Hi, I found a FIX.
My laptop is an ASUS X555UB but the fix applies to severals X555 laptops.

So, I spent all night searching and I found that this is an actual bug with an 
actual patch.
Unfortunately the patch will be queued for Linux v4.12 as written in this 
message:
http://www.spinics.net/lists/alsa-devel/msg60448.html

You will need to compile the kernel by yourself, I used v4.6.3 from Ubuntu PPA:
http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.6.3-yakkety/

Apply the Ubuntu patches.

Now apply all 5 patches from:

http://www.spinics.net/lists/alsa-devel/msg60443.html
http://www.spinics.net/lists/alsa-devel/msg60444.html
http://www.spinics.net/lists/alsa-devel/msg60445.html
http://www.spinics.net/lists/alsa-devel/msg60446.html
http://www.spinics.net/lists/alsa-devel/msg60447.html

Now, If I remember correctly the patch 2 and 4 gives some problems, you
will have to add the code lines manually to
/sound/pci/hda/patch_realtek.c

Compile the result into .deb

PS: I did not include the details, you will need to search by yourself
how to download from source, apply patches and make a .deb package.


Hope that helped.
Good Luck!

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You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1598571

Title:
  Audio-out on Asus X555 dont work

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  Have problem with headphone/microphone port in my laptop. When plug-in 
headphones, sound resume play on speackers... In Win10 i dont have this 
problem. Physicaly port work good.
  Card: HDA Intel PCH
  Chip: Realtek ALC256

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-4.4.0-30-generic 4.4.0-30.49
  ProcVersionSignature: Ubuntu 4.4.0-30.49-generic 4.4.13
  Uname: Linux 4.4.0-30-generic x86_64
  NonfreeKernelModules: nvidia_uvm nvidia_modeset nvidia
  ApportVersion: 2.20.1-0ubuntu2.1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  mnaz       1727 F.... pulseaudio
                        mnaz       9456 F.... alsamixer
  CurrentDesktop: Unity
  Date: Sun Jul  3 15:17:26 2016
  HibernationDevice: RESUME=UUID=773628e6-2536-424b-9a24-4e8c8f0a1892
  InstallationDate: Installed on 2016-06-25 (8 days ago)
  InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 
(20160420.1)
  Lsusb:
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 004: ID 0bda:57de Realtek Semiconductor Corp.
   Bus 001 Device 003: ID 0bda:0129 Realtek Semiconductor Corp. RTS5129 Card 
Reader Controller
   Bus 001 Device 002: ID 0c45:0520 Microdia MaxTrack Wireless Mouse
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: ASUSTeK COMPUTER INC. X555UB
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-30-generic.efi.signed 
root=UUID=f9ab2085-6070-4e16-969a-8769d6bd87e3 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-4.4.0-30-generic N/A
   linux-backports-modules-4.4.0-30-generic  N/A
   linux-firmware                            1.157.2
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 10/18/2015
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: X555UB.204
  dmi.board.asset.tag: ATN12345678901234567
  dmi.board.name: X555UB
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: 1.0
  dmi.chassis.asset.tag: ATN12345678901234567
  dmi.chassis.type: 10
  dmi.chassis.vendor: ASUSTeK COMPUTER INC.
  dmi.chassis.version: 1.0
  dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvrX555UB.204:bd10/18/2015:svnASUSTeKCOMPUTERINC.:pnX555UB:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnX555UB:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
  dmi.product.name: X555UB
  dmi.product.version: 1.0
  dmi.sys.vendor: ASUSTeK COMPUTER INC.

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