Ubuntu 20.04 with KDE is laggy on 4k monitor

performance multiple-monitors nvidia kde 4k-monitor

If anyone also encounters this problem: I was not able to fix it. It seems that there is a bug when using an NVIDIA graphics card with Aurorae window decorations.

I've noticed that I only had issues when I was using literally any other theme in KDE plasma than Breeze or Breeze dark. So I simply switched to using Breeze and now everything's working great.

Related

Place the activites bar and the favorites bar on the same monitor
Remove next line after specific character
pgadmin III doesn't work due to "The server lacks instrumentation functions."
Enter recovery mode in headless ubuntu setup?
Ubuntu Desktop 20.04: Prevent the display from turning off when locking screen
Installing software to specific locations?
Unlock a logfile locked by another process linux
Is there an application that can tell you what DLL's and other dependencies a program uses?
Edge is no longer in the background apps list
Windows 7 low and critical battery levels cannot be set lower than 10%
How do I change the Respond To for Group Email adresses in Notes 6.5
Prevent applications from adding to start screen on install