On Tuesday July 12 2016 15:29:48 Duncan wrote: I'm surprised how long this thread has been running already, and that I still have no clue exactly what is happening here http://www.mail-archive.com/kde@xxxxxxxxxxxx/msg04352.html It just happened to me again, with 2 novelties: - it started after I had opened a document in a running KDevelop5 session, from a Konsole5 application. The keyboard input stopped after a few keystrokes, in BOTH KDevelop and all windows of the parent Konsole process. Until now I had only seen this in Konsole itself. - banging long enough on the keyboard an occasional keystroke would get through. changing keyboard layouts had no effect (session-wide or in Konsole), nor had restarting KWin (why would it), a suspend/wake cycle or cycling among virtual consoles. Suggestions what else to try more than welcome!! One of these days it's going to happen during an operation where I can really not afford losing my keyboard ... :-/ Thanks, R. >The bit that surprised me was that the keyboard shortcuts quit working >too, while the menus still work. That does support your original theory, >that it's the process that goes off the rails. > >