PCI/internal sound card not detected

[Mangala Dep]

1) the release of Ubunutu - Description:Ubuntu 16.04.4 LTS Release: 16.04
2) Unable to locate package pkgname

I have a HP laptop i3 7th gen. when i first installed Ubunutu 16.04 sounds worked like a charm. then recently sound was so bad i couldn't hear even with maximum volume. an today it won't work at all. pulseaudio shows dummy output. But when i connect my bluetooth speaker sound works.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: alsa-base 1.0.25+dfsg-0ubuntu5
ProcVersionSignature: Ubuntu 4.4.0-130.156-generic 4.4.134
Uname: Linux 4.4.0-130-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.18
Architecture: amd64
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
CurrentDesktop: Unity
Date: Wed Jul 18 12:46:44 2018
InstallationDate: Installed on 2017-03-06 (498 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
PackageArchitecture: all
SourcePackage: alsa-driver
Symptom: audio
Title: PCI/internal sound card not detected
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/27/2016
dmi.bios.vendor: Insyde
dmi.bios.version: F.21
dmi.board.asset.tag: Type2 - Board Asset Tag
dmi.board.name: 81ED
dmi.board.vendor: HP
dmi.board.version: 62.36
dmi.chassis.type: 10
dmi.chassis.vendor: HP
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnInsyde:bvrF.21:bd10/27/2016:svnHP:pnHPNotebook:pvrType1ProductConfigId:rvnHP:rn81ED:rvr62.36:cvnHP:ct10:cvrChassisVersion:
dmi.product.name: HP Notebook
dmi.product.version: Type1ProductConfigId
dmi.sys.vendor: HP