This question is an exact duplicate of:
I've read abt the ton of complications/problems ppl are facing with UEFI when installing Ubuntu alongside Windows, but I haven't been able to find a solution to the one I encountered.
I have a Windows 8 OS and we installed Ubuntu 12.04 next to it. However, the dual boot menu did not pop up upon reboot. It loaded Windows directly. (Secure boot & rapid technologies are disabled).
After some research & forum reading, we verified that Ubuntu was indeed present in the EFI partition and we ran boot-repair. Eventually, the boot menu appeared, but it did so at every second reboot (from a shutdown not a restart). Then, it disappeared again and the laptop goes directly into Windows.
When the dual boot menu appeared, we went into Ubuntu and life was good so the installation -or some parts of it- worked... But how do i now get the dual boot menu to appear as it's supposed to?
Furthermore, I read that with Windows 8 the dual boot menu becomes graphical... But we just had the regular old list.