I was fooling around with AGS, and compiled v3.3.0.1162 (from here: https://github.com/adventuregamestudio/ags).

The sound issue is due to this bug in Allegro 4.2:
https://bugs.launchpad.net/ubuntu/+s....2/+bug/445945

It seems that if we could get a later 4.2 version compiled, or compile libaldmb1 against 4.4, we could get sound working in AGS. There's still the issue of not being able to exit easily from fullscreen, but windowed mode seems to work alright.

I've been testing with Heroine's Quest. The file is too big to attach unfortunately...