[HDA-Intel in Dell XPS 13 9333] No sound at all

[Francis Cañete]

ubuntu 16.04 LTS
ubuntu software 3.20.1

I've passed the hardware test provided by Dell and there is sound. In the past, with older releases of ubuntu (probably with 12.04 LTS and even at the beginning of 14.04 LTS), I had sound.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: alsa-base 1.0.25+dfsg-0ubuntu5
ProcVersionSignature: Ubuntu 4.4.0-28.47-generic 4.4.13
Uname: Linux 4.4.0-28-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: francis 1557 F.... pulseaudio
CurrentDesktop: Unity
Date: Sun Jul 10 19:45:31 2016
InstallationDate: Installed on 2016-06-24 (15 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
PackageArchitecture: all
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:HDMI failed
Symptom_Card: Audio Interno - HDA Intel HDMI
Symptom_DevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: francis 1557 F.... pulseaudio
Symptom_Type: No sound at all
Title: [HDA-Intel - HDA Intel HDMI, playback] No sound at all
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/31/2015
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A08
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: 0.1
dmi.modalias: dmi:bvnDellInc.:bvrA08:bd08/31/2015:svnDellInc.:pnXPS139333:pvr:rvnDellInc.:rn:rvr:cvnDellInc.:ct8:cvr0.1:
dmi.product.name: XPS13 9333
dmi.sys.vendor: Dell Inc.
mtime.conffile..etc.modprobe.d.alsa-base.conf: 2016-07-10T19:35:23.328749