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How can I repair grub? (How to get Ubuntu back after installing Windows?)

Recently i bought a lenovo u410 ultrabook. It has given along with windows 7 and 4 primary partitions. So to install ubuntu 12.04 i removed one of the primary partition and made it as extended partition. In that extended partition, i allocated memory for the swap and root (/) directory and then installed the ubuntu. After that by using EasyBCD tool, added ubuntu to the boot menu in grub2. So when i try to boot into ubuntu it is showing grub> prompt only. From there how can i boot into ubuntu.

Thanks in advance

marked as duplicate by Eliah Kagan, Jorge Castro, fabricator4, stephenmyall, hhlp Jan 11 '13 at 10:50

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  • Could you explain why you had to use a software like EasyBCD? Wasn't Grub installed correctly by Ubuntu? – Andrea Corbellini Dec 19 '12 at 10:50
  • yes, after installation ubuntu, it is not showing in booting menu, so by reading some threads i used it. – Kranthi Dec 19 '12 at 11:09
  • "it is not showing in booting menu" ← do you mean that the system booted directly in Windows? Or that it showed an error (and if so, which error)? Sorry for insisting, but these information are important to understand your problem. – Andrea Corbellini Dec 19 '12 at 13:28
  • UEFI... Please if possible, look in BIOS if there's is an option to switch from UEFI to BIOS legacy or something similar. I had the same problem on my Acer laptop. This option should be available in the same place where you choose the boot order. – Melon Dec 19 '12 at 13:31
  • @AndreaCorbellini: At boot time windows boot manager showing only windows OS to select. – Kranthi Dec 19 '12 at 14:39

Try the Recommended Repair of this little tool: Boot-Repair https://help.ubuntu.com/community/Boot-Repair

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  • Great :) Please don't forget to validate the answer (click the icon under the arrows) – LovinBuntu Dec 20 '12 at 19:59

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