Public bug reported:

model is pavillion dv4 1114nr - the internal mic never worked at all for me on 
8.10 or 9.04.
this is with 32bit karmic

so the system testing seems pretty buggy overall, but particularly the
internal mic test was invalid. I found under sound settings that the mic
was muted by default (why?). after unmutting it the sound level meter in
the sound setting window did register noise, but in the testing area no
playback ever occurred. sound recorder was able to record and playback
with no problem. and latest skype beta works with default settings
though mic level needs turned up. unable to test empathy/pidgin.

ProblemType: Bug
Architecture: i386
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
   Subdevices: 2/2
   Subdevice #0: subdevice #0
   Subdevice #1: subdevice #1
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  aaron      1849 F.... pulseaudio
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xda500000 irq 32'
   Mixer name   : 'Intel G45 DEVCTG'
   Components   : 'HDA:111d76b2,103c30f7,00100302 
HDA:11c11040,103c137e,00100200 HDA:80862802,80860101,00100000'
   Controls      : 30
   Simple ctrls  : 17
CheckboxCommand: alsa_record_playback
CheckboxTest: alsa_record_playback_internal
Date: Thu Oct 15 09:39:48 2009
DistroRelease: Ubuntu 9.10
Package: alsa-base 1.0.20+dfsg-1ubuntu5
PackageArchitecture: all
ProcEnviron:
 SHELL=/bin/bash
 LANG=en_US.UTF-8
ProcVersionSignature: Ubuntu 2.6.31-14.46-generic
SourcePackage: alsa-driver
Tags: checkbox-bug
Uname: Linux 2.6.31-14-generic i686
XsessionErrors:
 (gnome-settings-daemon:1864): GLib-CRITICAL **: g_propagate_error: assertion 
`src != NULL' failed
 (gnome-settings-daemon:1864): GLib-CRITICAL **: g_propagate_error: assertion 
`src != NULL' failed
 (polkit-gnome-authentication-agent-1:1983): GLib-CRITICAL **: 
g_once_init_leave: assertion `initialization_value != 0' failed
 (nautilus:1959): Eel-CRITICAL **: eel_preferences_get_boolean: assertion 
`preferences_is_initialized ()' failed
 (Do:1974): Wnck-CRITICAL **: wnck_set_client_type got called multiple times.

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


** Tags: apport-bug checkbox-bug i386

-- 
system testing fails with working internal mic - hp dv4
https://bugs.launchpad.net/bugs/452236
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