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Message #142565
[Bug 1425221] Re: [OptiPlex 9020, Realtek ALC280, Green Line Out, Rear] tinny sound
1.611977] autoconfig: line_outs=1 (0x1b/0x0/0x0/0x0/0x0) type:line
[ 1.611979] speaker_outs=1 (0x14/0x0/0x0/0x0/0x0)
[ 1.611980] hp_outs=1 (0x15/0x0/0x0/0x0/0x0)
[ 1.611980] mono: mono_out=0x0
[ 1.611981] inputs:
[ 1.611982] Front Mic=0x1a
[ 1.611982] Rear Mic=0x18
https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/commit/sound/pci/hda?id=03ad6a8c93b6df2d65c305b5b5f9474068b45bfb
you need this parch to change pcm playback volume to speaker+lo playback volume if speaker and line out share the volume control
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https://bugs.launchpad.net/bugs/1425221
Title:
[OptiPlex 9020, Realtek ALC280, Green Line Out, Rear] tinny sound
Status in alsa-driver package in Ubuntu:
Confirmed
Bug description:
Sound equalization is normal when using jack in front of computer, but
is "tinny" (i.e., low/nonexistent bass and midtones) when using rear
output jack with simple two channel headphones.
Jack sense is working correctly because the internal speaker cuts out
when a cable is plugged into the rear jack (or front jack, for that
matter).
Note Dell's website says this computer has a Realtek ALC3220, as
opposed to the ALC280 which is detected by linux. This is a clean
install of 14.04, so I unfortunately I can't boot into Windows to
observe its behavior.
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: alsa-base 1.0.25+dfsg-0ubuntu4
ProcVersionSignature: Ubuntu 3.13.0-45.74-generic 3.13.11-ckt13
Uname: Linux 3.13.0-45-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.7
Architecture: amd64
CurrentDesktop: Unity
Date: Tue Feb 24 12:31:49 2015
InstallationDate: Installed on 2015-01-30 (25 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
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: High background noise, or volume is too low
Title: [OptiPlex 9020, Realtek ALC280, Green Line Out, Rear] Background noise or low volume
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 11/20/2014
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A09
dmi.board.name: 06X1TJ
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 6
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA09:bd11/20/2014:svnDellInc.:pnOptiPlex9020:pvr01:rvnDellInc.:rn06X1TJ:rvrA00:cvnDellInc.:ct6:cvr:
dmi.product.name: OptiPlex 9020
dmi.product.version: 01
dmi.sys.vendor: Dell Inc.
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References