Public bug reported:
Microphone connected via TRRS plug on Macbook Air 5,1 is not recognised.
Selecting "Analogue In" in Pulseaudio mixer is same as selecting
"Microphone" - i.e. sounds recorded are always the Internal microphone,
and not the microphone connected via the TRRS plug. When using OSX
however, the TRRS microphone works correctly.
Have tried booting Live CDs of 12.04, 13.04, and 14.04, and even tried
upgrading kernel to 3.15, and problem persists.
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: alsa-base 1.0.25+dfsg-0ubuntu4
ProcVersionSignature: Ubuntu 3.13.0-29.53-generic 3.13.11.2
Uname: Linux 3.13.0-29-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.14.1-0ubuntu3.2
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: scrosby 2172 F.... pulseaudio
/dev/snd/pcmC0D0c: scrosby 2172 F...m pulseaudio
CurrentDesktop: Unity
Date: Thu Jun 12 16:58:10 2014
InstallationDate: Installed on 2014-02-24 (107 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64+mac (20140223)
PackageArchitecture: all
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaRecordingTest: ALSA recording test through plughw:PCH successful
Symptom_Card: Built-in Audio - HDA Intel PCH
Symptom_Jack: Blue Line In, Rear
Symptom_PulseAudioRecordingTest: PulseAudio recording test through plughw:PCH
failed
Symptom_Type: Only some of inputs are working
Title: [MacBookAir5,1, Cirrus Logic CS4206, Blue Line In, Rear] Recording
problem
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 11/27/2012
dmi.bios.vendor: Apple Inc.
dmi.bios.version: MBA51.88Z.00EF.B02.1211271028
dmi.board.asset.tag: Base Board Asset Tag#
dmi.board.name: Mac-66F35F19FE2A0D05
dmi.board.vendor: Apple Inc.
dmi.board.version: MacBookAir5,1
dmi.chassis.type: 10
dmi.chassis.vendor: Apple Inc.
dmi.chassis.version: Mac-66F35F19FE2A0D05
dmi.modalias:
dmi:bvnAppleInc.:bvrMBA51.88Z.00EF.B02.1211271028:bd11/27/2012:svnAppleInc.:pnMacBookAir5,1:pvr1.0:rvnAppleInc.:rnMac-66F35F19FE2A0D05:rvrMacBookAir5,1:cvnAppleInc.:ct10:cvrMac-66F35F19FE2A0D05:
dmi.product.name: MacBookAir5,1
dmi.product.version: 1.0
dmi.sys.vendor: Apple Inc.
modified.conffile..etc.modprobe.d.alsa.base.conf: [deleted]
** Affects: alsa-driver (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug trusty
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https://bugs.launchpad.net/bugs/1329191
Title:
[MacBookAir5,1, Cirrus Logic CS4206, Blue Line In, Rear] Line In using
TRRS plug does not work correctly
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