Ubuntu – How to recover EFI boot


I have a dell 15R notebook that used to work very well with windows 10 and ubuntu 16.04.

Today after an apparently normal update the ubuntu desktop became unresponsible than I have to turn it off using power button.

after that I tried to boot again and then I got a bad surprise. it failed. šŸ™

Now the boot menu is not appearing anymore, it is booting directly into windows

could someone give me a help, please?

after trying Boot Repair tool the machine have boot into the Windows 10 directly.

The I turn it off and on pressing F12.

In the boot page I saw that Ubuntu and Windows are there and the mode if EFI Secure Off

Fortunately I was able to boot ubuntu selecting it in the menu. and did some backup šŸ™‚

The strange is that grub menu that was presented is full of new entries some related to EFI.

The link for the Boot Repair report is http://paste2.org/MPhXHdbP (before) and http://paste2.org/n6v0XDZM

Any idea ?

Best Answer

You need to repair the GRUB. Do the following

Boot using a Live USB/CD of Ubuntu. UseĀ Boot RepairĀ to fix the problem.

After booting with Live USB/CD, run following command in terminal:

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

UseĀ Recomended Repair. This will install GRUB back :) screenshot of boot-repair

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