Grub menu not showing for Ubuntu 12.04

Neil

This is the first time I installed Ubuntu(v12.04). I have a HP laptop pre installed with Windows 8. I installed it alongside Windows and the installation was successful. But after the customary restart post installation, the Grub menu didn't show up and the system booted into Windows automatically. This is happening ever since, the grub menu doesn't show up at all and I cannot boot into Ubuntu 12.04.

I was having some problems with the default UEFI settings so I had to disable Secure Boot and enable Legacy for my LiveUSB to get detected in the first place. Does this action cause any problem?

Totally stumped. Please help. Thanks. :)

Rod Smith

Installing in BIOS/CSM/legacy mode was a mistake; you've now got a BIOS-mode installation of Linux and an EFI-mode installation of Windows. This is a problem, and to correct it, you must install an EFI boot loader for Linux. There are several ways to do this, but the two easiest are likely to be:

  • Download the USB flash drive or CD-R version of my rEFInd boot manager and prepare a medium from it. Boot from that medium. It should show boot options for both Windows and Linux. If both boot options work, install the Debian-package version of rEFInd from Ubuntu.
  • Run the Boot Repair tool from an Ubuntu live CD. This should fix the problem at once, but it's a bit riskier than the previous solution because it applies a fix with no initial testing. It usually works, but on occasion it can make matters worse.

If neither of these solutions work, post back with the URL that Boot Repair provides. That will give us detailed technical information on how your disk is partitioned and configured.

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