Dual Boot Win 8 fail to boot Ubuntu

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http://askubuntu.com – I have a new Pavilion dm1 with pre-installed Win 8, and i want to install Ubuntu 12 as a dual boot option. I need a larger partition for Ubuntu than WUBI will allow. I have downloaded 12.10 and installed onto a USB drive. I changed bios on the laptop to allow booting from USB I enabled legacy boot I resized the partitions using the auto tool I was able to go through the entire installation process. When I rebooted the machine, there was no GRUB screen nor any option to choose Ubuntu. Machine booted to Win 8. I tried to reinstall. Installation software did see Ubuntu and gave me the opt (HowTos)