12.04 Suspend not working proper

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http://askubuntu.com – Okay I may have a strange issue. I can suspend my session and the computer will suspend as normal i.e I can press my power button and the computer will come back to my session. However, when I leave the computer for an extended amount of time it will not come out of being suspended. The computer will cold boot. I've tried looking through similar questions and can not find this exact same issue. (HowTos)