I have a 2018 MBP running 10.14.3 -- it's connected to a dock with 3 external monitors. Two are through display port and one through HDMI. The dock connects via USB-C.
I have one monitor that's rotated 90 degrees. On this monitor, if I have a full-screen application, the UI of that application lags immensely. I've tested multiple applications. If I drag the full screen application to my other external monitor (both are DP), the UI is snappy as expected. Both monitors are the same model. As far as I can tell, the only difference is that one monitor is rotated 90 degrees and the other isn't.
Is there anything I can try to resolve this? Some Notes:
- The dock has updated drivers (third party displaylink)
- I've tried rebooting
- It doesn't seem to happen for the entire application
- For Outlook, the mouse is very responsive in the reading pane, but lags when I hover over my folders.
- For Slack, the entire UI is laggy