Are you using your laptop with the lid closed, or is there just no sound
after you reopen it?
Also, please try running this command before and after the problem
occurs:
$ ps ux | grep pulseaudio
I suspect the issue might be that the pulseaudio process is vanishing.
** Changed in: pulseaudio (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1707027
Title:
Sound device no longer detected after closing laptop lid
Status in pulseaudio package in Ubuntu:
Incomplete
Bug description:
My sound device was working ok before I closed my laptop lid last week.
At that time I had Ubuntu 17.04, then I decided to overwrite all the disk
contents with a fresh install of Ubuntu 16.04 LTS but I still have the same
problem, even right after the new OS installation.
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: pulseaudio 1:8.0-0ubuntu3.3
ProcVersionSignature: Ubuntu 4.10.0-27.30~16.04.2-generic 4.10.17
Uname: Linux 4.10.0-27-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.10
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: alan 1726 F.... pulseaudio
Date: Thu Jul 27 14:21:12 2017
InstallationDate: Installed on 2017-07-21 (5 days ago)
InstallationMedia: Ubuntu 16.04.2 LTS "Xenial Xerus" - Release amd64
(20170215.2)
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No
PulseAudio daemon running, or not running as session daemon.
SourcePackage: pulseaudio
Symptom: audio
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/09/2017
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.1.2
dmi.board.name: 09WC1G
dmi.board.vendor: Dell Inc.
dmi.board.version: A01
dmi.chassis.type: 10
dmi.chassis.vendor: Dell Inc.
dmi.modalias:
dmi:bvnDellInc.:bvr1.1.2:bd03/09/2017:svnDellInc.:pnInspiron7460:pvr:rvnDellInc.:rn09WC1G:rvrA01:cvnDellInc.:ct10:cvr:
dmi.product.name: Inspiron 7460
dmi.sys.vendor: Dell Inc.
modified.conffile..etc.pulse.default.pa: [modified]
mtime.conffile..etc.pulse.default.pa: 2017-07-27T11:37:21.959813
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