No analog input for headphone microphone in system settings

[Theron Muller]

Up until just a few weeks ago my headphone microphone was working fine in Ubuntu 14.04, but recently the only input selection available in the settings menu is the 'Internal microphone'. I've looked in alsamixer, but it only has one entry for 'mic' and another for 'mic boost'. Plugging in the mic input drops the internal mic input to no sound, but the headphone mic doesn't seem to be sending any sound through to the computer. The stereo out jack is working fine.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: pulseaudio 1:4.0-0ubuntu11.1
ProcVersionSignature: Ubuntu 3.13.0-68.111-generic 3.13.11-ckt27
Uname: Linux 3.13.0-68-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.19
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: theron 9023 F.... pulseaudio
 /dev/snd/controlC0: theron 9023 F.... pulseaudio
 /dev/snd/pcmC0D0c: theron 9023 F...m pulseaudio
CurrentDesktop: X-Cinnamon
Date: Wed Nov 25 12:02:41 2015
EcryptfsInUse: Yes
InstallationDate: Installed on 2013-10-13 (772 days ago)
InstallationMedia: Ubuntu-Server 13.04 "Raring Ringtail" - Release amd64 (20130423.1)
SourcePackage: pulseaudio
UpgradeStatus: Upgraded to trusty on 2014-05-02 (571 days ago)
dmi.bios.date: 09/14/2010
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: F.13
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: 1449
dmi.board.vendor: Hewlett-Packard
dmi.board.version: 65.2E
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnHewlett-Packard:bvrF.13:bd09/14/2010:svnHewlett-Packard:pnHPPaviliondv7NotebookPC:pvr0589110100242B10010020100:rvnHewlett-Packard:rn1449:rvr65.2E:cvnHewlett-Packard:ct10:cvrN/A:
dmi.product.name: HP Pavilion dv7 Notebook PC
dmi.product.version: 0589110100242B10010020100
dmi.sys.vendor: Hewlett-Packard