https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/commit/sound/pci/hda/patch_realtek.c?id=73bdd597823e2231dc882577dbbaf8df92fe1775
you need to use debug version of alsa driver to check the system log to find out whether your codec alc292 can automatcally differentiate headset and headphone as your thinkpad does not support conventional mic http://voices.canonical.com/david.henningsson/2014/03/07/headset-jacks- on-newer-laptops/ -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to alsa-driver in Ubuntu. https://bugs.launchpad.net/bugs/1414706 Title: [20ALCTO1WW, Realtek ALC292, Black Mic, Left][Lenovo ThinkPad X240] external mic has no sound at all Status in HWE Next Project: Incomplete Status in alsa-driver package in Ubuntu: Confirmed Bug description: During this test, an error dialog was thrown, reading: The following mixer control(s) might be incorrectly set: Mic is at 0.0% Mic is muted Please try to fix that (e g by running "alsamixer -D hw:PCH" in a terminal) and see if that solves the problem. Would you like to continue troubleshooting anyway? However, the System Settings... -> Sound UI shows the mic as not muted. When I tried running the alsamixer command, I saw mic and mic- boost were both showing 0; I cranked them up to 100, but it made no difference. I also tried re-running this command with the mic/mic- boost still set to 100 and it threw the same error. 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: 2.14.1-0ubuntu3.6 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: doctorow 2636 F.... pulseaudio /dev/snd/pcmC1D0c: doctorow 2636 F...m pulseaudio /dev/snd/pcmC1D0p: doctorow 2636 F...m pulseaudio /dev/snd/controlC0: doctorow 2636 F.... pulseaudio CurrentDesktop: Unity Date: Mon Jan 26 16:20:49 2015 InstallationDate: Installed on 2014-09-10 (138 days ago) InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2) PackageArchitecture: all SourcePackage: alsa-driver Symptom: audio Symptom_AlsaRecordingTest: ALSA recording test through plughw:PCH failed Symptom_AlsaRecordingTestStderr: a r e c o r d : p c m _ r e a d : 2 0 3 1 : r e a d e r r o r : I n p u t / o u t p u t e r r o r Symptom_Card: Built-in Audio - HDA Intel PCH Symptom_DevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: doctorow 2636 F.... pulseaudio /dev/snd/pcmC1D0c: doctorow 2636 F...m pulseaudio /dev/snd/pcmC1D0p: doctorow 2636 F...m pulseaudio /dev/snd/controlC0: doctorow 2636 F.... pulseaudio Symptom_Jack: Black Mic, Left Symptom_Type: No sound at all Title: [20ALCTO1WW, Realtek ALC292, Black Mic, Left] No sound at all UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 06/24/2014 dmi.bios.vendor: LENOVO dmi.bios.version: GIET75WW (2.25 ) dmi.board.asset.tag: Not Available dmi.board.name: 20ALCTO1WW dmi.board.vendor: LENOVO dmi.board.version: 0B98401 PRO dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvrGIET75WW(2.25):bd06/24/2014:svnLENOVO:pn20ALCTO1WW:pvrThinkPadX240:rvnLENOVO:rn20ALCTO1WW:rvr0B98401PRO:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 20ALCTO1WW dmi.product.version: ThinkPad X240 dmi.sys.vendor: LENOVO mtime.conffile..etc.modprobe.d.alsa.base.conf: 2015-01-22T13:36:22.741441 To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1414706/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
