Linux nVidia TwinView Malfunctions

[spledger]

On an nVidia card under linux when using the nVidia drivers, if one has a dual-monitor setup, the game takes control of both monitors and displays precisely in the center of them, resulting in extremely delayed mouse movements (since these are handled by OpenGL), and making the windowed mode the only option to play the game.

[historic_bruno]

#1790, #1863, #1905 duplicated this report. SDL 2.0 apparently has multimonitor support, so we'll see how that works when it's released over the next few months.