Is there a way to define an association of a particular physical key of the keyboard to some action, independently of the letter that this key is associated to in any layout?
Example: In most default Gnome shortcut key associations, pressing Alt + Ctrl + T opens a terminal. But only in the Latin keyboard layout. Doing the same physical action while in Greek layout does not work, since the associated letter is then the "Greek T", not the "Latin T".
Therefore, one has first to switch to the Latin layout and then press the shortcut key, which may be frustrating since one is never sure if the key has not been pressed correctly at the first place, so probably tries several times until realizing that the problem was in the layout.
A solution could be defining the same association for the same key in all layouts one uses - but then one would have to do this for all shortcuts, so this solution does not scale well.