There is no way of knowing that your issue has anything to do do with
the ill-described issued in this report from 2 years ago, but whatever;
from your logs it is clear there is at least a bug in grub-installer.
Sep 1 17:27:22 ubuntu grub-installer: Skipping unreadable variable "Boot0000":
Input/output error
Sep 1 17:27:22 ubuntu grub-installer: Skipping unreadable variable "Boot0001":
Input/output error
Sep 1 17:27:22 ubuntu grub-installer: Skipping unreadable variable "Boot0004":
Input/output error
Sep 1 17:27:22 ubuntu grub-installer: Could not prepare Boot variable:
Input/output error
Sep 1 17:27:22 ubuntu grub-installer: Installation finished. No error reported.
Sep 1 17:27:22 ubuntu grub-installer: info: grub-install ran successfully
There was an error writing to the UEFI firmware variables, yet that
error was not propagated up to the installer to automatically generate a
failed install report.
Can you run sudo efibootmgr -v and post the output?
** Package changed: ubiquity (Ubuntu) => grub-installer (Ubuntu)
** Changed in: grub-installer (Ubuntu)
Status: Incomplete => New
** Summary changed:
- 15.10 - 17.04 fails to install GRUB on Microsoft Surface Pro 3 & 4
+ grub-installer fails to notice when setting EFI variables fails
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https://bugs.launchpad.net/bugs/1518426
Title:
grub-installer fails to notice when setting EFI variables fails
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