Trackpad not responsive when MB connected to an external device

After I installed Maverick on my MP retina, every time I connected my smartphone the screen freezes and the trackpad is not responsive anymore. Never happened before. What shall I do? Reinstall Lion? Thanks.

The higher resolution is pushing you to the next higher rendering resolution.  If you are in Develop and set zoom position to 1:4 or 1:8 it should speed back up (each level is 4 times as fast as tge previous).

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