[ubuntu] ubuntu 12.04 - change power settings for login screen (no session active)

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http://ubuntuforums.org – Hello, I've been unable to find answers elsewhere, I hope you guys can help me. I've been searching how to change the default settings for power management on ubuntu 12.04 with no active users, on the login screen. Also, I'm unable to close the laptop lid (also on the login screen) without making the laptop suspend, which is very troublesome when trying to use it through ssh... I'm trying this on a fresh install of ubuntu 12.04.2, which hasn't any "make default" buttons as in 11.04. Any ideas? Thanks. (Hardware)