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I have 3 monitors on 2 graphics cards (both nvidia)

to get all 3 working i set 2 as twinview and one to have its own x screen.

but when i do this, the twinview screens (which previously worked like 2 seperate screens) now work as one, ie a maximised window is across both screens

How can i get the twinview to work as 2 seperate screens again?

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Can you post your config? – MaQleod Apr 27 '12 at 4:19
What drivers are you using? – Breakthrough Mar 9 '13 at 19:10
possible duplicate of Tutorial for setting up a Linux machine with 3 monitors? – Ƭᴇcʜιᴇ007 Mar 9 '13 at 20:16

I know it doesn't fully answer you, but I manage to get my three screens working with nvidia using Xinerama. Have a look at my solution here. the windows maximise as expected using openbox (ie: only one monitor), and you don't mess around with multiple screens.

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