Same here! I created the USB stick from the official Ubuntu 13.10 Desktop 64 bits iso with Universal USB Installer. I tried to boot in UEFI and BIOS mode, both with this same effect.
Motherboard: ASRock Z87 Extreme 6 CPU: Intel Core i5-4570 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1241589 Title: ubuntu 13.10 unable to boot on live usb (busy box - initramfs) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnomeradio/+bug/1241589/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs