Workaround that seems to work (Ubuntu system with systemd and
pulseaudio)
Create this file "~/.config/systemd/user/pulseaudio.preconf.service"
with this content
[Unit]
Description=Sound Service PreConf
ConditionUser=!root
[Service]
Type=oneshot
ExecStart=amixer set "Channel mode" "6ch"
[Install]
WantedBy=pulseaudio.service
systemctl --user enable pulseaudio.preconf.service
and restart
This mixer setting should be persistent automatically across reboots.
And for pulseaudio integration, it should be able to configure this
setting in the GUI
** Also affects: pulseaudio (Ubuntu)
Importance: Undecided
Status: New
** Changed in: alsa-driver (Ubuntu)
Status: Expired => Confirmed
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https://bugs.launchpad.net/bugs/1505584
Title:
[Realtek ALC887-VD] Playback only through 2 channels by default
Status in alsa-driver package in Ubuntu:
Confirmed
Status in pulseaudio package in Ubuntu:
New
Bug description:
Ubuntu does not detect my 5.1 surround sound[0] by default. In order
to get it detected, I have to do the following:
1) Open alsamixer
2) Change the "Channel Mode" setting from "2ch" to "6ch" (there is also a
"4ch" setting)
3) `pulseaudio -k`
I have to do this on every boot, as the "6ch" setting is not
remembered.
[0] My soundcard and sound system are 5.1, but I actually only have front
left, center, right and the subwoofer. This shouldn't affect how Ubuntu acts
at all (because it can't know what speakers I have plugged in to my subwoofer),
but will mean that I can't report on whether or not rear channels are working
as expected.
ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: alsa-base 1.0.25+dfsg-0ubuntu4
ProcVersionSignature: Ubuntu 3.19.0-30.34-generic 3.19.8-ckt6
Uname: Linux 3.19.0-30-generic x86_64
ApportVersion: 2.17.2-0ubuntu1.5
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: daniel 24007 F.... pulseaudio
CurrentDesktop: Unity
Date: Tue Oct 13 10:23:16 2015
EcryptfsInUse: Yes
InstallationDate: Installed on 2014-07-30 (439 days ago)
InstallationMedia: Ubuntu-Server 14.04.1 LTS "Trusty Tahr" - Release amd64
(20140722.3)
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: Green Line Out, Rear
Symptom_PulsePlaybackTest: PulseAudio playback test successful
Symptom_Type: Only some of outputs are working
Title: [MS-7788, Realtek ALC887-VD, Green Line Out, Rear] Playback problem
UpgradeStatus: Upgraded to vivid on 2015-08-24 (49 days ago)
dmi.bios.date: 01/18/2012
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: V2.3
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: H61M-P31 (G3) (MS-7788)
dmi.board.vendor: MSI
dmi.board.version: 1.0
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: MSI
dmi.chassis.version: 1.0
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvrV2.3:bd01/18/2012:svnMSI:pnMS-7788:pvr1.0:rvnMSI:rnH61M-P31(G3)(MS-7788):rvr1.0:cvnMSI:ct3:cvr1.0:
dmi.product.name: MS-7788
dmi.product.version: 1.0
dmi.sys.vendor: MSI
modified.conffile..etc.modprobe.d.alsa.base.conf: [modified]
mtime.conffile..etc.modprobe.d.alsa.base.conf: 2015-08-05T11:15:16.899686
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