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I'm running Ubuntu 18.04 alongside Windows 10 in a dual-boot. I was used to selecting what OS I can boot in the GRUB menu at startup.

Yesterday GRUB was upgraded to patch the Boot Hole security. Now the GRUB menu don't show, and the boot goes straight to Windows 10...

I already tried the following on Windows 10, but without success :

bcdedit /set {bootmgr} path \EFI\ubuntu\grubx64.efi

Anyone facing the same can help?

PS: I'm using UEFI

Eduardo Baitello
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    Does this answer your question? [Can't boot into Ubuntu in Windows 10 / Ubuntu dual boot](https://askubuntu.com/questions/708247/cant-boot-into-ubuntu-in-windows-10-ubuntu-dual-boot) – karel Jul 31 '20 at 12:07
  • Use boot-repair in live disk – Akshat Zala Jul 31 '20 at 12:50
  • It's worth checking the Boot Order in the UEFI/BIOS settings. Booting straight to Windows can occasionally be as simple as the Ubuntu boot option being below the Windows option, so it boots Windows first instead of Grub. Not sure why it would have changed with a Grub update but it's fairly easy to check, just in case. – pHeLiOn Jul 31 '20 at 14:25

1 Answers1

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I tried to inspect my BIOS setup. I didn't change anything, and I even used the option "discard changes" to exit. After exiting the setup, the GRUB menu magically showed up.

I was able to select Ubuntu, boot it, and then run:

sudo update-grub

This fixed the issue; new reboots are showing the GRUB menu again.

Eduardo Baitello
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