Here's how you can add advanced power settings to Linux Mint 12's GNOME 3 desktop. 1. Open a terminal window and type in the following command, then hit enter. sudo apt-get install dconf-tools 2. Open the dconf editor and then go to org/gnome/settings-daemon/plugins/power. 3. Choose the options you want in the Configuration Editor. Now your Linux Mint 12 GNOME 3 desktop should have more useful and advanced power settings than it did previously.
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Linux Mint 12 Tips and Tricks | Linux Mint 12 Forum