[GA-880GM-UD2H, Nvidia GPU 10 HDMI/DP, Digital Out, HDMI] No sound at all

Hi !

I did an update, upgrade from 14.04 LTS to 16.04 LTS... And from this I don't have sound no more...
It has happen yet before, but I don't konw why...
I had to reinstall the system completly, but now I don't want...

So, is there a solution to get the sound back please ?

Thank you

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: alsa-base 1.0.25+dfsg-0ubuntu5
ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
Uname: Linux 4.4.0-21-generic x86_64
ApportVersion: 2.20.1-0ubuntu2
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: fuji 1559 F.... pulseaudio
 /dev/snd/controlC0: fuji 1559 F.... pulseaudio
CurrentDesktop: Unity
Date: Sun Apr 24 12:20:29 2016
InstallationDate: Installed on 2016-03-22 (33 days ago)
InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=fr_FR
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:NVidia failed
Symptom_Card: GF100 High Definition Audio Controller - HDA NVidia
Symptom_DevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: fuji 1559 F.... pulseaudio
 /dev/snd/controlC0: fuji 1559 F.... pulseaudio
Symptom_Jack: Digital Out, HDMI
Symptom_Type: No sound at all
Title: [GA-880GM-UD2H, Nvidia GPU 10 HDMI/DP, Digital Out, HDMI] No sound at all
UpgradeStatus: Upgraded to xenial on 2016-04-24 (0 days ago)
dmi.bios.date: 04/16/2010
dmi.bios.vendor: Award Software International, Inc.
dmi.bios.version: F5
dmi.board.name: GA-880GM-UD2H
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.chassis.type: 3
dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrF5:bd04/16/2010:svnGigabyteTechnologyCo.,Ltd.:pnGA-880GM-UD2H:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnGA-880GM-UD2H:rvr:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr:
dmi.product.name: GA-880GM-UD2H
dmi.sys.vendor: Gigabyte Technology Co., Ltd.