This is a rough one. Waynergy is the Wayland-compatible replacement for
synergy. As far as I can tell it works largely on black magic.
For whatever reason, Waynergy doesn't handle keycodes the same way
Synergy/Barrier do. It uses raw codes as sent by the server. These codes
can exceed the X cap of 318, resulting in keys being ignored in XWayland
sessions.
The dev's recommended path to keyboard support is to use a custom xkb
keymap and I guess just shrug at the dropped keys over 318. My method
uses the stock evdev xkb keymap and instead uses raw keycodes to swap
out-of-band keys to their expected keycodes.
The warning the dev gives is this is brittle and won't work on any other
OS, or possibly keyboard/box. I don't care.
