Public bug reported:
I've upgraded my computer to a new one with a Realtek ALC1220 from an
ASUS crosshair VI hero and on my ubuntu 17.10 my 5.1 surround left audio
is busted, I've configured the system audio to 5.1 and tested all
speakers one by one and the only one that isn't working correctly is the
left speaker, it emits the testing sound but is disturbed and very low,
I've checked alsaconf and everything is alright there.
ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: alsa-base 1.0.25+dfsg-0ubuntu5
ProcVersionSignature: Ubuntu 4.13.0-22.25-generic 4.13.13
Uname: Linux 4.13.0-22-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
ApportVersion: 2.20.7-0ubuntu3.6
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: biohazard 1481 F.... pulseaudio
/dev/snd/controlC1: biohazard 1481 F.... pulseaudio
CurrentDesktop: GNOME
Date: Mon Dec 25 15:39:30 2017
InstallationDate: Installed on 2017-12-25 (0 days ago)
InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20171018)
PackageArchitecture: all
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:Generic failed
Symptom_Card: HD-Audio Generic - HD-Audio Generic
Symptom_Jack: Green Line Out, Rear
Symptom_Type: High background noise, or volume is too low
Title: [System Product Name, Realtek ALC1220, Green Line Out, Rear] Background
noise or low volume
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 11/29/2017
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 3008
dmi.board.asset.tag: Default string
dmi.board.name: ROG CROSSHAIR VI HERO (WI-FI AC)
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 3
dmi.chassis.vendor: Default string
dmi.chassis.version: Default string
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvr3008:bd11/29/2017:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnROGCROSSHAIRVIHERO(WI-FIAC):rvrRev1.xx:cvnDefaultstring:ct3:cvrDefaultstring:
dmi.product.family: To be filled by O.E.M.
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer
** Affects: alsa-driver (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug artful
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https://bugs.launchpad.net/bugs/1740033
Title:
[Realtek ALC1220, Green Line Out, Rear] Background noise or low volume
on left speaker only
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