I recently got a new laptop, the Inspiron n5110.  It works fine except that I cannot disable the auto dimming for the screen.  I have it on max brightness, and then I switch over to a darker program, and the screen slowly dims.  When I switch over to a white program, the screen slowly brightens.  This is a problem at night when I want to have a uniform brightness with both white and black pages, as I am constantly switching between the two.  Is there a solution to this?

I have already tried to set the power options to max performance, changed the "Adaptave brightness" feature to off, I made everything max performance in the dell graphics program too.  Nothing is working for me.