Microphone not working : HP Touchsmart IQ522 : Codec: Analog Devices AD1984A

Hi,

I'm running Ubuntu on a HP Touchsmart IQ522, following http://doc.ubuntu-fr.org/hp_touchsmart
after adding "options snd-hda-intel model=mobile", the sound is working, but I can't get the mic to work.

I've tried the other models : desktop,laptop,thinkpad... no result

I've noticed that every time I open the gnome-volume-control all the microphones are muted.

ProblemType: Bug
AplayDevices:
 **** Liste des PLAYBACK périphériques ****
 carte 0: Intel [HDA Intel], périphérique 0 : AD198x Analog [AD198x Analog]
   Sous-périphériques: 1/1
   Sous-périphérique: #0: subdevice #0
Architecture: amd64
ArecordDevices:
 **** Liste des CAPTURE périphériques ****
 carte 0: Intel [HDA Intel], périphérique 0 : AD198x Analog [AD198x Analog]
   Sous-périphériques: 2/2
   Sous-périphérique: #0: subdevice #0
   Sous-périphérique: #1: subdevice #1
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: miguel 15520 F.... mixer_applet2
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xf9bf8000 irq 22'
   Mixer name : 'Analog Devices AD1984A'
   Components : 'HDA:11d4194a,103c2a82,00100400'
   Controls : 11
   Simple ctrls : 7
DistroRelease: Ubuntu 9.04
NonfreeKernelModules: nvidia
Package: alsa-base 1.0.18.dfsg-1ubuntu8
PackageArchitecture: all
ProcEnviron:
 LANG=fr_CH.UTF-8
 SHELL=/bin/bash
SourcePackage: alsa-driver
Uname: Linux 2.6.28-14-generic x86_64