Dear Maintainer,

Since upgrading from Bookworm to Trixie, when I lock my screen,
kwin_x11 maxes out one CPU core.  Most of the CPU usage goes to kwin_x11 but
some goes to Xorg and a little to ksmserver.

I found this bug report upstream and it seems to be the same as my issue
https://bugs.kde.org/show_bug.cgi?id=484323

The workaround of using systemctl --user restart plasma-kwin_x11.service
(via ssh) after locking the screen was effective for me, as well as going to
System Settings > Display and Monitor > Compositor and unchecking
Enable on Startup.

It seems like the bug actually comes from Qt and was fixed here
https://codereview.qt-project.org/c/qt/qtbase/+/663811

Thanks

Jared

Hi Jared,
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1111957

I'll try to backport this to trixie.