Oh my goodness, I'm sorry to hear that this is happening to others but I am so glad its not just me. This has been something that's driving me crazy, because I knew it wasn't a cable / GPU issue due to the fact that it doesn't occur in Windows.
Whether I use Wayland or X11, I just get random flickers at the top - doesn't seem to be caused by any specific application either, nor is it isolated to any specific DE (I've gotten it on both GNOME and KDE).
I'm on an RTX 2080, with driver version 535.98 - I'd love to just "use an AMD card" but short of one just falling out of the skies right into my hands, that's not going to be happening anytime soon sadly.
Edit: From OP's link to Nvidia's forums, someone did mention that setting the GPU's power mode to Performance somewhat mitigates the issue. This can be set by opening the Nvidia X Server Settings app (or sudo nvidia-settings
) and under your GPU -> PowerMizer -> Preferred Mode. I've just set this now, I guess we'll see how that goes - but do expect power usage to probably go up by doing this.
Edit 2: Annnnd that didn't work...