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I have installed Ubuntu 12.04 LTS 64-bit alongside with windows 7. During installation I choose Something Else and partitioned as followed:

Partition Screenshot

And choose /dev/sda for boot loader installation

The installation was successful. I never get a boot menu from where I could choose the OS.

What is the problem?

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You should install GRUB bootloader to /dev/sda not sda5. – Samik Jun 18 '12 at 14:02
I infact first installed it to /dev/sda but got the same problem. – Ashish Jun 18 '12 at 14:30
You can try booting from a live CD, sudo mount --bind /boot <path to sda5>, sudo mount --bind / <path to sda3> then issue sudo grub-install /dev/sda, finally sudo update-grub2 and provide the output in your question. – Samik Jun 18 '12 at 14:40
What do you meant by Live CD? – Ashish Jun 18 '12 at 14:55
Yes. But you can call it a Live USB if you want. – Emerson Hsieh Jun 18 '12 at 15:05
up vote 1 down vote accepted

Open the terminal and run this command:

root@penreturns:~$ sudo gedit /etc/default/grub

Comment line (add "#"):


It must look like this:


Update your GRUB with this comand:

root@penreturns:~$ sudo update-grub

Reboot your system and you will see how the system will now stop at the GRUB2 boot screen.


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