[ltp] T440s keyboard events F9-F12

[Joost]

Hello everybody,

I recently acquired a T440s, which works generally well.

Right now I am trying to get the function keys on F9-F12 working.
Xev gives no response; on input-events 5 (device "Thinkpad Extra Buttons") I 
get:

...
EV_MSC MSC_SCAN 28
EV_KEY KEY_UNKNOWN (0xf0)pressed
EV_SYN code=0 value=0
...

The MSC_SCAN code ranges from 28 (F9) to 31 (F12).

Does anyone know how can I map those to keycodes?

Thanks for any help,

Joost