Public bug reported:

Neither the internal microphone nor a mic plugged into the microphone
port work.  Sound output works through both the built-in speakers as
well as the headphone port.

ProblemType: Bug
Architecture: i386
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
   Subdevices: 1/2
   Subdevice #0: subdevice #0
   Subdevice #1: subdevice #1
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  ubuntu     2000 F.... pulseaudio
 /dev/snd/pcmC0D0c:   ubuntu     2000 F...m pulseaudio
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xf6ffc000 irq 21'
   Mixer name   : 'IDT 92HD81B1C5'
   Components   : 'HDA:111d76d5,102802ef,00100402'
   Controls      : 31
   Simple ctrls  : 18
Card1.Amixer.info:
 Card hw:1 'HDMI'/'HDA ATI HDMI at 0xf6dec000 irq 17'
   Mixer name   : 'ATI R6xx HDMI'
   Components   : 'HDA:1002aa01,00aa0100,00100100'
   Controls      : 4
   Simple ctrls  : 1
Card1.Amixer.values:
 Simple mixer control 'IEC958',0
   Capabilities: pswitch pswitch-joined
   Playback channels: Mono
   Mono: Playback [off]
CheckboxCommand: alsa_record_playback
CheckboxDescription:
 Disconnect any external microphones that you have plugged in.  Click the Test 
button, then speak into your internal microphone.  After a few seconds, your 
speech will be played back to you.
 
 Did you hear your speech played back?
CheckboxTest: alsa_record_playback_internal
Date: Mon Feb  8 18:20:27 2010
DistroRelease: Ubuntu 9.10
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
NonfreeKernelModules: fglrx wl
Package: alsa-base 1.0.20+dfsg-1ubuntu5
PackageArchitecture: all
ProcEnviron:
 SHELL=/bin/bash
 LANG=en_US.UTF-8
ProcVersionSignature: Ubuntu 2.6.31-19.56-generic
SourcePackage: alsa-driver
Tags: checkbox-bug
Uname: Linux 2.6.31-19-generic i686
XsessionErrors:
 (gnome-settings-daemon:2032): GLib-CRITICAL **: g_propagate_error: assertion 
`src != NULL' failed
 (gnome-settings-daemon:2032): GLib-CRITICAL **: g_propagate_error: assertion 
`src != NULL' failed
 (nautilus:2189): Eel-CRITICAL **: eel_preferences_get_boolean: assertion 
`preferences_is_initialized ()' failed
 (polkit-gnome-authentication-agent-1:2230): GLib-CRITICAL **: 
g_once_init_leave: assertion `initialization_value != 0' failed

** Affects: alsa-driver (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug checkbox-bug i386 pcert

-- 
Microphone doesn't work on Dell Precision M6500
https://bugs.launchpad.net/bugs/519066
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