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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?

  • Seems like a stuck key. WD-40 – Rui F Ribeiro Jan 11 '18 at 11:51
  • I do not see anything stuck, and WD-40 is not available in my country, as I live in the Czech republic, Europe. – Daniel Zvir Jan 11 '18 at 13:52
  • I can get WD-40 here in Portugal...or something similar. – Rui F Ribeiro Jan 11 '18 at 13:53
  • I'll look into the alternatives. Meanwhile, any way to detect which key is being stuck? What is the 221 keycode? It even says NoSymbol. If I type the 'f' letter for example, it prints it directly into the output, that I pushed the 'f' letter. – Daniel Zvir Jan 11 '18 at 13:55
  • 221 it should be ] } – Rui F Ribeiro Jan 11 '18 at 14:05
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It seems to be caused by a bug in the kernel module peaq_wmi as unloading it fixes the issue. This bug was intruced by the 4.13 kernel update. More people have had it. More info here: Arch linux forum, and the solution is here: unix & linux autorepeat does not work.

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