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I'm not a super savvy super user, so I'm not sure what to look for. I have a VM running 12.04.

It runs fine, and then just dies (no ping, no ssh). When I log into VMwareSphere, I see the VM still 'UP', but the console gives me a response-less black screen. This lead me to believe that Ubuntu was going into some sort of sleep/hibernate state. I double checked the power settings and found nothing out of the ordinary, so now I'm stuck on how to fix the problem.

There are 5-7 (CentOS-5.8 & 6) machines running on the same server/VM setup with no problems at all.

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I noticed this happened after installing VMWare tools.. regretting that now! –  Erik Apr 2 at 4:25
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