xev output illustrating what appears to be a hardware bug in the keyboard of my HP ProBook 4530s. See http://unix.stackexchange.com/questions/233506/working-around-a-buggy-keyboard-hacking-an-input-stream

xev.log

KeyPress event, serial 40, synthetic NO, window 0x2600001,
    root 0x93, subw 0x0, time 63046084, (824,397), root:(828,422),
    state 0x0, keycode 32 (keysym 0x6f, o), same_screen YES,
    XLookupString gives 1 bytes: (6f) "o"
    XmbLookupString gives 1 bytes: (6f) "o"
    XFilterEvent returns: False

KeyPress event, serial 40, synthetic NO, window 0x2600001,
    root 0x93, subw 0x0, time 63046247, (824,397), root:(828,422),
    state 0x0, keycode 30 (keysym 0x75, u), same_screen YES,
    XLookupString gives 1 bytes: (75) "u"
    XmbLookupString gives 1 bytes: (75) "u"
    XFilterEvent returns: False

KeyPress event, serial 40, synthetic NO, window 0x2600001,
    root 0x93, subw 0x0, time 63046453, (824,397), root:(828,422),
    state 0x0, keycode 57 (keysym 0x6e, n), same_screen YES,
    XLookupString gives 1 bytes: (6e) "n"
    XmbLookupString gives 1 bytes: (6e) "n"
    XFilterEvent returns: False

KeyPress event, serial 40, synthetic NO, window 0x2600001,
    root 0x93, subw 0x0, time 63046456, (824,397), root:(828,422),
    state 0x0, keycode 96 (keysym 0xffc9, F12), same_screen YES,
    XLookupString gives 0 bytes: 
    XmbLookupString gives 0 bytes: 
    XFilterEvent returns: False