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Hooked up a second screen to the second connector of my nVidia card, set it up with nvidia-settings and it started showing my background correctly.

The X display works correctly (i.e. DISPLAY=:0.1 gedit works) and the cursor goes from one screen to the other but I can't grab windows to the second screen and windows on the edge doesn't appear half on one screen and half on the other.

The second monitor doesn't show in the monitor Ubuntu settings dialog.

I used to use the cube Compiz effect, but I am not interested in it anymore.

Tried rebooting. Any help appreciated, thanks very much.

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Enable Xinerama in the Nvidia settings application and reboot. When you enable "use separate x session for each monitor", you can't move windows from one monitor to the other without enabling Xinerama too. Also, when using the Nvidia drivers, do everything from the Nvidia settings application, instead of the Ubuntu "Displays" dialog.

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Worked, but lost compositing and Compiz segfaults... Any idea? Also, the resolutions dropdown in nvidia-settings lost all the options excepting Auto at one point that I can't recall. – FiloSottile Jun 14 '12 at 17:39
Try rerunning sudo nvidia-xsettings and rebooting. – reverendj1 Jun 14 '12 at 17:40
You meant nvidia-xconfig or nvidia-settings? Anyway, no luck. – FiloSottile Jun 14 '12 at 17:47
Yeah, I meant nvidia-xconfig. I'm not sure then... – reverendj1 Jun 14 '12 at 17:48… they are compatible only since X 1.10 – FiloSottile Jun 14 '12 at 23:32

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