[ubuntu] grub does not boot ubuntu

Hi,

I recently tried to configure my laptop (lenovo S430) with uefi to dual boot. The laptop came with windows 8. I partitioned the disk and installed ubuntu 12.10. I followed the instructions here https://help.ubuntu.com/community/Boot-Repair to setup grub for dual boot.

Dual boot does not work. The grub menu is listing:
1)Windows UEFI bkpbootmgfw.efi 2)Windows Boot UEFI loader 3)EFI/Lenovo/Boot/bootmgf.efi 4)Windows 8 (loader) (on /dev/sda4) 5)System setup

So no ubuntu.
Boot repair provided this infomration:
http://paste.ubuntu.com/1610298/

I am not sure how to implement correctly the last instruction from the URL :
"Please do not forget to make your BIOS boot on sda2/EFI/ubuntu/grubx64.efi file!"

I would like to be able to select windows 8 or ubuntu 12.10 from a menu at start up.

Thanks