Comment 2 for bug 369460

I experienced the same problem With Skype, Audacity and basically all applications that use a microphone ; here is a fix that does not make sense but works to re-establish microphone on jaunty 64 bits X2 with hda Intel built in motherboard sound device ; I am not even sure that once this setting is made it will be possible to recover it on next session :
- no way to use Kmix that has no microphone input (bug),
- Aumix shows a microphone setting but is not usable as a fix,
- The only possibility is to use the sound setting manager of Gnome called Gnome-volume-control (even possible under KDE) and apply this crazy setting (other ones of same madness may work) : I have attached a zip file for all settings of Gnome sound settings, skype and audacity as tested on my machine conducted with Ubuntu Alsa package and PulseAudio installed.

Sound worked perfectly well on pre-Jaunty ; apparently it is not an Alsa problem as even after re-compiling Alsa 1.0.20 It did not work any better for the microphone (maybe I did not complete the job) ; it may have to be with interface between PulseAudio and Alsa.

Hope this will be fixed on next update.
Regards.