Thanks for reporting this bug. I can't reproduce this on a wily system. Can you please
show 'dpkg -l | grep qemu' output show 'uname -a' output make sure nbd module was loaded ('sudo modprobe nbd') make sure you ran qemu-nbd under sudo? check whether this happens with a clean empty qcow2 (qemu-img create -f qcow2 x.qcow2 1G) status incomplete ** Changed in: qemu (Ubuntu) Status: Invalid => Incomplete -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu in Ubuntu. https://bugs.launchpad.net/bugs/1542509 Title: /build/qemu-YZq7uh/qemu-2.3+dfsg/nbd.c:nbd_init():L670: Failed to set NBD socket To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/qemu/+bug/1542509/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs