How can i diagnose an input issue?

My system often thinks Ctrl is being held down how can i figure out what is causing this? This occurs both on Wayland and X11.

maybe this will help

xev | grep key

shows you what key is being pressed

Have you tried a different keyboard?

Is this a laptop or a desktop? If it’s a laptop check just in case for a swollen battery.

you should be asking whether they are on wayland or X11 before providing that. Do you even know whether they are on Wayland or not?