key			code
L windows		115
R windows		116
menu			117
Fn+F2 (mute)		160
Fn+F3 (vol down)	174
Fn+F4 (vol up)		176
Fn+F7 (brit down)	n/a (but still effective on Linux)
Fn+F8 (brit up)		n/a (but still effective on Linux)
i button		178
mail button		236
display switch		145