How to activate tuxonice hibernation in KDE

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http://askubuntu.com – I'm using a KDE Ubuntu based distro (Linux Maya 13 KDE edition). I have installed tuxonice and if I execute this from the command line: sudo hibernate then it hibernates and resumes very quickly. If I try to do it from the KDE GUI, it just locks my desktop and nothing else. I suspect it is trying to execute: pm-hibernate Please, any hint about activating tuxonice in KDE? Or at least preventing asking for a password (due to "sudo"). (HowTos)