[N550JV, Realtek ALC668, Black Mic, Left] Recording problem

[Adrian]

I insert headset into the leftside jack and I have no microphone input.

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
ApportVersion: 2.14.1-0ubuntu3
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: adrian 2778 F.... pulseaudio
 /dev/snd/controlC0: adrian 2778 F.... pulseaudio
CurrentDesktop: Unity
Date: Tue Jun 24 18:15:32 2014
InstallationDate: Installed on 2014-04-12 (73 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Beta amd64 (20140326)
PackageArchitecture: all
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaRecordingTest: ALSA recording test through plughw:PCH failed
Symptom_Card: Built-in Audio - HDA Intel PCH
Symptom_Jack: Black Mic, Left
Symptom_Type: Only some of inputs are working
Title: [N550JV, Realtek ALC668, Black Mic, Left] Recording problem
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/17/2013
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: N550JV.207
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: N550JV
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: 1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK COMPUTER INC.
dmi.chassis.version: 1.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrN550JV.207:bd09/17/2013:svnASUSTeKCOMPUTERINC.:pnN550JV:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnN550JV:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
dmi.product.name: N550JV
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK COMPUTER INC.

[Launchpad Janitor (janitor)]

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