[ubuntu] Ubuntu won't boot after installation [dual boot]

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http://ubuntuforums.org – Hi all, I finish installed Ubuntu 12.04 into my IdeaPad Y480 via normal boot and not UEFI. However after installation, my BIOS auto boot to Windows 7 and there is no selection to Ubuntu 12.04 I wonder what else I am missing to enable my laptop to boot into Grub2 and select which OS i want to use. In fact, it will be very much better if my laptop could auto boot into Linux in most of the time and only boot into Windows 7 by pressing some key [if that is possible] Likewise, I will be very grateful if anyone could enlighten me on what else need to be done to ensure Grub2 to boot inste (Hardware)