No sound from integrated speakers on Inspiron 7537, Realtek ALC3223

[Francesco Pontillo]

Sound on my Dell 7537 doesn't come out of the integrated laptop speakers (works fine on Windows).
Audio through headphones works perfectly.

The issue came out with a fresh install of Ubuntu 14.04.2 LTS.

Related bugs/questions:
https://answers.launchpad.net/ubuntu-certification/+question/263944
https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1406355

More information:

fra@fra-pc:~$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: ALC3223 Analog [ALC3223 Analog]
  Subdevices: 0/1
  Subdevice #0: subdevice #0
card 1: HDMI [HDA Intel HDMI], device 3: HDMI 0 [HDMI 0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

fra@fra-pc:~$ cat /proc/asound/cards
 0 [PCH ]: HDA-Intel - HDA Intel PCH
                      HDA Intel PCH at 0xe3614000 irq 64
 1 [HDMI ]: HDA-Intel - HDA Intel HDMI
                      HDA Intel HDMI at 0xe3610000 irq 63

fra@fra-pc:~$ lsb_release -a
...
Distributor ID: Ubuntu
Description: Ubuntu 14.04.2 LTS
Release: 14.04
Codename: trusty

fra@fra-pc:~$ uname -a
Linux fra-pc 3.16.0-33-generic #44~14.04.1-Ubuntu SMP Fri Mar 13 10:33:29 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.16.0-33-generic 3.16.0-33.44~14.04.1
ProcVersionSignature: Ubuntu 3.16.0-33.44~14.04.1-generic 3.16.7-ckt7
Uname: Linux 3.16.0-33-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.14.1-0ubuntu3.8
Architecture: amd64
CurrentDesktop: Unity
Date: Wed Apr 1 20:58:43 2015
InstallationDate: Installed on 2015-03-20 (12 days ago)
InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
SourcePackage: linux-lts-utopic
UpgradeStatus: No upgrade log present (probably fresh install)

[penalvch (penalvch)]

Francesco Pontillo, thank you for reporting this and helping make Ubuntu better. Please re-file your report via a terminal:
ubuntu-bug audio

This will ensure that it is routed to the correct triage and development queue.

Thank you for your understanding.

Helpful bug reporting tips:
https://help.ubuntu.com/community/ReportingBugs