Selective refresh with DL under Ubuntu 14.04.5
 

I have installed the DisplayLink driver per the webpage instructions on a Dell E6220 system, with an Intel display driver. The display will work correctly sometimes (depends upon when/how it is plugged in ??), however, most of the time the display will only refresh when and where the mouse cursor updates on the display.

I did notice the following :
- Plug the monitor into the USB port
- The display will flash a couple of times.
- If the backlight stays on (display is dark gray color), the display will work correctly.
- If the backlight is off (display is black) , the refresh problem occurs.

Hope that helps.....I have attached the zip file generated from the support tool.