Very Slow performance on external monitors

[Carlo]

Originally Posted by kingwilly811

Thanks for the replies. The screen resolution I am using on my externals is 1920 x 1080 for both. I have used a lower resolution and it helps slightly but very slightly.

A couple example cases would be: dragging windows, animations for closing/opening apps, mouse lag, choppy watching video, and choppy streaming content (crystal clear on same wifi undocked). Honestly though it's pretty much all things. I'd say performance undocked is 2x what I get when docked.

Thank you for the information,

For just moving windows around at 1080p it may be a bit slow, but not to the point of being annoying.
So there may be something wrong.

To double check can you please see if the CPU usage is OK when nothing is updating?
Connect both screens but without video on them.
Open Activity Monitor and go to the CPU tab. Bring Activity Monitor to the Mac's internal screen, not on DisplayLink screens.

First of all, sort by % CPU to see if there is anything unexpected (like anything >50% CPU).
Then, sort by Process Name and look for DisplayLinkUserAgent and DisplayLinkManager. These should be between 0% and 5% if nothing is updating on the screens.

Let me know if anything is not as expected.

Thank you very much for your help!

Cheers,
Carlo