I have a Lenovo g580 Laptop. I had dual boot ubuntu 10.04 and ubuntu 12.04. I installed ubuntu 10.04 first and ubuntu 12.04 afterwards. I wanted to delete ubuntu 10.04 partition hence used gpart to delete the partition. Then I follwed this link and re-installed grub on /dev/sda5 where my ubuntu 12.04 is installed. I rebooted the machine.
But I could not able to boot into ubuntu partition. My laptop is first trying for PXE installation (which is in the bottom-most position in the boot order. after CD/DVD and Hard drive), failing, and asking me to change the boot order.
I could not find out what the problem is.Also I don't want to re-install. Please help me guys.