Comment 2 for bug 816464

Maybe this is trivial news, but i experienced the same problem. I played a bit around even trying to create a entirely new VM with virtio device from scratch (not changing the bustype). This didn't work eighter.
So i tried to do it directly using the "virt-install" command. Unfortunately this fails with exactly the same error.

ERROR operation failed: failed to retrieve chardev info in qemu with 'info chardev'