Public bug reported:

When I put the audio out on the TV through HDMI there is a delay for the
sound to start appearing after leaving a video or music paused for a few
minutes.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: alsa-base 1.0.25+dfsg-0ubuntu5
ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
Uname: Linux 4.15.0-20-generic x86_64
ApportVersion: 2.20.9-0ubuntu7
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC1:  diogo      2410 F.... pulseaudio
 /dev/snd/pcmC0D3p:   diogo      2410 F...m pulseaudio
 /dev/snd/controlC0:  diogo      2410 F.... pulseaudio
CurrentDesktop: ubuntu:GNOME
Date: Thu Apr 26 20:01:34 2018
InstallationDate: Installed on 2018-04-20 (6 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Beta amd64 (20180404)
PackageArchitecture: all
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:HDMI successful
Symptom_Card: Áudio interno - HDA Intel HDMI
Symptom_Jack: Digital Out, HDMI
Symptom_PulsePlaybackTest: PulseAudio playback test successful
Symptom_Type: None of the above
Title: [300E5K/300E5Q, Intel Broadwell HDMI, Digital Out, HDMI] Playback problem
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/07/2016
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: P02RDQ.029.160707.JJ
dmi.board.asset.tag: No Asset Tag
dmi.board.name: NP300E5K-KF1BR
dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD.
dmi.board.version: SGL8732A0Z-C01-G001-S0001+10.0.10586
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 9
dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD.
dmi.chassis.version: N/A
dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvrP02RDQ.029.160707.JJ:bd07/07/2016:svnSAMSUNGELECTRONICSCO.,LTD.:pn300E5K/300E5Q:pvrP02RDQ:rvnSAMSUNGELECTRONICSCO.,LTD.:rnNP300E5K-KF1BR:rvrSGL8732A0Z-C01-G001-S0001+10.0.10586:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvrN/A:
dmi.product.family: SAMSUNG ATIV
dmi.product.name: 300E5K/300E5Q
dmi.product.version: P02RDQ
dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD.

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


** Tags: amd64 apport-bug bionic

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https://bugs.launchpad.net/bugs/1767219

Title:
  Audio Delay - [300E5K/300E5Q, Intel Broadwell HDMI, Digital Out, HDMI]
  Playback problem

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