Created attachment 130860 [details] Screenshot of relevant shortcuts SUMMARY Default shortcuts for switching between "Task Manager Entries" (applications), which is meta+<number> by default, has stopped working. STEPS TO REPRODUCE 0. Open ten different applications. 1. Press Meta+1 2. Press Meta+2 3. Press Meta+3 4. Press Meta+4 5. Press Meta+5 6. Press Meta+6 7. Press Meta+7 8. Press Meta+8 9. Press Meta+9 10. Press Meta+0 OBSERVED RESULT None of the ten shortcuts work. EXPECTED RESULT All ten shortcuts work. ADDITIONAL INFORMATION The weirdest results are when shortcuts are pressed when focus is inside the application Konsole: $ s1s2s3s4s5s6s7s8s9s0 This output is interspersed with bash autocompletion for some hostnames, which I don't understand.
The issue went away after reboot. I suspect, that the root cause was from one of the restarts of plasma & kwin that I did. That is, calling one of: kwin --replace & kquitapp5 plasmashell && kstart5 plasmashell can sometimes break the shortcuts. An possibly important point: all the other shortcuts with Meta key (including the infamous Meta key without anything else) continued working during that period of breakage.
*** This bug has been marked as a duplicate of bug 408310 ***