Macbook Pro late 2016 and 4k monitor Dell P2415Q input lag only @ HiDPI scaling

[tianen]

Originally Posted by piotrekfraacek

Update:

I've connected Dell through DisplayPort <-> USB-C cable omitting I-TEC and issue is no longer visible

So, in summary:
- DisplayLink & MacOS Mojave 10.14.1 = lag, jamming & smoothness drops
- DisplayLink & Windows 10 = everything OK
- NO DOCK STATION & MacOS Mojave 10.14.1 = everything OK

It's obvious that there is something wrong with station. Moreover, it seems that it's specifically related with macOS drivers.

I spent a lot of time doing the same tests as you, and the conclusions are the same as yours. However, the problem still exists in 2020.They do not seem to be addressing the issue or are unable to resolve it. I hope to get a reply. I am very disappointed.