When running Ubuntu 9.10 on a Lenovo ThinkPad T400s laptop, the internal microphone worked as expected, but the external microphone was never detected. After undergoing a distribution upgrade to Ubuntu 10.04, neither microphone works -- gnome-sound-recorder reports no sound level while recording and changing the settings in gnome-alsamixer doesn't have any discernible effect.
ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: alsa-base 1.0.22.1+dfsg-0ubuntu3
ProcVersionSignature: Ubuntu 2.6.31-20.58-generic
Uname: Linux 2.6.31-20-generic i686
AlsaVersion:
Advanced Linux Sound Architecture Driver Version 1.0.23.
Compiled on May 6 2010 for kernel 2.6.31-20-generic (SMP).
Architecture: i386
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: Intel [HDA Intel], device 0: CONEXANT Analog [CONEXANT Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: lifton 4188 F.... pulseaudio
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xf2620000 irq 31'
Mixer name : 'Conexant CX20585'
Components : 'HDA:14f15069,17aa2132,00100300'
Controls : 13
Simple ctrls : 11
Date: Wed Jun 30 14:43:44 2010
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
PackageArchitecture: all
ProcEnviron:
LANG=en_US.utf8
SHELL=/bin/bash
SelectedCard: 0 Intel HDA-Intel - HDA Intel
SourcePackage: alsa-driver
Symptom: audio
Title: [Conexant CX20585] Recording problem
dmi.bios.date: 07/27/2009
dmi.bios.vendor: LENOVO
dmi.bios.version: 6HET21WW (1.06 )
dmi.board.name: 2801CTO
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvr6HET21WW(1.06):bd07/27/2009:svnLENOVO:pn2801CTO:pvrThinkPadT400s:rvnLENOVO:rn2801CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 2801CTO
dmi.product.version: ThinkPad T400s
dmi.sys.vendor: LENOVO
This release of Ubuntu is no longer receiving maintenance updates. If this is still an issue on a maintained version of Ubuntu please let us know.