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> So AMD's Phenom revision b2 has a hardware bug, I am sure everyone knew that by now. AMD released an ["unofficial patch"](http://www.x86-64.org/pipermail/discuss/2007-December/010260.html) some time ago against 2.6.23.8, and updated it for [2.6.24 and 2.6.25](http://www.x86-64.org/pipermail/discuss/2008-April/010398.html) later. Those patches not recommended by AMD, and using them may burn down your house in addition to your computer. > > That said, at least several people found the patch useful. Since I was one of those who were stupid enough to buy one of those broken CPUs, I looked into updating the patch a while ago to 2.6.24-19, which is what Ubuntu Hardy uses. Most of the patch applied cleanly, except in the area of i386/x86-64 merges. I am no kernel hacker, but I've done my best to make the patch apply. The result is [here](http://hxbc.us/software/phenom-b2.diff). I can't vouch its correctness except that I've been running it for almost a week now with 1-2 virtual machines running most of the time. > > Again, before using this you should read through the 2 threads linked above. If it breaks, you get to keep the pieces.