https://bugs.kde.org/show_bug.cgi?id=365918
--- Comment #12 from Thomas Lübking <thomas.luebk...@gmail.com> --- The flicker is due to the re-used buffer, the question is why one of them is invalid but for the newly exposed area and this seems to be related to window decorations. Let's start with the obvious: pelase deactivate blur and contrast effects (kcmshell5 kwineffects) and see whether it's still a problem. You can also try export KWIN_USE_BUFFER_AGE=0 kwin_x11 --replace & and see what happens (this will read the old data from the front buffer instead of relying on the buffer_age extension) -- You are receiving this mail because: You are watching all bug changes.