I get the error when using the Startup Disk Creator on Ubuntu 14.04 to make a startup USB stick of ubuntu-15.04-desktop-amd64.iso and booting it within Startup Disk Creator (using the Test button, or running "sudo qemu-system-x86_64 -enable-kvm -m 512 -hda /dev/sdb" manually).
I get the error when using the Startup Disk Creator on Ubuntu 14.04 to make a startup USB stick of ubuntu- 15.04-desktop- amd64.iso and booting it within Startup Disk Creator (using the Test button, or running "sudo qemu-system-x86_64 -enable-kvm -m 512 -hda /dev/sdb" manually).