[MS-7968, Realtek ALC1150, Black SPDIF Out, Rear] Underruns, dropouts or crackling sound. Test tones work but sound immediatly returns to poor quality after completion.

Bug #1627504 reported by Nyall on 2016-09-25
This bug affects 3 people
Affects Status Importance Assigned to Milestone
alsa-driver (Ubuntu)

Bug Description

Using digital audio output on Intel driver.
Sound from games is barely decipherable over the distortion/crackle. Playing test tones (left/right test and on bug report) work fine but the noise returns when the clips are completed.

Tried tsched=0, hda fix 1 and hda fix 2. no luck yet
When first added tsched command, it blurs the screen and no audio devices are available. remove, restart, re-add and screen and audio back but problem still present (maybe just spelt wrong first time?).

Help appreciated.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: alsa-base 1.0.25+dfsg-0ubuntu5
ProcVersionSignature: Ubuntu 4.4.0-38.57-generic 4.4.19
Uname: Linux 4.4.0-38-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_modeset nvidia
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
 /dev/snd/controlC1: nytonial 1759 F.... pulseaudio
 /dev/snd/controlC0: nytonial 1759 F.... pulseaudio
CurrentDesktop: Unity
Date: Sun Sep 25 15:28:53 2016
InstallationDate: Installed on 2016-09-07 (17 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
PackageArchitecture: all
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:PCH successful
Symptom_Card: Built-in Audio - HDA Intel PCH
Symptom_Jack: Black SPDIF Out, Rear
Symptom_PulsePlaybackTest: PulseAudio playback test successful
Symptom_Type: Underruns, dropouts, or "crackling" sound
Title: [MS-7968, Realtek ALC1150, Black SPDIF Out, Rear] Underruns, dropouts or crackling sound
UpgradeStatus: Upgraded to xenial on 2016-09-08 (16 days ago)
dmi.bios.date: 02/23/2016
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1.60
dmi.board.asset.tag: Default string
dmi.board.vendor: MSI
dmi.board.version: 3.0
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 3
dmi.chassis.vendor: MSI
dmi.chassis.version: 3.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1.60:bd02/23/2016:svnMSI:pnMS-7968:pvr3.0:rvnMSI:rnZ170AXPOWERGAMINGTITANIUMEDITION(MS-7968):rvr3.0:cvnMSI:ct3:cvr3.0:
dmi.product.name: MS-7968
dmi.product.version: 3.0
dmi.sys.vendor: MSI
modified.conffile..etc.modprobe.d.alsa-base.conf: [modified]
mtime.conffile..etc.modprobe.d.alsa-base.conf: 2016-09-25T14:21:58.691691

Nyall (nytonial) wrote :
Launchpad Janitor (janitor) wrote :

Status changed to 'Confirmed' because the bug affects multiple users.

Changed in alsa-driver (Ubuntu):
status: New → Confirmed
Changed in alsa-driver (Ubuntu):
importance: Undecided → Medium
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