How do I disable my keyboard's suspend key? My keyboard (Logitech k800) has a key for powering off the pc, in Ubuntu its working as a suspend button. I've tried assigning another shortcut to that button, but its not preventing the computer from sleeping. Also, I'm not sure if there's a difference between suspend and sleep, but it appears to be turning the computer completely off, but when I start it back up it resumes where it left off.
I found this question and yours while I was doing a search, this one has been answered and accepted.
 The answer is for 11.10 but I tried it and it still works, I just used the terminal commands. Either way is fine but dconf editor can be hard to use, or at least hard to find what you are looking for, also if you accidentally change things, or forgot where to find the settings that you changed, it can be really hard to correct things so use with care.