Seems the latest version of KDE includes an automatic notifier when there are system updates available. This is great for, shall we say, “normal” users. But I run Debian Unstable. Which means I will be nagged for more updates within a matter of hours after doing a system upgrade, and things will rapidly go downhill from there. So naturally I would rather turn these off completely. The obvious place to find this setting would be in the “Notifications” panel in the System Settings. Unfortunately, the “Event source:” menu lists about three dozen different sources of notification events, and it isn’t obvious (at least, it wasn’t to me) which one handles software updates. The answer is, it’s the one called “Discover”. You will see only one event in its list: “Updates Are Available”. Simply uncheck all the forms of notification for this event. Hmm, I wonder if this panel couldn’t do with a search box...?