We really need symbols, compat, keynames, vmods and types for a sensible keymap.

Try this in your xorg.conf.d snippets for all keyboards:
        Option "XkbLayout" "us"
        Option "XkbVariant" "nodeadkeys"

us(nodeadkeys) doesn't exist so xkbcomp provides everything but the symbols
map. We say we want everything but don't _need_ anything, the server happily
gives us a keymap with every key mapped to NoSymbol. This in turn isn't what
we want after all.

So instead, require symbols, compat, keynames, vmods and types from the
keymap and if that fails, load the default keymap instead. If that fails
too, all bets are off.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Dan Nicholson <dbn.lists@gmail.com>