Public bug reported:

I can hear the sounds from my pc when i'm not using headphones

But when i put them in , i still hear the sound from my pc , it's like
if they are not detected

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: alsa-base 1.0.25+dfsg-0ubuntu4
ProcVersionSignature: Ubuntu 3.19.0-30.34~14.04.1-generic 3.19.8-ckt6
Uname: Linux 3.19.0-30-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.14.1-0ubuntu3.15
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC1:  achemlal   1942 F.... pulseaudio
 /dev/snd/pcmC2D0c:   achemlal   1942 F...m pulseaudio
 /dev/snd/controlC2:  achemlal   1942 F.... pulseaudio
CurrentDesktop: Unity
Date: Sat Oct 17 16:56:32 2015
InstallationDate: Installed on 2015-10-11 (6 days ago)
InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
PackageArchitecture: all
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:NVidia failed
Symptom_Card: HDA NVidia - HDA NVidia
Symptom_Jack: Digital Out, HDMI
Symptom_Type: Only some of outputs are working
Title: [System Product Name, Nvidia GPU 70 HDMI/DP, Digital Out, HDMI] Playback 
problem
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/27/2015
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 0703
dmi.board.asset.tag: Default string
dmi.board.name: Z170 PRO GAMING
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: Rev X.0x
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 3
dmi.chassis.vendor: Default string
dmi.chassis.version: Default string
dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvr0703:bd08/27/2015:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnZ170PROGAMING:rvrRevX.0x:cvnDefaultstring:ct3:cvrDefaultstring:
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer

** Affects: alsa-driver (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug trusty

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https://bugs.launchpad.net/bugs/1507163

Title:
  [System Product Name, Nvidia GPU 70 HDMI/DP, Digital Out, HDMI]
  Playback problem

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