In my TV, UDOO x86 display area is bigger than the screen, making some lines in the console invisible.
The first thing you should try, especially with Samsung TV's, is the Picture Option settings on the TV. There should be a setting for Picture Size which can be set to "auto" or "scan" to use the HDMI output values to determine the display resolution. If that doesn't work it would help others to know which OS you are running.
Following John's advise I have it resolved. However, this is not the way I resolve it when using Raspberry Pi. Rpi have overscan settings when booting up. So I didn't need to worry about it.