That is the nature of USB.. it uses a lot of CPU power.
Quote:
Originally Posted by PhoenixRebourne
I'm not sure how helpful this is. I can get the DisplayLink adapter plugged in and have it be black, but I can get my other displays to display like normal. When I do this SystemUIServer is constantly consuming 1.2% of my CPU, and my Mac get's pretty hot. As soon as I unplug it, it drops down to 0%, where it probably should be, and the fans turn off as the computer quickly cools down.
To replicate:
I have a Thunderbolt-to-DVI adapter that came with my Mac and a USB-to-DVI adapter from DisplayLink. Begin with nothing plugged in. Plug in the Thunderbolt display. Plug in the DisplayLink adapter. Unplug and then replug the Thunderbolt adapter.
Maybe this has already been posted / discovered, but I thought I might as well mention it in case it hadn't.
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