[ubuntu] Unlock Max Monitor Resolution

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http://ubuntuforums.org – I used to use Rivatuner to create a custom driver inf on Windows so that my Dell e722p would run at a higher resolution than the driver allows it to by default. The monitor was fine with that, as someone, somewhere, said it would be. Windows is long gone anyway after finally jumping to linux for good. Does anyone know of a way I can achieve similar functionality on Ubuntu and get my monitor to display more than 1152x864? It's locked as this in the settings, by the driver, and oddly, is displayed as a 15" monitor, which it is not... (Hardware)