Comment 42 for bug 810093

waldemar.yan: I'm pretty sure that something is wrong with your workaround. This shouldn't work. By unloading the samsung-laptop module you can't change the backlight without direct hw access. You must have loaded some (other none default?) module for this. Please post your lsmod output.

For a real workaround use vorias ppa #26. It contains a real fix, that still isn't in kernel.

btw: you can blacklist a module, instead of unloading it on boot...