I just installed ubuntu 12.04 lts on my pc and as soon as it restarted instead of going to the grub menu it boots straight to windows. I've shut down my computer and turned back on serveral times but still no grub menu. I was thinking that maybe it was my tv (Using my TV as a monitor) but i tried moving the arrow keys up and down to delay the automatic boot but that seems to do nothing. If I press F2 or F11 I go straight to my motherboard menu. My motherboard is an AsRock pro3.