I am running Ubuntu on a Chromebook, and the media keys don't work because Ubuntu treats the keyboard as a regular, generic keyboard with 105 keys.
In MATE Desktop, there is a way to change the keyboard layout (i.e. keyboard model), and so is there in KDE.
(MATE keyboard layout settings)
(KDE's keyboard layout settings)
How can I do this in GNOME?
GNOME settings offer me the option to change the layout to that of another language, but not the keyboard model.