I bought a new Samsung monitor and booted into Linux and the display was horrible (extremely bright and poor contrast). I tried to change settings but I was not satisfied with the ouput. I then booted back into windows and used Samsung's Magictune and the display was excellent. I booted back into LInux and the display is a mess again. I believe this could be with the X subsystem but I don't know the fundamentals to tweak X. Can someone provide the high-level guidelines to troubleshoot this issue.
I run openSuse with XFCE. External monitor : Samsung 22''