Unnecessary logging (?) of media-keys plugin
With gnome-settings-daemon-3.30.1.2-1.fc29.x86_64 (Fedora 29), I see quite many log messages caused by gnome-settings-daemon. They always happen in bursts of ~17 lines and look like this:
# watch_fast: "/org/gnome/desktop/interface/" (establishing: 0, active: 0)
# watch_fast: "/org/gnome/settings-daemon/peripherals/mouse/" (establishing: 0, active: 0)
# watch_fast: "/org/gnome/desktop/sound/" (establishing: 0, active: 0)
# watch_fast: "/org/gnome/desktop/privacy/" (establishing: 0, active: 0)
# watch_fast: "/org/gnome/desktop/wm/preferences/" (establishing: 0, active: 0)
# watch_fast: "/org/gnome/settings-daemon/plugins/xsettings/" (establishing: 0, active: 0)
# watch_fast: "/org/gnome/desktop/a11y/" (establishing: 0, active: 0)
# watch_established: "/org/gnome/desktop/interface/" (establishing: 1)
# watch_established: "/org/gnome/settings-daemon/peripherals/mouse/" (establishing: 1)
# watch_established: "/org/gnome/desktop/sound/" (establishing: 1)
# watch_established: "/org/gnome/desktop/privacy/" (establishing: 1)
# watch_established: "/org/gnome/desktop/wm/preferences/" (establishing: 1)
# watch_established: "/org/gnome/settings-daemon/plugins/xsettings/" (establishing: 1)
# watch_established: "/org/gnome/desktop/a11y/" (establishing: 1)
# watch_fast: "/org/gnome/terminal/legacy/" (establishing: 0, active: 0)
# unwatch_fast: "/org/gnome/terminal/legacy/" (active: 0, establishing: 1)
# watch_established: "/org/gnome/terminal/legacy/" (establishing: 0)
It would be nice not to have these lines printed to syslog to keep the logs nice and clean for being able to find real issues.