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I recently installed Ubuntu 13.10 on my Toshiba P55 A5200 and everything was working perfectly. After I updated Ubuntu and installed a few applications GRUB menu won't show up and my computer only boots directly into Windows.

Your help is appreciated.

Eyob
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1 Answers1

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You can try reinstalling grub from within the live cd. Remember to replace 'sdX' with your desired boot disk/partition.

$ sudo grub-install /dev/sdX

$ sudo update-grub

If that fails try using boot-repair by following the steps below:

  1. Boot into your live cd.
  2. Download and install boot-repair (instructions here).
  3. Run from terminal: $ sudo boot-repair
  4. Select 'fix recommended'
  5. Reboot.
bleeves
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  • Which partition will that be? Is it the first /dev/sd1, or is it the one where I installed ubuntu (in which case is /dev/sd6)? Also, I noticed that my swap partition is saying 'unknown'. Perhaps it got corrupted during the update. Could it be a cause of this problem, and should I format it to swap again? – Eyob Mar 13 '14 at 20:00
  • Are you using Ubuntu as the only operating system? if so it would be safe to install grub to /dev/sd1. Sometimes swap will show up as 'unknown'. Try running $ sudo fdisk -l and see if it flags as swap. – bleeves Mar 13 '14 at 20:13
  • I use it alongside Windows 8. – Eyob Mar 13 '14 at 20:22
  • Boot into the live usb and follow the steps above regarding boot-repair. This wont mess up your windows installation. – bleeves Mar 13 '14 at 20:33
  • I ran boot-repair and there is a dialog box with this: "WinEFI detected. Do you want to activate [Backup and rename Windows EFI files]?" Deciding to read before choosing anything, I see that a problem may be raised because of this and I'm afraid to do anything. – Eyob Mar 14 '14 at 10:09
  • Never mind. I tried with "No" first and there was no changes. I tried with "Yes" and it worked, albeit with a few changes on the GRUB menu entries. Thanks a lot! – Eyob Mar 14 '14 at 11:29