After much confusion, and unable to find any documentation on the subject, I believe to have learned that it is not possible to change the frequency with which discover checks for new software? Muon -> Settings -> Configure Software Sources -> Updates -> Check for updates -> Weekly ...is apparently ignored? Even set to "Weekly" I get update notifications several times per week. If that setting is not the appropriate place to change, perhaps it should be renamed or have clarifying language added. If there is an existing place to change the frequency with which Discover checks for updates, I apologize for the bug. If not, please consider adding a configuration option, or at least some documentation somewhere on how to change the frequency via config file, etc. Research on the web indicates that the way most people are solving this is by uninstalling Discover and PackageKit and the like. Thanks! (I'm on Kubuntu 18.10 with Discover 5.13.5)
Update: https://www.kubuntuforums.net/showthread.php/74803-Software-update-freuency-setting-is-ignored?p=423481#post423481 ...rumor is that there may be an actual bug involved.
https://phabricator.kde.org/D17375
Git commit 30de60f05d183e185724e614aad67b06aec987f3 by Aleix Pol. Committed on 10/12/2018 at 00:35. Pushed by apol into branch 'Plasma/5.14'. Don't automatically refresh if the user already asked apt to do so Summary: Just expect apt to do the right thing. Reviewers: #kubuntu, sitter, rikmills Subscribers: ngraham, plasma-devel Tags: #plasma Differential Revision: https://phabricator.kde.org/D17375 M +6 -5 libdiscover/backends/PackageKitBackend/PackageKitNotifier.cpp https://commits.kde.org/discover/30de60f05d183e185724e614aad67b06aec987f3