Every Key event is Key'UnknownKey

I set a callback using `setKeyCallback` function but every key press is just `Key'UnknownKey`. For instance if I press Escape the `Key` would be `Key'UnknownKey` and scancode would be 9. Any ideas why the keys are not recognized? Maybe I’m missing some dependencies like Xkb to map some layouts or something?

Begin by searching for setKeyCallback and following how scancode 9 becomes Key'UnknownKey. Done means the callback reports the expected key for Escape and other key presses; the issue names no file or test, so repository search is the first step.

Written by the indexing model from the issue text.