Public bug reported:

External headphones don't work any more. Not sure if realted to the
internal speakers problem: https://bugs.launchpad.net/ubuntu/+source
/alsa-driver/+bug/1721074

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: alsa-base 1.0.25+dfsg-0ubuntu5
ProcVersionSignature: Ubuntu 4.13.0-31.34~16.04.1-generic 4.13.13
Uname: Linux 4.13.0-31-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
ApportVersion: 2.20.1-0ubuntu2.15
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0:  cc16       2550 F.... pulseaudio
 /dev/snd/controlC1:  cc16       2550 F.... pulseaudio
CurrentDesktop: Unity
Date: Fri Feb  2 14:51:06 2018
InstallationDate: Installed on 2017-08-22 (164 days ago)
InstallationMedia: Ubuntu 16.04.3 LTS "Xenial Xerus" - Release amd64 (20170801)
PackageArchitecture: all
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:PCH failed
Symptom_Card: Built-in Audio - HDA Intel PCH
Symptom_DevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0:  cc16       2550 F.... pulseaudio
 /dev/snd/controlC1:  cc16       2550 F.... pulseaudio
Symptom_Jack: Black Headphone Out, Right
Symptom_Type: No sound at all
Title: [P95_HR, Realtek ALC1220, Black Headphone Out, Right] No sound at all
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 06/29/2017
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1.05.02
dmi.board.asset.tag: Tag 12345
dmi.board.name: P95_HR
dmi.board.vendor: CLEVO
dmi.board.version: Not Applicable
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: Notebook
dmi.chassis.version: N/A
dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvr1.05.02:bd06/29/2017:svnPCSpecialistLimited:pnP95_HR:pvrNotApplicable:rvnCLEVO:rnP95_HR:rvrNotApplicable:cvnNotebook:ct10:cvrN/A:
dmi.product.family: Not Applicable
dmi.product.name: P95_HR
dmi.product.version: Not Applicable
dmi.sys.vendor: PC Specialist Limited

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


** Tags: amd64 apport-bug xenial

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https://bugs.launchpad.net/bugs/1747023

Title:
  [P95_HR, Realtek ALC1220, Black Headphone Out, Right] No sound at all

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