I am experiencing annoying automatic backlight brightness changes under ubuntu 12.04 LTS on my Dell XPS ultrabook.
It seems to be connected to the amount of white pixels on the screen (switching back an forth between dark/light application windows makes the effect noticable, but also just scrolling through a website.) So I think it is the dynamic contrast feature of the notebook screen.
How do I turn this off in Ubuntu? Windows offers specific Intel driver options for this, but I can't find any for Ubuntu.
Model: Dell XPS 14 Ultrabook and currently running Unity