Comment 3 for bug 361938

I was the original submitter of the "qcow2 corruption observed, fixed by reverting old change" thread on the <email address hidden> list, after finding corruption when testing kvm-83.

I've just submitted an update to the qemu and kvm lists, saying that the symptom I observed (a blue screen while booting some image) seems to be fixed in kvm-85, but not kvm-84.

I'm not sure if the kvm-84 to kvm-85 qcow2 fix is in the latest Ubuntu kvm package, kvm-1:84+dfsg-0ubuntu11 indicated by the previous comment.

If it is, that's great. But if the latest package only includes code equivalent to upstream's kvm-84, there's an important qcow2 corruption fix which should still be included.

Also, I see from release notes for the later upstream kvm versions that there are further qcow2 corruption fixes in later versions. You may wish to incorporate those too, I don't know.