Public bug reported:

I'm using Ubuntu Mate 16.04 with the current updates.

When I start the computer, pulseaudio is not working after I've logged
in.

If I type:
     start-pulseaudio-x11
from the command line, I get
"Connection failure: Connection refused
pa_context_connect() failed: Connection refused"
and I cannot play any sound.

If I type pulseaudio& on the command line, I can get sound in some
applications (e.g. Audacity) but not others (e.g. Firefox or other
browsers).  At some point a command line message appears that says: "E:
[pulseaudio] bluez5-util.c: GetManagedObjects() failed:
org.freedesktop.DBus.Error.NoReply: Did not receive a reply. Possible
causes include: the remote application did not send a reply, the message
bus security policy blocked the reply, the reply timeout expired, or the
network connection was broken."

I'm not clear why there's a reference to bluez5-util, since I don't have
bluetooth on my machine.

pulseaudio:
  Installed: 1:8.0-0ubuntu3
  Candidate: 1:8.0-0ubuntu3
  Version table:
 *** 1:8.0-0ubuntu3 500
        500 http://gb.archive.ubuntu.com/ubuntu xenial/main amd64 Packages
        100 /var/lib/dpkg/status

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: alsa-base 1.0.25+dfsg-0ubuntu5
ProcVersionSignature: Ubuntu 4.4.0-31.50-generic 4.4.13
Uname: Linux 4.4.0-31-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_modeset nvidia
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
CurrentDesktop: MATE
Date: Tue Jul 19 17:43:11 2016
InstallationDate: Installed on 2016-05-10 (70 days ago)
InstallationMedia: Ubuntu-MATE 16.04 LTS "Xenial Xerus" - Release amd64 
(20160420.1)
PackageArchitecture: all
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:NVidia failed
Symptom_Card: GK208 HDMI/DP Audio Controller - HDA NVidia
Symptom_Jack: Digital Out, HDMI
Symptom_Type: No sound at all
Title: [Z97X-UD3H, Nvidia GPU 51 HDMI/DP, Digital Out, HDMI] No sound at all
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/21/2015
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: F8
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: Z97X-UD3H-CF
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: x.x
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvrF8:bd04/21/2015:svnGigabyteTechnologyCo.,Ltd.:pnZ97X-UD3H:pvrTobefilledbyO.E.M.:rvnGigabyteTechnologyCo.,Ltd.:rnZ97X-UD3H-CF:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.name: Z97X-UD3H
dmi.product.version: To be filled by O.E.M.
dmi.sys.vendor: Gigabyte Technology Co., Ltd.

** Affects: pulseaudio (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug xenial

** Package changed: alsa-driver (Ubuntu) => pulseaudio (Ubuntu)

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https://bugs.launchpad.net/bugs/1604497

Title:
  Pulseaudio does not start

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