After I updated my Ubuntu to 12.04, my system went slow and it warned me that my disk has less space left. I checked my disk and found the file /var/log/cups/error_log 's size was 78G!!. I checked this file and found it full of "notifier for subscription dbus:// went away retrying retrying"......... What's going on here? And what can I do?
try remove this folder and make it again with this command
sudo rm -vfr /var/log && sudo mkdir /var/log
and check if any tools make report about your system like apport disable it from here
and something like this uncheck it and make record activity inactive like this in privacy option
and in software sources uncheck this option you can this windows by type in terminal
gksu software-properties-gtk
and do that