[20F5S1A600, Intel Skylake HDMI, Digital Out, HDMI] Playback problem

[Marius]

Hi,

I encountered an audio bug on my new ThinkPad X260. Since I was not able to find a fix online I will try to explain my bug and hopefully get it fixed.
I'm using Ubuntu 16.04.1 LTS on my X260 with i5-6200. I want to use HDMI with my Samsung TV to watch videos eg. So I connect the HDMI cable, I get my desktop on my TV and in sound settings I can see HDMI Output. When I select HDMI Output I hear a cracking noise from my TV speakers. When I play a test tone, it looks like the TV needs a 1 or 2 seconds to get the tone so I can only hear the end of the tone. When I repeat this test everything works. But when I open a music player eg. or Chrome with YouTube I hear the cracking noise again and I get no sound on my TV. When I close all applications and start the test tone again, I get the same results.
To sum it up. Only test tone works with HDMI, i can select the output but dont get any sound.
I attach the alsa-info-alsa-info.sh to this report.
As this is my first report, feel free to ask for further outputs eg.

Kind regards!

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: alsa-base 1.0.25+dfsg-0ubuntu5
ProcVersionSignature: Ubuntu 4.4.0-62.83-generic 4.4.40
Uname: Linux 4.4.0-62-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.5
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: marius 2072 F.... pulseaudio
CurrentDesktop: Unity
Date: Tue Feb 7 17:42:14 2017
InstallationDate: Installed on 2017-02-06 (0 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
PackageArchitecture: all
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:PCH successful
Symptom_Card: Internes Audio - HDA Intel PCH
Symptom_Jack: Digital Out, HDMI
Symptom_PulsePlaybackTest: PulseAudio playback test successful
Symptom_Type: None of the above
Title: [20F5S1A600, Intel Skylake HDMI, Digital Out, HDMI] Playback problem
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/20/2016
dmi.bios.vendor: LENOVO
dmi.bios.version: R02ET50W (1.23 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20F5S1A600
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.modalias: dmi:bvnLENOVO:bvrR02ET50W(1.23):bd09/20/2016:svnLENOVO:pn20F5S1A600:pvrThinkPadX260:rvnLENOVO:rn20F5S1A600:rvrNotDefined:cvnLENOVO:ct10:cvrNone:
dmi.product.name: 20F5S1A600
dmi.product.version: ThinkPad X260
dmi.sys.vendor: LENOVO
mtime.conffile..etc.modprobe.d.alsa-base.conf: 2017-02-07T07:13:02.858136