TJL> This is probably your dbus system bus. It's hard to say since pstree TJL> does not show what arguments were used. # pstree -aA|grep dbus | |-grep dbus |-dbus-daemon --system |-dbus-daemon --fork --print-pid 5 --print-address 7 --session |-dbus-launch --sh-syntax --exit-with-session