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[UltyX <1445861@xxxxxxxxxxxxxxxxxx>]

> did you customise default.pa to select any specified sink ?
Not to my knowledge. I only used the default kde device preferences tool to pick my sound card and set it to 5.1 and mark it as most preferred. And I used alsamixer to unmute/set volume on the different channels.  

> https://wiki.ubuntu.com/PulseAudio/Log
I set enable-lfe-remixing = yes back to 'no' and then went through the process of reproducing the subwoofer sound drops out bug on my system:
1. Ran the commands:
echo autospawn = no >> ~/.config/pulse/client.conf  #use ~/.pulse/client.conf on Ubuntu <= 12.10
killall pulseaudio
LANG=C pulseaudio -vvvv --log-time=1 > ~/pulseverbose.log 2>&1

2. Started Clementine to play some bass heavy audio:  Result no subwoofer output
3. Went into device preferences and set my buildin card to  stereo output and after about a sec. back to 5.1: Result subwoofer output worked for the still playing song.
4. After playback of the song was ended I tried playing it again: Result no subwoofer output
5. ^c 

** Attachment added: "pulseverbose.log"
   https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1445861/+attachment/4380042/+files/pulseverbose.log

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https://bugs.launchpad.net/bugs/1445861

Title:
  Subwoofer drops out when playback ends

Status in alsa-driver package in Ubuntu:
  Incomplete

Bug description:
  When audio is played in a 5.1 configuration then there is no sound coming from the Subwoofer channel by default.
  Functionality of the Subwoofer channel can be temporarily restored by switching the audio profile from 5.1 to stereo and back to 5.1 again.

  Changing the line in  /etc/pulse/daemon.conf
  from
  ;  enable-lfe-remixing = no
  to
  enable-lfe-remixing = yes

  Fixes this issue permanently with my current hardware configuration.

  
  ubuntu-bug wrongly identified the Nvidia HDMI port as the symptomatic card. The actual  playback device is the build in Intel HDA ALC1150 audio chipset.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.10
  Package: alsa-base 1.0.25+dfsg-0ubuntu4
  ProcVersionSignature: Ubuntu 3.16.0-34.47-generic 3.16.7-ckt8
  Uname: Linux 3.16.0-34-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.14.7-0ubuntu8.4
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC2:  ulty       2968 F.... pulseaudio
   /dev/snd/controlC1:  ulty       2968 F.... pulseaudio
   /dev/snd/pcmC0D0p:   ulty       2968 F...m pulseaudio
   /dev/snd/controlC0:  ulty       2968 F.... pulseaudio
  CurrentDesktop: KDE
  Date: Sun Apr 19 06:48:18 2015
  InstallationDate: Installed on 2014-10-18 (182 days ago)
  InstallationMedia: Kubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  PackageArchitecture: all
  SourcePackage: alsa-driver
  Symptom: audio
  Symptom_AlsaPlaybackTest: ALSA playback test through plughw:NVidia successful
  Symptom_Card: GK104 HDMI Audio Controller - HDA NVidia
  Symptom_Jack: Digital Out, HDMI
  Symptom_PulsePlaybackTest: PulseAudio playback test successful
  Symptom_Type: Only some of outputs are working
  Title: [All Series, Nvidia GPU 40 HDMI/DP, Digital Out, HDMI] Playback problem
  UpgradeStatus: Upgraded to utopic on 2014-10-25 (175 days ago)
  dmi.bios.date: 02/06/2015
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 1401
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: X99-A
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: Rev 1.xx
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 3
  dmi.chassis.vendor: To Be Filled By O.E.M.
  dmi.chassis.version: To Be Filled By O.E.M.
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1401:bd02/06/2015:svnASUS:pnAllSeries:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnX99-A:rvrRev1.xx:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
  dmi.product.name: All Series
  dmi.product.version: System Version
  dmi.sys.vendor: ASUS

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