Specs:
- Fedora 43 KDE
- KDE Plasma 6.6.0 Wayland
- Legion 5 Pro 16ARX8
- RTX 4060 Max-Q (580.119.02 from RPM Fusion)
- Ryzen 7 7745HX
- Dell P2018H (external monitor, HDMI)
- BOE0B38 (laptop monitor)
- dGPU only mode (has always been like this)
I’ve just updated to KDE Plasma 6.6.0. The update is fantastic with new features, thank you devs. Everything was normal, but I started to experience random lines appearing on the edges of boxes (web contents and programs, including the terminal with translucent effect when the cursor is enlarged). It doesn’t happen on my second monitor, though. Only my laptop monitor is affected. It doesn’t happen with the external monitor unplugged. The issue wasn’t there on KDE Plasma 6.5, though.
After a while of unplugging and replugging inthe external monitor, the main monitor is somehow mirroring the 2nd monitor, which it shouldn’t, and the UI elements are everywhere. Only when I do it a few more times, the issue is resolved, but I doubt it is fixed forever.

