speech-dispatcher causes audio corruption (maybe overdrive?) to [Nvidia GPU 40 HDMI/DP, Digital Out, HDMI]

[John Drinkwater]

On first session launch, audio will be corrupt and anything played will result in garbage. If I however remove all 4 speech-dispatcher processes which appear in sound preferences, audio returns to normal and is fine for the remaining session.

Brand new upgrade to Ubuntu 15.10, no custom packages, but this was happening in 15.04 as well.

ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: alsa-base 1.0.25+dfsg-0ubuntu5
ProcVersionSignature: Ubuntu 4.2.0-27.32-generic 4.2.8-ckt1
Uname: Linux 4.2.0-27-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.19.1-0ubuntu5
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: john 2063 F.... pulseaudio
 /dev/snd/controlC2: john 2063 F.... pulseaudio
 /dev/snd/controlC0: john 2063 F.... pulseaudio
CurrentDesktop: GNOME-Flashback:Unity
Date: Tue Feb 2 14:42:23 2016
InstallationDate: Installed on 2015-06-05 (241 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
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: None of the above
Title: [To Be Filled By O.E.M., Nvidia GPU 40 HDMI/DP, Digital Out, HDMI] Playback problem
UpgradeStatus: Upgraded to wily on 2016-02-02 (0 days ago)
dmi.bios.date: 04/02/2011
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 080014
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: A76ML-K 30
dmi.board.vendor: FOXCONN
dmi.board.version: 1.0
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.:bvr080014:bd04/02/2011:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnFOXCONN:rnA76ML-K30:rvr1.0:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.name: To Be Filled By O.E.M.
dmi.product.version: To Be Filled By O.E.M.
dmi.sys.vendor: To Be Filled By O.E.M.

[Daniel van Vugt (vanvugt)]

Thank you for reporting this bug to Ubuntu.
Ubuntu 15.10 (wily) reached end-of-life on July 28, 2016.

See this document for currently supported Ubuntu releases:
https://wiki.ubuntu.com/Releases

We appreciate that this bug may be old and you might not be interested in discussing it any more. But if you are then please upgrade to the latest Ubuntu version and re-test. If you then find the bug is still present in the newer Ubuntu version, please add a comment here telling us which new version it is in and change the bug status to Confirmed.