Monday, February 11, 2019

grub2 - Grub menu doesn't show during boot up

I have had ubuntu(currently 18.04) installed alongside windows(8.1) for over a year.
I was logged into Windows when I closed the lid and after sometime when I came back, "No bootable device found, press any key to reboot" was written on the screen. After reboot, windows opened up and the grub menu didn't appear. So I tried again and it didn't show yet again.



I do not know what is causing the problem or how to deal with it? What should I do? Is my data on Ubuntu partition lost?




EDIT: Opening boot manager by pressing F12 during boot shows these 4 options under " UEFI Boot" panel:




  • UEFI OnBoard LAN IPv4


  • UEFI OnBoard LAN IPv6


  • Windows Boot Manager


  • Ubuntu





Selecting Ubuntu option invokes the normal boot sequence and the grub menu appears. But this doesn't persists after reboot and boot directly advances to Windows. How do I make this permanent?

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