Tired phone wont wake!

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http://forum.xda-developers.com – Ok so I've been using a few different versions of the CM10 ROM and I've noticed a new problem. On occasion, when I go to wake the device, it will not wake. The keys light up, but thats it, the screen doesn't come on. The only way to get it working again is to hold down the power button and wait till it restarts. It's happened twice so far, not too frequently but annoying none-the-less. Is there something I can do to fix this? (HowTos)