Text and HDMI issue (Zorin 18.1 Core, Macbook Pro 10,1 Nvidia 650M/intel 4000)

Maybe you can get some ideas in this thread and the links there:

But we were groping in the dark to search for solutions which still work...
I'm not familar with multi-monitor problems.

You could try it with the dtl131 ppa mentioned in the LM thread or with the option two of the ubuntu handbook link.

Does it work if you connect only one monitor? Does the problem occur only when using multiple monitors?

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