ideas for new power management system

Hello, I need some opinions about features provided by Power Management System. So far I implemented a battery monitor and backlight control. Now, I want to debate about: 1) Governors. KPowersave come with governor controller, but a guy from #udev irc channel adviced me that is actually is not necessary to implement it in a gui interface, because actually we don't want to change governors but we need to burn less energy. Check this "good practices" guide: http://www.codon.org.uk/~mjg59/power/good_practices.html 2) DPMS and screensavers. In my opinion, DPMS control should be passed to screensaver, not to be controlled by power manager. Why? I think that Power Manager should react only to events related to power supplies (like AC adapter plugged in, AC unplugged, battery low, etc) or ACPI events like "lid closed", "power button pressed", etc. Shutting down the monitor when the user is away from keyboard is not exactly related to power management, seem natural to be a part of screensaver. Opinions? Ideas? -- Serghei