[broadwell-rt286 - broadwell-rt286, playback] No sound at all

[Nathanael HATEGEKIMANA]

No sound at all in both speakers after installing Ubuntu 14.04. I tried all guesses but none seem to work. Any help please?

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: alsa-base 1.0.25+dfsg-0ubuntu4
ProcVersionSignature: Ubuntu 4.4.0-36.55~14.04.1-generic 4.4.16
Uname: Linux 4.4.0-36-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.25
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: nathanael 14755 F.... pulseaudio
 /dev/snd/controlC0: nathanael 14755 F.... pulseaudio
CurrentDesktop: Unity
Date: Wed Aug 2 12:06:21 2017
InstallationDate: Installed on 2017-08-01 (0 days ago)
InstallationMedia: AIMS Desktop 14.04.5-20160907 0.01 "" - Release amd64 (20160907)
PackageArchitecture: all
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:broadwellrt286 failed
Symptom_Card: broadwell-rt286 - broadwell-rt286
Symptom_DevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: nathanael 14755 F.... pulseaudio
 /dev/snd/controlC0: nathanael 14755 F.... pulseaudio
Symptom_Type: No sound at all
Title: [broadwell-rt286 - broadwell-rt286, playback] No sound at all
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/28/2016
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: F.43
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: 802D
dmi.board.vendor: Hewlett-Packard
dmi.board.version: 58.62
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrF.43:bd09/28/2016:svnHewlett-Packard:pnHPSpectreProx360G1:pvr:rvnHewlett-Packard:rn802D:rvr58.62:cvnHewlett-Packard:ct10:cvrChassisVersion:
dmi.product.name: HP Spectre Pro x360 G1
dmi.sys.vendor: Hewlett-Packard