I'm running 32bit ubuntu-minimal with an AMD Phenom II X2 555 processor. From the partial stack trace, it looks like it crashes when initializing my sata harddrive. I get the same results from the lastest 188.8.131.52.7 and the stable 3.6.7 mainline kernel. 3.5.0-17 leftover from quantal still works fine though.
Anyone know where to grab the full stacktrace without a null modem cable? No luck finding it in my logs so far.