Note that this is being reported against mantic (23.10) so what Jammy can/cannot do is not really relevant.
The bit about the entire Default section disappearing seems to have sorted itself out, but the absence of any information about sources configured using *.sources files is still present. This applies both to the list shown in "Settings/Default source" and the "Software Sources/Other Software" tab. I'll attach the screenshots and the sources/list.d and trusted.gpg.d directories that led to them (these correspond to the same repositories, but Sources-1 just has 1 *.sources file (winehq) as it has been upgraded from Jammy with each 6-month release (just editing the release name in the *.list files) whereas Sources-5 is from a fresh install of Mantic on a new system with recent add-apt-repository runs (mostly form Launchpad), which now produces *.sources files. The plasma-discover version is: root@parent:/local/configs# dpkg -l plasma-discover | cat Desired=Unknown/Install/Remove/Purge/Hold | Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad) ||/ Name Version Architecture Description +++-===============-=================================-============-================================== ii plasma-discover 5.27.10-0ubuntu1~ubuntu23.10~ppa1 amd64 Discover software management suite -- You received this bug notification because you are a member of Kubuntu Bugs, which is subscribed to the bug report. https://bugs.launchpad.net/bugs/2059776 Title: Updates cannot handle apt *.sources files To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/plasma-discover/+bug/2059776/+subscriptions -- kubuntu-bugs mailing list kubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs