[Compaq 610, IDT 92HD75B2X5, Speaker, Internal] No sound at all

[Oliver Leitner]

soundcard is recognized.
no sound playback through internal speakers.
external usb headphones work.
all mixers are at 100%.
soundcard is being recognized and viewable through lspci and cat'ing through proc.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: alsa-base 1.0.25+dfsg-0ubuntu5
Uname: Linux 4.6.0-997-lowlatency x86_64
ApportVersion: 2.20.1-0ubuntu2
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: nevermind 2986 F.... pulseaudio
CurrentDesktop: Unity
Date: Thu May 12 00:58:48 2016
InstallationDate: Installed on 2015-05-19 (358 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
PackageArchitecture: all
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:Intel failed
Symptom_Card: Internes Audio - HDA Intel
Symptom_DevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: nevermind 2986 F.... pulseaudio
Symptom_Jack: Speaker, Internal
Symptom_Type: No sound at all
Title: [Compaq 610, IDT 92HD75B2X5, Speaker, Internal] No sound at all
UpgradeStatus: Upgraded to xenial on 2016-05-07 (4 days ago)
dmi.bios.date: 12/01/2011
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: 68PVU Ver. F.20
dmi.board.name: 308A
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 26.08
dmi.chassis.asset.tag: CNU9480YSY
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias: dmi:bvnHewlett-Packard:bvr68PVUVer.F.20:bd12/01/2011:svnHewlett-Packard:pnCompaq610:pvrF.20:rvnHewlett-Packard:rn308A:rvrKBCVersion26.08:cvnHewlett-Packard:ct10:cvr:
dmi.product.name: Compaq 610
dmi.product.version: F.20
dmi.sys.vendor: Hewlett-Packard
mtime.conffile..etc.modprobe.d.alsa-base.conf: 2016-05-12T00:39:28.644247