[ubuntu] Random complete system freeze with Ubuntu 12.04 32bit

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http://ubuntuforums.org – Hi, for 4 weeks now, I have been running Ubuntu 12.04 on a brand new Lenovo Thinkpad T530. For the first three days, I had the 64bit Version of 12.04 installed, which froze randomly every 10hours or so. I updated the Kernel, which fixed the problem, but lead to driver problems. After 3 days of frustration, I installed the 32bit version of 12.04 - wich ran _TOTALLY_ (and i mean: TOTALLY) smooth until this morning. Since this morning, I had 4 total system freezes, every 2 hours or so. This is completely unexplainable to me. I changed _NOTHING_. I did not even install anything in the past t (Hardware)