[libvirt-users] "failed to connect to the hypervisor"

Hi, all. Ubuntu host, attempting to get virsh working with VirtualBox... and failing. Here's what happens: root@foobox:~# virsh -c vbox:///session list error: failed to connect to the hypervisor error: internal error: unable to initialize VirtualBox driver API ------------------------------------------------------ Now, most of the docs I read about "failed to connect to the hypervisor" have other errors that happen *before* the "failed to connect" one, that are the root cause (e.g., unable to open socket, or bad cert, or whatever). But that's not the case, here. And what puzzles me more is that -- while I don't know what the output *should* look like -- to my eye, strace seems to say that we're getting information back: 1940 read(5, "Node 1 MemTotal: 33011680 kB\nNode 1 MemFree: 32565612 kB\nNode 1 MemUsed: 446068 kB\nNode 1 Active: 57948 kB\nNode 1 Inactive: 77036 kB\nNode 1 Active(anon): 27688 kB\nNode 1 Inactive(anon): 84 kB\nNode 1 Active(file): 30260 kB\nNode 1 Inactive(file): 76952 kB\nNode 1 Unevictable: 52 kB\nNode 1 [...] ------------------------------------------------------ In my googling, I see mention of per-VM XML files that... do something. But what they do, and how they're generated, doesn't seem clear. (E.g., XML mentioned here: http://libvirt.org/drvvbox.html -- it just sort of sits there, with no context.) Is that something I need? Thanks for any enlightenment you might be able to offer me, -Ken