After 2 reinstalls and 3 removals of PulseAudio, I finally got my laptop microphone to work (and stay working) with LMDE/Gnome 3 weeks ago. Whether it worked or not seemed to depend on the order of install, configure versus update.
October 8th I installed a major update pack and now I have no sound output. But, my microphone still works. I'm till using ALSA.
Given my past history, I'm 99.9% sure this is a s/w update problem. Does anyone know of a quick fix for ALSA on the Asus G1s-x1?