Ubuntu
alsa-driver package

[Lenovo IdeaPad U300s, Conexant CX20590, mic] Microphone does not pick up sound

Bug #997914 reported by Tim Pennucci on 2012-05-11

This bug report is a duplicate of: Bug #903853: [Lenovo IdeaPad U300s, Conexant CX20590, Mic, Internal] Background noise or low volume (phase inversion). Edit Remove

This bug affects 2 people

Affects		Status	Importance	Assigned to	Milestone
	alsa-driver (Ubuntu)	Confirmed	Undecided	Unassigned

Bug Description

I had this problem a week or so ago and fixed it with some patch, or some kill-switch, or something...and now it's back and I don't know how to fix it. It seems to be a popular problem with 12.04 or the drivers? I'm on a lenovo u300s...

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: alsa-base 1.0.25+dfsg-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-24.37-u300acpifix1-generic-pae 3.2.14
Uname: Linux 3.2.0-24.37-u300acpifix1-generic-pae i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 2.0.1-0ubuntu7
Architecture: i386
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: CONEXANT Analog [CONEXANT Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: tim 1842 F.... pulseaudio
Card0.Amixer.info:
Card hw:0 'PCH'/'HDA Intel PCH at 0xf7e00000 irq 49'
   Mixer name : 'Intel CougarPoint HDMI'
   Components : 'HDA:14f1506e,17aa5003,00100002 HDA:80862805,17aa5003,00100000'
   Controls : 14
   Simple ctrls : 6
Date: Fri May 11 02:22:26 2012
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release i386 (20120423)
PackageArchitecture: all
ProcEnviron:
TERM=xterm
PATH=(custom, user)
LANG=en_US.UTF-8
SHELL=/bin/bash
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: [1080, Conexant CX20590, Mic, Internal] Recording problem
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 01/09/2012
dmi.bios.vendor: LENOVO
dmi.bios.version: 56CN42WW
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: U300s
dmi.board.vendor: LENOVO
dmi.board.version: 1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Lenovo IdeaPad U300s
dmi.modalias: dmi:bvnLENOVO:bvr56CN42WW:bd01/09/2012:svnLENOVO:pn1080:pvrLenovoIdeaPadU300s:rvnLENOVO:rnU300s:rvr1.0:cvnLENOVO:ct10:cvrLenovoIdeaPadU300s:
dmi.product.name: 1080
dmi.product.version: Lenovo IdeaPad U300s
dmi.sys.vendor: LENOVO

Tags:

Revision history for this message

Tim Pennucci (ttp4tx) wrote on 2012-05-11:

AlsaDevices.txt Edit (490 bytes, text/plain; charset="utf-8")
AplayDevices.txt Edit (265 bytes, text/plain; charset="utf-8")
BootDmesg.txt Edit (53.6 KiB, text/plain; charset="utf-8")
Card0.Amixer.values.txt Edit (1.1 KiB, text/plain; charset="utf-8")
Card0.Codecs.codec.0.txt Edit (8.2 KiB, text/plain; charset="utf-8")
Card0.Codecs.codec.3.txt Edit (3.0 KiB, text/plain; charset="utf-8")
CurrentDmesg.txt Edit (1.3 KiB, text/plain; charset="utf-8")
Dependencies.txt Edit (1.9 KiB, text/plain; charset="utf-8")
PciMultimedia.txt Edit (620 bytes, text/plain; charset="utf-8")
ProcCpuinfo.txt Edit (3.7 KiB, text/plain; charset="utf-8")
PulseList.txt Edit (19.5 KiB, text/plain; charset="utf-8")

Revision history for this message

Tim Pennucci (ttp4tx) wrote on 2012-05-11:

Two comments. As of very recently I have started getting an error message on boot or waking up from suspend that says "System program problem detected." I am wondering if any of these things has to do with a recent install/upgrade kernel patch with headers to fix the suspend problem on my lenovo u300s documented here: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/904261. The kernels are here: http://zinc.canonical.com/~cking/sil/ I installed linux-image-3.2.0-24.37-u300acpifix1-generic-pae_3.2.0-24.37-u300acpifix1_i386.deb and headers (I think; hopefully that was appropriate). And now uname -r shows 3.2.0-24.37-u300acpifix1-generic-pae...

Ubuntu Foundations Team Bug Bot (crichton) on 2012-05-11

affects:

ubuntu → alsa-driver (Ubuntu)

Revision history for this message

Tim Pennucci (ttp4tx) wrote on 2012-05-13:

After further googling and tinkering, the solution I discovered is as follows:

Running gstreamer-properties showed that some Default Input plugin was "Custom" and the pipeline was something I don't remember. This didn't seem right, so I changed the plugin to ALSA and then the mic worked. However, Skype still didn't want to detect my voice. I traced this to it automatically changing the mixer levels (which can be shut off). The last tweak was to manually set one input channel to 0 with pulse volume control, and then other way up. Skype hears me again; wonderful. Now I'm left wondering, however, why everything worked seamlessly a week ago, and then out of "nowhere" the mic stopped working. Some update or install somewhere messed it all up...

Daniel Letzeisen (dtl131) on 2012-07-02

summary:

- Microphone does not pick up sound
+ [Lenovo IdeaPad U300s, Conexant CX20590, mic] Microphone does not pick
+ up sound

Revision history for this message

Launchpad Janitor (janitor) wrote on 2012-08-07:

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

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

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[Lenovo IdeaPad U300s, Conexant CX20590, mic] Microphone does not pick up sound

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alsa-driver package