After getting really annoyed at this bug, and it not being fixed I've found a workaround. Pipe all KScreen stdout and stderr to null.
Edit /usr/share/dbus-1/services/org.kde.kscreen.service To say [D-BUS Service] Name=org.kde.KScreen Exec=/bin/sh -c '/usr/lib/x86_64-linux-gnu/libexec/kf5/kscreen_backend_launcher>/dev/null 2>/dev/null' -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1579735 Title: kscreen spams my systemlog To manage notifications about this bug go to: https://bugs.launchpad.net/kubuntu-ppa/+bug/1579735/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs