SUMMARY This has happened to me multiple times. It's not a deal-breaker, but seems like a minor annoyance and something you wouldn't expect to happen. When the Reboot window appears, unless you click exactly on the Reboot button, the whole window would get closed. A mislick means you need to start over from the very beginning (KDE menu -> Leave -> Reboot -> .. make sure to click Reboot accurately this time ..) The same applies to "Log out" as well. STEPS TO REPRODUCE 1. KDE menu -> Leave -> Reboot 2. On the newly-appeared window, click at any random position (except on a button) OBSERVED RESULT The window is closed. You need to start over. EXPECTED RESULT The window only gets closed if you explicitly click on a button (either Reboot or Cancel). Clicking anywhere else should not do anything. SOFTWARE/OS VERSIONS Linux/KDE Plasma: Archlinux KDE Plasma Version: 5.15.5 KDE Frameworks Version: 5.58.0 Qt Version: 5.12.3
This is by design. Otherwise people would try to click on the empty area and get frustrated that it doesn't close. We're just being consistent with the full-screen Application Dashboard, which has the same behavior. If this annoys you, you can just immediately hit the return key to click the currently-selected button, or turn off this screen entirely in System Settings > Startup and Shutdown > Desktop Session > Uncheck "Confirm Logout"
I have never used Application Dashboard (nor do I know how to launch it). Perhaps it's something additional I have to install. While I don't personally agree with this click-to-dismiss paradigm, I do understand why this is done this way. Thanks for the explanation! .. and thanks for the workaround! It surely reduces friction.