I had the same issue i.e empty Application Menu, after upgrading to kde-frameworks/kservice-5.28.0 and removing kde-apps/kuser as per the emerge message.
On top of the empty Application Menu, KDE lost all the file associations. Double-clicking any known file types opens a dialog asking for an application.
I re-merged kde-apps/kuser and the two problems were fixed. I still have kde-frameworks/kservice-5.28.0
Code: Select all
# emerge -pv kde-frameworks/kservice
These are the packages that would be merged, in order:
Calculating dependencies... done!
[ebuild R ] kde-frameworks/kservice-5.28.0:5/5.28::gentoo USE="man -debug {-test}" 0 KiB
Total: 1 package (1 reinstall), Size of downloads: 0 KiB
So, it has something to do kuser. Does this make sense?