[Lenovo G570, Conexant CX20590, Mic, Internal] Recording does not work

Bug #1033011 reported by Rakshith Begane on 2012-08-04
This bug affects 6 people
Affects Status Importance Assigned to Milestone
alsa-driver (Ubuntu)

Bug Description

mic does not work

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: alsa-base 1.0.25+dfsg-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-24.39-generic 3.2.16
Uname: Linux 3.2.0-24-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 2.0.1-0ubuntu8
Architecture: amd64
 **** List of CAPTURE Hardware Devices ****
 card 0: PCH [HDA Intel PCH], device 0: CONEXANT Analog [CONEXANT Analog]
   Subdevices: 0/1
   Subdevice #0: subdevice #0
 /dev/snd/controlC0: rakshith 2274 F.... pulseaudio
 /dev/snd/pcmC0D0c: rakshith 2274 F...m pulseaudio
 Card hw:0 'PCH'/'HDA Intel PCH at 0xd0600000 irq 43'
   Mixer name : 'Intel CougarPoint HDMI'
   Components : 'HDA:14f1506e,17aac013,00100000 HDA:80862805,80860101,00100000'
   Controls : 14
   Simple ctrls : 6
Date: Sat Aug 4 20:36:48 2012
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
PackageArchitecture: all
 PATH=(custom, no user)
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaRecordingTest: ALSA recording test through plughw:PCH failed
Symptom_Card: Built-in Audio - HDA Intel PCH
Symptom_Jack: Mic, Internal
Symptom_Type: None of the above
Title: [20079, Conexant CX20590, Mic, Internal] Recording problem
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 05/23/2011
dmi.bios.vendor: LENOVO
dmi.bios.version: 40CN08WW(V2.07)
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: Base Board Product Name
dmi.board.vendor: LENOVO
dmi.board.version: Base Board Version
dmi.chassis.asset.tag: Chassis Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: Chassis Manufacturer
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnLENOVO:bvr40CN08WW(V2.07):bd05/23/2011:svnLENOVO:pn20079:pvrLenovoG570:rvnLENOVO:rnBaseBoardProductName:rvrBaseBoardVersion:cvnChassisManufacturer:ct10:cvrChassisVersion:
dmi.product.name: 20079
dmi.product.version: Lenovo G570
dmi.sys.vendor: LENOVO

Rakshith Begane (raxith) wrote :
summary: - [20079, Conexant CX20590, Mic, Internal] Recording problem
+ [Lenovo G570, Conexant CX20590, Mic, Internal] Recording does not work
Launchpad Janitor (janitor) wrote :

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

Changed in alsa-driver (Ubuntu):
status: New → Confirmed

Please make sure you do not have an inverted microphone by following the instructions in this bug: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1002978

I am also facing this issue. The notebook is a Lenovo G470, but the hardware is basically the same, including the sound card. The microphone does not work on Skype nor on gnome-sound-recorder. I am using Ubuntu 12.04 64-bit version here.

I installed https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1002978/+attachment/3200653/+files/alsa-hda-dkms_0.1_all.deb , which made the microphone work on Skype, but then the output sound became really noisy and polluted and I decided to uninstall it (the sound was noisy only on Skype).

I have also followed the instructions on bug 1002978 and certified that the problem is an inverted microphone.


Reading the change log of v3.2.32-precise, it said something like this,

ALSA: hda - Fix internal mic for Lenovo Ideapad U300s
ALSA: HDA: Add inverted internal mic quirk for Lenovo S205


It sounds like something is being done to fix the Conexant CX20590 HD Audio CODEC integrated microphone bug, but when I just tested it with Skype 4.0, the microphone still doesn't work.
I used Lenovo G570 (Intel platform) for testing.



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