i can't boot the installed ubuntu 12.0 on my toshiba sateliteL750 . it only boot from the preinstalled os (win7) and i want it to be alongside with different disk partition. there is no multiple option to boot for other oss.
Ubuntu came with GRUB on it, so it will only load if it's the primary boot device.
Go into the BIOS and into the Boot Device Order.
Select Ubuntu's drive (It's usally
Save the changes and reboot.
Hopefully GRUB will come up and you will be able to choose between Windows and Ubuntu.
Hope this helps!!!