Sometimes my system gets into a state where the K menu is unresponsive - clicking on the big K doesn't do anything. I'm running Kubuntu 18.04. How can I kick-start it? (I'm using the Application Menu interface, in case that maters.) The system doesn't seem to be hung generally, and top in a virtual consoledoesn't show anything obvious.
Addendum: I've discovered, though, that if I right-click the K, choose a different application interface, again right-click on the K, and choose "Application Menu", I can get it back.
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