@rykien:
Seems like a bug in the driver for the SMBus controller. i2cdetect should show 
the headphone amplifier at address 0x73.
I've tested init-headphone with Ubuntu 16.04.1 (you have to add the 
acpi_enforce_resources=lax boot parameter!) and 16.10 live images without 
problems. Maybe the bug was introduced in an update.

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https://bugs.launchpad.net/bugs/1313904

Title:
  [W230SS, VIA VT1802, Green Headphone Out, Front] No sound after
  suspend/resume

Status in ALSA driver:
  Unknown
Status in alsa-driver package in Ubuntu:
  Confirmed

Bug description:
  No sound in headphones jack after suspend/resume.
  But sound in headphones jack is OK after cold boot.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: alsa-base 1.0.25+dfsg-0ubuntu4
  Uname: Linux 3.15.0-031500rc2-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  mik        2139 F.... pulseaudio
   /dev/snd/controlC1:  mik        2139 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Mon Apr 28 23:20:59 2014
  InstallationDate: Installed on 2014-04-26 (2 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  PackageArchitecture: all
  SourcePackage: alsa-driver
  Symptom: audio
  Symptom_AlsaPlaybackTest: ALSA playback test through plughw:PCH failed
  Symptom_Card: Вбудоване аудіо - HDA Intel PCH
  Symptom_DevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  mik        2139 F.... pulseaudio
   /dev/snd/controlC1:  mik        2139 F.... pulseaudio
  Symptom_Jack: Green Headphone Out, Front
  Symptom_Type: No sound at all
  Title: [W230SS, VIA VT1802, Green Headphone Out, Front] No sound at all
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 02/11/2014
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 4.6.5
  dmi.board.asset.tag: Tag 12345
  dmi.board.name: W230SS
  dmi.board.vendor: Notebook
  dmi.board.version: Not Applicable
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 9
  dmi.chassis.vendor: Notebook
  dmi.chassis.version: N/A
  dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvr4.6.5:bd02/11/2014:svnNotebook:pnW230SS:pvrNotApplicable:rvnNotebook:rnW230SS:rvrNotApplicable:cvnNotebook:ct9:cvrN/A:
  dmi.product.name: W230SS
  dmi.product.version: Not Applicable
  dmi.sys.vendor: Notebook
  mtime.conffile..etc.modprobe.d.alsa.base.conf: 2014-04-28T23:13:10.065027

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