I've finally managed to reproduce this (with the aid of some fairly arcane kvm options: -hda t.img -usb -drive file=precise-desktop-i386.iso,if=none,id=b,boot=on -device usb-storage,drive=b). Embarrassingly, it's a case of missing parentheses.
I've finally managed to reproduce this (with the aid of some fairly arcane kvm options: -hda t.img -usb -drive file=precise- desktop- i386.iso, if=none, id=b,boot= on -device usb-storage, drive=b) . Embarrassingly, it's a case of missing parentheses.