Created attachment 126884 [details] screen recording SUMMARY Watch the attached screen recording and observe the window title while I switch between Kwin Scripts and Task Switcher kcms. We can see "*" during a few milliseconds. The same behavior occurs when I switch between Icons and Emoticons KCMs or between Proxy and SSL Preferences KCMs. EXPECTED RESULT "*" should never appear in the window decoration while we switch between KCMs. SOFTWARE/OS VERSIONS Operating System: KDE neon Unstable Edition KDE Plasma Version: 5.18.80 KDE Frameworks Version: 5.69.0 Qt Version: 5.14.1
What was happening here was that something was marking the KCM as dirty for a moment. This should have been fixed with the work to fix all of the "Reset" and "Defaults" buttons for all KCMs, which landed in Plasma 5.20. I don't see it anymore.
it's still reproducible for me on neon unstable. Operating System: KDE neon Unstable Edition KDE Plasma Version: 5.20.80 KDE Frameworks Version: 5.76.0 Qt Version: 5.15.0
Huh, that's weird. I don't see it.
I can see it sometimes if I switch quickly from KCM but it is very fast, on slower system it can be more visible. It may trigger an update of its state while it still loading and display furtively this "*".
A possibly relevant merge request was started @ https://invent.kde.org/plasma/kwin/-/merge_requests/349
Git commit c17914bc66718d0b9143654edf3c8d488709fe52 by Cyril Rossi. Committed on 28/04/2021 at 07:07. Pushed by crossi into branch 'master'. KCM KWinTabbox on defaultsIndicatorsVisibleChanged do not update unmanagedWidgetDefaultState M +24 -13 src/kcmkwin/kwintabbox/main.cpp M +2 -0 src/kcmkwin/kwintabbox/main.h https://invent.kde.org/plasma/kwin/commit/c17914bc66718d0b9143654edf3c8d488709fe52
This bug is still happening only on X11 session. Operating System: KDE neon Unstable Edition KDE Plasma Version: 5.22.80 KDE Frameworks Version: 5.84.0 Qt Version: 5.15.3 Graphics Platform: X11
Tested on Arch Linux running Plasma 6 alpha and neon unstable; cannot reproduce.