[Inspiron 15-3567, Realtek ALC3246, Black Headphone Out, Front] No sound at all from Ear phones.

I was having trouble getting any audio into my Ear phones. It happened only today. It was working till yesterday. I have tried command in terminal "alsactl restore" when I faced similar problem before. But now this didn't work. Please help me.
Thanks.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: alsa-base 1.0.25+dfsg-0ubuntu5
ProcVersionSignature: Ubuntu 4.15.0-34.37-generic 4.15.18
Uname: Linux 4.15.0-34-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: sashi 4207 F.... pulseaudio
CurrentDesktop: ubuntu:GNOME
Date: Mon Sep 24 12:30:47 2018
InstallationDate: Installed on 2018-05-08 (138 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=en_IN
 SHELL=/bin/bash
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:PCH failed
Symptom_Card: Built-in Audio - HDA Intel PCH
Symptom_DevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: gdm 1648 F.... pulseaudio
                      sashi 4207 F.... pulseaudio
Symptom_Jack: Black Headphone Out, Front
Symptom_Type: No sound at all
Title: [Inspiron 15-3567, Realtek ALC3246, Black Headphone Out, Front] No sound at all
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 06/05/2017
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 01.08.00
dmi.board.name: 05269N
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 9
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvr01.08.00:bd06/05/2017:svnDellInc.:pnInspiron15-3567:pvr:rvnDellInc.:rn05269N:rvrA00:cvnDellInc.:ct9:cvr:
dmi.product.family: Inspiron
dmi.product.name: Inspiron 15-3567
dmi.sys.vendor: Dell Inc.