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My GRUB menu vanished, and I cannot access it with left SHIFT. When I press the left SHIFT I see opening GRUB and then the desktop menu. I need it urgently because I lost my password.

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2 Answers

When you see on the screen Opening GRUB... press the SHIFT key several times. Not seconds before that, only when that is displayed (or maybe just a second before).

If you are not still able to enter, please make sure that you are using Grub2. Earlier versions of grub (0.9x) are issued with the ESC key instead.

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Boot to an Ubuntu live cd and use boot-repair to unhide the GRUB menu.

In a terminal, type:

sudo add-apt-repository ppa:yannubuntu/boot-repair && sudo apt-get update && sudo apt-get install boot-repair && gksudo boot-repair

Once boot-repair opens, click Advanced Options. Make sure that "Unhide Boot Menu" is checked and run the repairs, following any instructions you are given.

You have to do this from a live USB because you lost your password.

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