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I'm using 3 monitors in 12.04 under Unity without a hitch! Then again, I'm using 1 ATI video card (with 3 outputs) and the proprietary ATI driver.

Unity has great support for multiple-monitors. Many, if not most, of the problems are due to: X, the video card drivers and Xinerama.



Yep...in case anyone comes back to this thread, I purchase an AMD Sapphire Radeon FLEX HD 6770 1GB DDR5 PCIe 2.1, and Unity works perfectly across all three now using the proprietary drivers, and setting the "Multi-display desktop" option for each monitor in the amdcccle utility.


Huh. Then I'll give it a try.

I always disabled Unity until now, precisely for the reason that it didn't work for me on this laptop that is often docked with 2 monitors.




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