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I have 2 videocards a quadro FX 380 and a Geforce 580. I want to connect 2 1920x1200 and a 2560x2540 screen to it. I use precise and the xswat PPA with newest nvidia proprietary drivers.

The built-in Ubuntu Display Tool just gives me an option to configure 2 screens on the same card. If I use the nvidia tool it sees all screens and I can turn on the third display (on the second videocard). I don't have an option to "twinview" this display. I just can configure a new xscreen (twinview is greyed out).

This works but lightdm doesn't feel responsible for that screen. It's just white and a simple xserver with typical "x" mouse pointer. The other 2 displays work as expected.

There are so many contradicting posts. Some say lightdm can't handle 2 xsreens. Is this still the case? What am I doing wrong. Do I need to use another window manager?

Thank you for your time.

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