Xrandr might be an option but I'm not sure as I don't have a physical machine running Stable, mine's on virtualbox in 3.7.x beta.
As a matter of fact you might want to test your printer(s) on beta too ..... that would be very helpful. I can PM you the download link (32 and 64bit) if you feel like running some tests on that.
They are stable enough only the desktop is very different, for now.
You can try the command `"xrandr --output default --brightness 1.0" to set the screen to max brightness, as a test. I have my doubts though. 
Maybe some of the others know how to manage a Dell. 
bump @Thanatermesis (for adding the .debs to repo too 
) @Rebel450 @yoda or @LupusE 
