Hi
After doing an upgrade to the 530 driver, I encounter the same problem as you. However, since i’ve added the following kernel boot parameter, the flickering seems to be gone.
nvidia_drm.modeset=1
Without that, opening a text editor, a web browser, scrolling a web page or even watching a video, my monitor flicker 2 or 3 time every minutes (or two if i’m lucky).
But since i’ve added this to grub my monitor doesn’t flicker anymore.
Maybe, for those who encounter this weird thing, you can try that.
GPU : RTX 2080
120hz gsync monitor
OS : Debian unstable with 530-41-03 driver from experimental repo.
English is not my native language. Sorry for grammatical mistakes.