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[Raymond <1516303@xxxxxxxxxxxxxxxxxx>]

https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/commit/sound/pci/hda/patch_conexant.c?id=d0ea6d270bd9f1883f716f92e7837152a4146cf7


static const struct hda_verb cxt5051_hp_dv6736_init_verbs[] = {
-	/* Line in, Mic */
-	{0x17, AC_VERB_SET_AMP_GAIN_MUTE, AMP_IN_UNMUTE(0) | 0x03},
-	{0x17, AC_VERB_SET_PIN_WIDGET_CONTROL, PIN_VREF80},
-	{0x18, AC_VERB_SET_PIN_WIDGET_CONTROL, 0x0},
-	{0x1d, AC_VERB_SET_PIN_WIDGET_CONTROL, 0x0},
-	/* SPK  */
-	{0x1a, AC_VERB_SET_PIN_WIDGET_CONTROL, PIN_OUT},
-	{0x1a, AC_VERB_SET_CONNECT_SEL, 0x00},
-	/* HP, Amp  */
-	{0x16, AC_VERB_SET_PIN_WIDGET_CONTROL, PIN_HP},
-	{0x16, AC_VERB_SET_CONNECT_SEL, 0x00},
-	/* DAC1 */
-	{0x10, AC_VERB_SET_AMP_GAIN_MUTE, AMP_OUT_UNMUTE},
-	/* Record selector: Internal mic */
-	{0x14, AC_VERB_SET_AMP_GAIN_MUTE, AMP_IN_UNMUTE(1) | 0x44},
-	{0x14, AC_VERB_SET_CONNECT_SEL, 0x1},
-	/* SPDIF route: PCM */
-	{0x1c, AC_VERB_SET_CONNECT_SEL, 0x0},
-	/* EAPD */
-	{0x1a, AC_VERB_SET_EAPD_BTLENABLE, 0x2}, /* default on */
-	{0x16, AC_VERB_SET_UNSOLICITED_ENABLE, AC_USRSP_EN|CONEXANT_HP_EVENT},
-	{ } /* end */
-};


you have to file upstream bug report

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https://bugs.launchpad.net/bugs/1516303

Title:
  [snd-hda-intel] No output sound on HDMI for conexant CX20561

Status in alsa-driver package in Ubuntu:
  Incomplete

Bug description:
  In other LTS ubuntu versions , I can get a HDMI output sound

  In 10.04 (out the box)
  In 12.04: need 'options snd-hda-intel model=hp-dv6736' to work
  In 14.04 not available!

  Possible regression!

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: alsa-base 1.0.25+dfsg-0ubuntu4
  ProcVersionSignature: Ubuntu 3.16.0-39.53~14.04.1-generic 3.16.7-ckt11
  Uname: Linux 3.16.0-39-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.18
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  jacsalomon   1843 F.... pulseaudio
  CurrentDesktop: XFCE
  Date: Sat Nov 14 13:49:22 2015
  InstallationDate: Installed on 2015-10-25 (20 days ago)
  InstallationMedia: Linux Mint 17.2 "Rafaela" - Release amd64 20150723
  PackageArchitecture: all
  SourcePackage: alsa-driver
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 12/01/2008
  dmi.bios.vendor: Phoenix
  dmi.bios.version: F.2E
  dmi.board.name: 30CE
  dmi.board.vendor: Wistron
  dmi.board.version: 80.52
  dmi.chassis.type: 10
  dmi.chassis.vendor: Hewlett-Packard
  dmi.chassis.version: N/A
  dmi.modalias: dmi:bvnPhoenix:bvrF.2E:bd12/01/2008:svnHewlett-Packard:pnHPPaviliondv2700NotebookPC:pvrF.2E:rvnWistron:rn30CE:rvr80.52:cvnHewlett-Packard:ct10:cvrN/A:
  dmi.product.name: HP Pavilion dv2700 Notebook PC
  dmi.product.version: F.2E
  dmi.sys.vendor: Hewlett-Packard
  mtime.conffile..etc.modprobe.d.alsa.base.conf: 2015-11-14T13:29:09.262950
  --- 
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  ApportVersion: 2.0.1-0ubuntu17.13
  Architecture: amd64
  ArecordDevices:
   **** List of CAPTURE Hardware Devices ****
   card 1: Intel [HDA Intel], device 0: CONEXANT Analog [CONEXANT Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  jacsalomon   2808 F.... pulseaudio
  Card1.Amixer.info:
   Card hw:1 'Intel'/'HDA Intel at 0xf4500000 irq 48'
     Mixer name	: 'Conexant CX20561 (Hermosa)'
     Components	: 'HDA:14f15051,103c30cd,00100000'
     Controls      : 12
     Simple ctrls  : 6
  DistroRelease: LinuxMint 13
  InstallationMedia: Linux Mint 13 "Maya" - Release amd64 (20120520)
  MarkForUpload: True
  NonfreeKernelModules: nvidia
  Package: alsa-base 1.0.25+dfsg-0ubuntu1.1 [origin: Ubuntu]
  PackageArchitecture: all
  ProcVersionSignature: Ubuntu 3.2.0-93.133-generic 3.2.72
  Tags: maya third-party-packages
  Uname: Linux 3.2.0-93-generic x86_64
  UnreportableReason: Este no es un paquete oficial de LinuxMint. Desinstale cualquier paquete de terceros e inténtelo de nuevo.
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm audio cdrom dialout dip kvm libvirtd lpadmin plugdev sambashare sudo tty
  dmi.bios.date: 12/01/2008
  dmi.bios.vendor: Phoenix
  dmi.bios.version: F.2E
  dmi.board.name: 30CE
  dmi.board.vendor: Wistron
  dmi.board.version: 80.52
  dmi.chassis.type: 10
  dmi.chassis.vendor: Hewlett-Packard
  dmi.chassis.version: N/A
  dmi.modalias: dmi:bvnPhoenix:bvrF.2E:bd12/01/2008:svnHewlett-Packard:pnHPPaviliondv2700NotebookPC:pvrF.2E:rvnWistron:rn30CE:rvr80.52:cvnHewlett-Packard:ct10:cvrN/A:
  dmi.product.name: HP Pavilion dv2700 Notebook PC
  dmi.product.version: F.2E
  dmi.sys.vendor: Hewlett-Packard
  mtime.conffile..etc.modprobe.d.alsa.base.conf: 2015-11-12T10:32:56.816909

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