Looks like this message is not meant to be displayed see bug: https://bugs.launchpad.net/ubuntu/+source/gnome-power-manager/+bug/355877
My guess is this has been fixed again.
Looks like this message is not meant to be displayed see bug: https:/ /bugs.launchpad .net/ubuntu/ +source/ gnome-power- manager/ +bug/355877
My guess is this has been fixed again.