Comment 23 for bug 1381625

So if you run into that situation, discovering that this is configurable and changing the configuration seems equally hard (or harder). I can understand the heuristics what was done upstream in gnome-settings-daemon (see linked bug) to generally clam the brightness to >= 1 if there are many steps. That will work without configuration, does not need to be discovered, and keeps the path open for a better fix in the future as this doesn't set/affect any user config or other permanent state on disk. We could use that approach in unity-settings-daemon too?