The game seems to play fine on Linux (Ubuntu 17.04), except for two things:

1) Alt-tabbing out and back causes the game to hang, with the music still playing
2) (more important) The dialog text is never displayed, so cutscenes show blank areas where the dialog should appear, and talking to anybody in-game does the same thing.

I'm using the open-source Nouveau drivers and don't want to switch to the proprietary NVidia driver, but will try it. Is this a known issue?