"Regressions" in OS X break DisplayLink screens and only Apple can fix them.    



From ArsTechnica:

The first thing I noticed upon installing Mavericks on my Mac mini is that mouse movement on my second monitor was suddenly choppy. Instead of the mouse cursor moving smoothly across the screen as it does on my primary display, it travels in a jerking motion on my USB-powered monitor that relies on a DisplayLink driver.

Updating to a beta version of the DisplayLink driver that supports Mavericks didn't change anything. It turns out I'm not alone—and my troubles are mild compared to those experienced by other users.

  OS X Mavericks breaks multi-monitor setups with some USB displays