Ubuntu – Installed Ubuntu 12.04 LSD alongside with windows 7. No boot menu

dual-bootgrub2menuwindows 7

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

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?

Open the terminal and run this command:

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

Comment line (add "#"):

GRUB_HIDDEN_TIMEOUT=0

It must look like this:

# GRUB_HIDDEN_TIMEOUT=0

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.

Enjoy!