A WORKAROUND: I attempted to downgrade the the previous version of KVM after this problem happened, but unfortunately the previous version is no longer in the repositories.
If you need kvm as badly as I do, the workaround is to find someone with the old version still installed and use their /usr/bin/kvm binary. I simply overwrote the new version with the older version, and it seems to work with no obvious problems. I got the older version from a coworker who is more conservative in his upgrades, but if you trust some sketchy binary some dude uploaded onto a website, attached is the kvm_12-1ubuntu1 version of the /usr/bin/kvm binary. ** Attachment added: "The kvm binary from kvm_12-1ubuntu1" http://librarian.launchpad.net/6719850/kvm -- kvm can't initialize due to old kvm kernel version https://launchpad.net/bugs/80293 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs