External display with closed laptop
I'm using a Lenovo dock with an xps 13 9343 running Ubuntu 16.04 to an external monitor connected with DVI, and with the lastest driver works fine. The problem arrive when I try to use the laptop with the screen closed, for working only with the external display. As soon as I close the lid begins to slow down the system, 5 seconds to open any window, but if I open the lid of the laptop and I enable it, the system starts to run well
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