Help! My Fedora 42 KDE Monitor Keeps Flickering After Login

It sounds like you might be dealing with an Nvidia driver issue, especially if you just installed those. Some older Nvidia GPUs have compatibility problems with Wayland, which is the display protocol that might be active on your system now. Try switching to the X11 display protocol instead. You can do that by looking for "SDDM" under the settings and change the session to X11. After that, just reboot and see if it helps! To check your current session type, run `echo $XDG_SESSION_TYPE` in the terminal.

Have you tried turning off HDR? I had a black screen issue after I turned it on when I first installed Fedora. I managed to fix that by disabling HDR from the terminal while at the login screen. If you haven't done this yet, it might be worth a shot!

Hey, I'm still figuring out Linux too, but I had a similar issue when I switched to Linux Mint. Make sure your Nvidia drivers are set up correctly. You can use the command `inxi -g` to check if your drivers are active. If it shows 'n/a' or 'none', that means they're not activated. You might need to disable secure boot in your BIOS or create a MOK key for your drivers. Not sure about the exact commands, but there's plenty of info online to help you with that.