I am on elementaryOS (which is based on Ubuntu 16.04.3 LTS). After latest kernel update, key repeat stopped working. I mean the behaviour which types 'ffffffff' when I hold the 'f' key. I discovered, using xev, that my system is registering key presses constantly, even when I do not press, move or touch anything at all. I am also not able to login into a tty, because it types in '^@' into my login and password every second or so. xev reports this event:
KeyPress event, serial 37, synthetic NO, window 0x3e00001, root 0x2c8, subw 0x0, time 161832, (322,168), root:(1193,635), state 0x0, keycode 221 (keysym 0x0, NoSymbol), same_screen YES, XLookupString gives 0 bytes: XmbLookupString gives 0 bytes: XFilterEvent returns: False
I tried suggested solutions in a similiar post, but nothing helped. Any clues?