Multi monitor setup problem - 3 displays (2 monitors + 1 TV)

I have difficulties configuring a multimonitor setup in Ubuntu that contains 3 displays.

I have a PC with a NVIDIA Geforce GTX 550ti graphics card that has 3 outputs: 1 mini HDMI, 2 DVI. I run the NVIDIA display driver version 375.66 (if that helps somehow).

I now have two monitors that I want to use alongside. One monitor is the main, the other one is the extension of monitor one. That works well, but when I want to include my TV in this monitor setup I can either use

• TV and monitor 1 or
• monitor 1 + 2

but not all three devices.

My goal is to use

• monitor 1 + 2 alongside and
• mirror monitor 1 with my TV.

Is there any way this can be done?

Thanks in advance!

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