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[Raymond <1503737@xxxxxxxxxxxxxxxxxx>]

APLAY

**** List of PLAYBACK Hardware Devices ****
card 0: HDMI [HDA ATI HDMI], device 3: HDMI 0 [HDMI 0]
  Subdevices: 0/1
  Subdevice #0: subdevice #0
card 1: Generic [HD-Audio Generic], device 0: CX20751/2 Analog [CX20751/2 Analog]
  Subdevices: 0/1
  Subdevice #0: subdevice #0

ARECORD

**** List of CAPTURE Hardware Devices ****
card 1: Generic [HD-Audio Generic], device 0: CX20751/2 Analog [CX20751/2 Analog]
  Subdevices: 0/1
  Subdevice #0: subdevice #0


it is strange that your HDMI and analog playback are using by pulseaudio at same time 

but

Default sink name: alsa_output.pci-0000_00_14.2.analog-stereo
Default source name: alsa_input.pci-0000_00_14.2.analog-stereo



USER        PID ACCESS COMMAND
/dev/snd/pcmC1D0c:   rahul      2036 F...m pulseaudio
/dev/snd/pcmC1D0p:   rahul      2036 F...m pulseaudio
/dev/snd/controlC1:  rahul      2036 F.... pulseaudio
/dev/snd/pcmC0D3p:   rahul      2036 F...m pulseaudio
/dev/snd/controlC0:  rahul      2036 F.... pulseaudio

** Changed in: alsa-driver (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1503737

Title:
  [80E3, Conexant CX20751/2, Mic, Internal] No sound at all

Status in alsa-driver package in Ubuntu:
  Incomplete

Bug description:
  When Skype or viber starts, the internal mic stops to work and
  Pavucontrol input seection shows no response to any sound...

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: alsa-base 1.0.25+dfsg-0ubuntu4
  ProcVersionSignature: Ubuntu 3.16.0-50.66~14.04.1-generic 3.16.7-ckt16
  Uname: Linux 3.16.0-50-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.15
  Architecture: amd64
  CurrentDesktop: LXDE
  Date: Wed Oct  7 17:22:13 2015
  InstallationDate: Installed on 2015-05-16 (144 days ago)
  InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
  PackageArchitecture: all
  SourcePackage: alsa-driver
  Symptom: audio
  Symptom_AlsaRecordingTest: ALSA recording test through plughw:Generic successful
  Symptom_Card: Built-in Audio - HD-Audio Generic
  Symptom_Jack: Mic, Internal
  Symptom_PulseAudioRecordingTest: PulseAudio recording test through plughw:Generic successful
  Symptom_Type: No sound at all
  Title: [80E3, Conexant CX20751/2, Mic, Internal] No sound at all
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 12/12/2014
  dmi.bios.vendor: LENOVO
  dmi.bios.version: A2CN27WW(V1.09)
  dmi.board.asset.tag: No Asset Tag
  dmi.board.name: Lancer 5B2
  dmi.board.vendor: LENOVO
  dmi.board.version: SDK0F82993 WIN
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Lenovo G50-45
  dmi.modalias: dmi:bvnLENOVO:bvrA2CN27WW(V1.09):bd12/12/2014:svnLENOVO:pn80E3:pvrLenovoG50-45:rvnLENOVO:rnLancer5B2:rvrSDK0F82993WIN:cvnLENOVO:ct10:cvrLenovoG50-45:
  dmi.product.name: 80E3
  dmi.product.version: Lenovo G50-45
  dmi.sys.vendor: LENOVO

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