Seems like Acer decided to go through and close all the threads talking about this, but they neglected to actually solve the problem. Telling us you're aware of the problem is not actually a solution, unfortunately. You've demonstrated the ability to fix the problem on some models, so why not do so on all models that are affected?
To answer the eventual questions: I'm on bios version 1.12. No, I don't have the bios option to disable the backlight timeout. I'm specifically requesting that functionality that doesn't exist.