Public bug reported:

I guess this T470s model needs to be added to the driver according to the 
comment on

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: alsa-base 1.0.25+dfsg-0ubuntu5
ProcVersionSignature: Ubuntu 4.10.0-30.34~16.04.1-generic 4.10.17
Uname: Linux 4.10.0-30-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.10
Architecture: amd64
 /dev/snd/controlC0:  nyga       1758 F.... pulseaudio
CurrentDesktop: Unity
Date: Thu Aug 10 21:39:17 2017
InstallationDate: Installed on 2017-08-10 (0 days ago)
InstallationMedia: Ubuntu 16.04.3 LTS "Xenial Xerus" - Release amd64 (20170801)
PackageArchitecture: all
SourcePackage: alsa-driver
UpgradeStatus: No upgrade log present (probably fresh install) 12/27/2016
dmi.bios.vendor: LENOVO
dmi.bios.version: N1WET25W (1.04 )
dmi.board.asset.tag: Not Available 20HGS0A600
dmi.board.vendor: LENOVO
dmi.board.version: Not Defined
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi:bvnLENOVO:bvrN1WET25W(1.04):bd12/27/2016:svnLENOVO:pn20HGS0A600:pvrThinkPadT470s:rvnLENOVO:rn20HGS0A600:rvrNotDefined:cvnLENOVO:ct10:cvrNone: 20HGS0A600
dmi.product.version: ThinkPad T470s
dmi.sys.vendor: LENOVO
mtime.conffile..etc.modprobe.d.alsa-base.conf: 2017-08-10T21:15:25.735875

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

** Tags: amd64 apport-bug xenial

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  No audio jack output on Lenovo Thinkpad T470s docking station. Maybe
  related to (Bug 893611)?

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