My laptop is Acer aspire V5-571P-6815 with EFI/GPT system windows 8 -64 bit.
I had windows 8, ubuntu, lubuntu and mint. Boot options in both bios and also while getting boot options pressing F12 i got same and working as per selection.
I installed OSX distro iATKOS and that spoiled the whole things. Finally I managed to get the things right by putting image of EFI partition(sda2) using clonezilla back in that EFI partition. Then I deleted all linuxes and installed only ubuntu. and using rEFInd boot manager.
Now the problem remains that changing boot order in bios has no effect on boot. It always boots to rEFInd boot manager. But before OSX attempt, I could change boot order including rEFInd, windows8 and linuxes and it worked ok. Now BIOS boot menu shows non existant boot options of old removed linuxes also. What to do to clean it and make it work as before?