Comment 14 for bug 912558

The pastebin from posting number 2 is mine, and yes the same problem. I manually wrote down from the kernel panic screen then transcribed it to a file while in recovery mode, used pastebinit to post.
Installing the upstart version mentioned earlier, it finally allowed me to boot normally.
Previously it would say it's doing a core dump but could never find one on the disk.
Also when booting to recovery mode, issuing: shutdown -h now would give the same kernel panic.
Posting number 10 at http://ubuntuforums.org/showthread.php?s=55d242cb643cf1b8293c27b55351e73e&t=1904842 seems to offer a possible solution with:
dpkg -l |awk ‘/^rc/ {print $2}’ |xargs sudo dpkg --purge

to clear out old conf files