Thanks for reporting this bug. This is a reqression in qemu-kvm since precise. In precise, the following works fine (meaning, kvm starts up - no idea if it does what it should):
kvm -vnc :1 -cdrom raring-mini-amd64.iso -hda raring.img -net nic,model=virtio -net tap,script=no,downscript=no,ifname=tap0,sndbuf=0 In raring (and presumably quantal) it gives a segfault ** Package changed: libvirt (Ubuntu) => qemu-kvm (Ubuntu) ** Changed in: qemu-kvm (Ubuntu) Importance: Undecided => High ** Changed in: qemu-kvm (Ubuntu) Status: New => Confirmed -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu-kvm in Ubuntu. https://bugs.launchpad.net/bugs/1079713 Title: failed to set sndbuf on VMs network interface To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/qemu-kvm/+bug/1079713/+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