:41 2017
InstallationDate: Installed on 2016-10-22 (244 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
PackageArchitecture: all
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:SB failed
Symptom_Card: Built-in Audio - HDA ATI SB
Symptom_Jack: Green Line Out, Rear
Symptom_Type: None of the above
Title: [GA-78LMT-USB3, Realtek ALC887-VD, Green Line Out, Rear] Playback problem
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/10/2012
dmi.bios.vendor: Award Software International, Inc.
dmi.bios.version: F2
dmi.board.name: GA-78LMT-USB3
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: x.x
dmi.chassis.type: 3
dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
dmi.modalias: 
dmi:bvnAwardSoftwareInternational,Inc.:bvrF2:bd08/10/2012:svnGigabyteTechnologyCo.,Ltd.:pnGA-78LMT-USB3:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnGA-78LMT-USB3:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr:
dmi.product.name: GA-78LMT-USB3
dmi.sys.vendor: Gigabyte Technology Co., Ltd.

** Affects: alsa-driver (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug xenial

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https://bugs.launchpad.net/bugs/1700182

Title:
  [GA-78LMT-USB3, Realtek ALC887-VD, Green Line Out, Rear] Playback
  problem

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