I’ve had the same problem with my monitor and just recently found a way to fix it, I have an AMD GPU though so it might be different in your case, anyway this is what I did on KDE with MangoHud and Goverlay:
- In the “System Settings” search for “Display Configuration” and set “Adaptive sync” to “Automatic”, this makes it so VRR is only active on full screen applications like games
- In Goverlay under the “Performance” tab look for the “VSYNC” section and set both vulkan and opengl to “Adaptive”
- Depending on the game you have to figure if VSync should be set on or off, (e.g. Warframe needed VSync on while in Path of Exile it didn’t seem to make a difference)
- I found that having a frame limit either in game or through MangoHud is going to break the VRR and bring back the flickering