linux 下 nvidia 显卡双屏幕设置

这个被nvidia称为TwinView, 其设置方法是在Section "Screen"里加入
Option "TwinView" "True"
之后是Option "MetaModes" "nvidia-auto-select, nvidia-auto-select" (这个也可以用nvidia-settings设置）

这样就启动了TwinView, 不过这时两个屏幕是拼接的关系。我这次是要接投影仪，因此需要两个屏幕显示一致，因此还要加上
Option "TwinVieworientation" "Clone"

之后重启X即可。

nvidia驱动的文档写得很清楚，我看了2分钟就搞明白了。

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