[Latitude E6500, IDT 92HD71B7X, Mic, Internal] No sound at all

Internal mic does not work and is not able to capture sound.
The same used to work with Ubuntu Maverick, but is not working after updating to Natty.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: alsa-base 1.0.24+dfsg-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.38-11.48-generic 2.6.38.8
Uname: Linux 2.6.38-11-generic i686
NonfreeKernelModules: nvidia wl
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
AplayDevices:
 **** List of PLAYBACK Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
   Subdevices: 0/1
   Subdevice #0: subdevice #0
Architecture: i386
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
   Subdevices: 0/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: srikanth 1681 F.... pulseaudio
 /dev/snd/pcmC0D0c: srikanth 1681 F...m pulseaudio
 /dev/snd/pcmC0D0p: srikanth 1681 F...m pulseaudio
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xf6fdc000 irq 46'
   Mixer name : 'IDT 92HD71B7X'
   Components : 'HDA:111d76b2,1028024f,00100302 HDA:14f12c06,14f1000f,00100000'
   Controls : 15
   Simple ctrls : 10
Date: Thu Aug 25 17:19:13 2011
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_IN:en
 LANG=en_IN
 LC_MESSAGES=en_IN.UTF-8
 SHELL=/bin/bash
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaRecordingTest: ALSA recording test through plughw:Intel successful
Symptom_Card: Internal Audio - HDA Intel
Symptom_DevicesInUse:
 1681 1681 F...m pulseaudio
 : srikanth F.... pulseaudio
Symptom_Jack: Mic, Internal
Symptom_PulseAudioRecordingTest: PulseAudio recording test through plughw:Intel successful
Symptom_Type: No sound at all
Title: [Latitude E6500, IDT 92HD71B7X, Mic, Internal] No sound at all
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 05/08/2009
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A13
dmi.board.name: 0X564R
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA13:bd05/08/2009:svnDellInc.:pnLatitudeE6500:pvr:rvnDellInc.:rn0X564R:rvr:cvnDellInc.:ct8:cvr:
dmi.product.name: Latitude E6500
dmi.sys.vendor: Dell Inc.