18.04 installation with internet access results in GRUB minimal BASH-like interface with no boot entries

Bug #1781042 reported by Devin Shoemaker on 2018-07-10
This bug affects 3 people
Affects Status Importance Assigned to Milestone
ubiquity (Ubuntu)

Bug Description

After installing Ubuntu 18.04, while the destination PC has internet access, the installation results in an unbootable state where you cannot get passed the GRUB minimal BASH-like interface. This occurs whether a "normal" or "minimal" install is selected, "download updates" or not, and "third party packages" or not. However, if all internet access is removed (no WiFi or ethernet) then the installer works, and I an boot into Ubuntu. I suspect that the installer downloads updates for Ubiquity or GRUB if possible, but I am not for sure. There are a number of people reporting this issue since yesterday as well.


I also have a Boot-Repair BootInfo summary here: http://paste.ubuntu.com/p/PwWVWnN6FB/
And logs from a failed attempt at Boot-Repair GRUB repair: http://paste.ubuntu.com/p/XwWDxf4xt5/

oldfred (oldfred) wrote :

Seems related to this bug.
Ubuntu 18.10 Cosmic installed /EFI/grub

As update during install creates /EFI/grub like in above install.
But some users manually boot into Ubuntu & update grub and it works.

manual boot:
grub> set root=(hd0,gpt8) #where gpt8 in example is ext4 partition with ubuntu.
grub> configfile /boot/grub/grub.cfg
$ sudo apt-get install grub-efi-amd64
$ sudo update-grub

or it seems Ubiquity installs a different version of grub during install than an update once booted installs?

Launchpad Janitor (janitor) wrote :

Status changed to 'Confirmed' because the bug affects multiple users.

Changed in ubiquity (Ubuntu):
status: New → Confirmed
Peter Sanchez (petersanchez) wrote :

I have the same thing. Brand new laptop, Lenovo X1 Carbon 6th gen. I have a post with a ton of detail here:


For quick reference, my boot-repair log is here:


Also for reference, the chatter in #ubuntu / freenode is full of people with the same issue.

Lyndon Shi (lynshi) wrote :

I had the same issue while setting up a dual boot with Windows 10 on an ASUS ZenBook UX430UA-DH74. After installing Ubuntu and rebooting I was presented with the grub command prompt. Removing Ubuntu and reinstalling with no internet connection fixed this bug.

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