Actually, using the same options as you do I do not get a failure. Can you show the result of
qemu-img info spv-2912.qcow2 ** Changed in: qemu-kvm (Ubuntu) Importance: Undecided => Medium ** Changed in: qemu-kvm (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1006655 Title: Can't convert to vmdk with the streamOptimized subformat To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/qemu-kvm/+bug/1006655/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs