I installed 12.04 on a brand spanking new Mac Mini 5.1 yesterday and earlier today I noticed a couple of artefacts that appeared on random. It is like parts of the screen gets scrambled. And a couple of hours ago the mac freezed completely. Is this a driver problem, or part of something more sinister (hardware, overheating, ram problem).
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)
example of the problem: