Comment 9 for bug 1000270

This issue is still present in Saucy. I have seen it happen with many laptops, including the HP Compaq 6910p laptop on which I am typing this. It spans across multiple Ubuntu releases. My deduction is that the brightness events are processed by two different recipients which creates the problem. The aforementioned brightness_switch_enabled=N setting seems to mute one of the receivers and thus serves as a functional temporary workaround for many computers.