Ubuntu doesn't seem to recognize the graphics card on my new Samsung rv515. In desktop preferences I cannot chose widescreen resolution (or any alternative resolutions, actually). I saw some supposed solutions posted online, but I cannot use the descriptions because they're written in pure Ubuntu-slang. I need a step-by-step guide, for a Ubuntu newbie.
If you are using a version of Ubuntu higher than 10.10 (11.04, or 11.10), you are likely running Unity.
To install the drivers for your graphics card, type "drivers" in the Dash, and the "Additional Drivers" icon should show up. Click that, and you should get a window that is somewhat like this: