Comment 34 for bug 638307

Laptop-mode-tools is a well tested, supported and proven package to configure the system wide power management.

However, instead of using/extending system wide power management solutions ubuntu lets gnome apps call powermanagent functions directly. And then they cripple down the system wide power management configuration facilities, to not work as designed.

I don't know why ubuntu devs do repeatedly try to copy some stuff from it and implement a session-only, desktop-only "replacements". They failed everytime. If not in making a fully functional release without the infamous excessive load cycle bug, then in maintaining it over time.

Make use of l-m-t, make a frontend, improve it, add a dbus feature to it or whatever.
But please stop to come up with those dumbed down "replacements" and breaking the regular behavior leading to bugloads of problems.

No GUI (or Desktop Power Manager) tool should ever assume it is taking care of all power saving measures itself exclusively and warrant to disable other cripple down other packages.