I have UEFI based computer (I dont know the UEFI in detail but I guess it is a replacement of BIOS). In the Grub2 boot list there are 3 different Windows entry but none Ubuntu 12.10 entry. I m booting ubuntu by using grub console. I tried to use boot-repair program. When it starts it gives an warning
EFI detected. Please check the options.. Then I ignore the warning and choose the
Recommended Repair option. However it did not work too. Still no entry on boot list. I tried to use Windows bootloader to deal with the problem by using EASYbcd program but after I add ubuntu entry, windows bootloader failed too and I cannot boot windows now on. I guess my all settings amiss about EFI system. Do I need to do something special to grub with respect to the EFI? What is special about EFI and how can I solve the problem on GRUB?
Here all my grub information generated by BootRepair http://paste.ubuntu.com/1552273/
After now, I am getting an error from BootRepair:
An error occurred during the repair. Please write on a paper the following URL: http://paste.ubuntu.com/1552313/ In case you still experience boot problem, indicate this URL to: [email protected] You can now reboot your computer. Please do not forget to make your BIOS boot on sda4/EFI/ubuntu/grubx64.efi file! The boot files of [The OS now in use - Ubuntu 12.10] are far from the start of the disk. Your BIOS may not detect them. You may want to retry after creating a /boot/efi partition (FAT32, 100MB~250MB, start of the disk, boot flag). This can be performed via tools such as gParted. Then select this partition via the [Separate /boot/efi partition:] option of [Boot Repair].
My PC specs:
x64 Ubuntu 12.10 Asus K55V notebook Windows 8 Installed on another partition (Currenty not bootable)