Key not recognised by SDL

Hello there,

the message reported from SDL2 is:

The key you just pressed is not recognized by SDL. To help get this fixed, please report this to the SDL mailing list sdl@libsdl.org X11 KeyCode 151 (143), X11 KeySym 0x1008FF2B (XF86WakeUp).

The key I pressed was the Fn key (lower left corner) on a Lenovo Thinkpad P50, running Linux Mint 18.1, while developing and testing a simple 2D game.

Thanks,

-Antonio

The key you just pressed is not recognized by SDL. To help get this fixed, please report this to the SDL forums/mailing list https://discourse.libsdl.org/ X11 KeyCode 151 (143), X11 KeySym 0x1008FF2B (XF86WakeUp).
The key i pressed was “Pause”.

SDL2. Application: Mednafen 1.21.3. Linux Mint 19 Xfce 64 bit.

Lenovo E14:
X11 KeyCode 151 (143), X11 KeySym 0x1008FF2B (XF86WakeUp).

Key pressed was “Fn”

On Debian10’s /lib/x86_64-linux-gnu/libSDL2-2.0.so.0.9.0

[server] WARN: Could not inject char u+00b0
The key you just pressed is not recognized by SDL. To help get this fixed, please report this to the SDL forums/mailing list https://discourse.libsdl.org/ X11 KeyCode 199 (191), X11 KeySym 0x1008FFA9 (XF86TouchpadToggle).

It was the “Fn” key while in scrcpy, exploring the application