Live USB Boots to Minimal Bash-Like Interface in UEFI Mode

Hi,

I have an Acer Aspire V5 laptop that came with Windows 8 installed. I've been trying to set up a dual boot with Ubuntu. I made live flash drive with Ubuntu 13.10. However, when I boot from it, I end up in this minimal bash-like interface grub command prompt. The drive boots in Legacy Bios mode just fine, but not in UEFI mode. I have disabled fastboot, and I don't think my laptop has SRT. Any suggestions?
Thanks very much.