This is not fixed: https://bugs.kde.org/show_bug.cgi?id=466463 . However, a working fix exists and is not a problem.
Is there a problem with the backport of the patch?
The problem with the menu for gtk2 applications can be solved by editing the .gtkrc-2.0-kde4 file. There remains a bad include.
This problem is not solved: https://bugzilla.redhat.com/show_bug.cgi?id=2173739 (https://bugzilla.redhat.com/show_bug.cgi?id=2173739).
Gtk2 applications have invalid rendering of popup menu headers in the breeze theme. Try the main menu in pidgin.
These problems are not in kde neon unstable. Unstable == 5.27.1. But in fedora these problems are already in 5.27.1. Is there a packeges building error?
steps to reproduce problem with systemmonitor / ksysguard:
bad sort column: - press ctrl - escape for open systemmonitor - click to header of column CPU (for sort by cpu) - close systemmonitor - press ctrl - escape for open systemmonitor - check sort by
bad select of columns - press ctrl - escape for open systemmonitor - right click on header of any column - select hide column... - close systemmonitor - press ctrl - escape for open systemmonitor - check columns
bug in systemmonitor and ksysguard
failed load / save configuration of columns - forgotten column selected for sort and mismatch of order & width after next run
persistent problem: https://bugs.kde.org/show_bug.cgi?id=361097
The problem is solved. But the fix is not used.
The problem with error 466463 blocks everyone who has a high resolution monitor and uses x11. This is not a minor bug. Since the release of 5.27 it is unusable on high resolution.
That's why I gave it a negative karma.
If it helps in creating a patch package, here is my fix for fc36: https://jx.dts-soft.cz/Fedora/JX/36/SRPMS/kde-gtk-config-5.27.2-1.01JX.fc36.src.rpm