KeyRelease event, serial 32, synthetic NO, window 0x5200001,
    root 0x58, subw 0x0, time 3308265918, (-339,228), root:(507,276),
    state 0x0, keycode 243 (keysym 0x0, NoSymbol), same_screen YES,
    XLookupString gives 0 bytes: 
    XFilterEvent returns: False