Conflicts using Nvidia Prime, Displaylink and Ubuntu
I would like to describe conflicts using Nvidia Prime, Displaylink and Ubuntu in my experience.
My environment: Ubuntu 18.10, Nvidia GTX 1070 (nvidia-driver-415), Displaylink 5.1, Asus MB168B+ (USB monitor), laptop Gigabyte Aero15x.
If I try to login with nvidia profile activated and anything connected in USB ports (even only a mouse), I will face a login loop. It only will stop after disconnecting all USB devices, restarting the system and then I'll be able to login into my Ubuntu. Once logged in, I can connect my USB devices and use everything included my second monitor.
If I try to login with intel profile activated. There will be no problems. Displaylink works ok.
Another interesting behavior. If I start up my laptop with all USB devices connected, of course only possible using intel profile; Displaylink will work perfectly. But if instead, during an current session I plug on my external monitor, I will always see blurry and weird definition around the mouse pointer.
If Displaylink could improve this will help lots of Linux users.