My Brother MFC-j470DW printer produces poor color prints from my Linux desktop, which is running Ubuntu release 14.04. Furthermore, the contrast and brightness adjustments on image viewer interface have absolutely no effect on the copy that comes out of the printer, or, for that matter, even on the image that appears in the viewer window on my screen. The drivers were installed from the Brother website, and the printer seems to work ok otherwise. Using the printer copy function produces reasonable copies, which can be made even better by selecting high density from the printer menu. Also the printer test page comes out good with high contrast and saturated colors. So the problem appears to be in the software, which is not allowing me to adjust brightness/contrast.