I must correct me. Xev receives an event, but it has no symbol assigned to the key:
KeyRelease event, serial 25, synthetic NO, window 0x2c00001,
root 0x8d, subw 0x0, time 33601052, (658,361), root:(664,426),
state 0x10, keycode 94 (keysym 0x0, NoSymbol), same_screen YES,
XLookupString gives 0 bytes: ""
