Comment 12 for bug 1736080

On Thu, Dec 14, 2017 at 07:26:35AM -0000, Michele Polese wrote:
> This fixed it. Thank you very much!
> How's the /etc/fstab generated? Just to know if it's my fault for the wrong
> configuration or something was messed up during the setup.

The /etc/fstab is generated at boot time. The line that you had uncommented
for /boot/efi was definitely not produced by the Ubuntu installer - even if
there were a bug that produced such a line, the installation would have
failed with that line present and the system would not have been bootable
afterwards.

Also, your bug report shows an installation date of 2016-11-21, and 'ls -l
/etc/fstab' showed a timestamp on the file of November 28.

So this must have been modified after the installation. There is no
software in the standard Ubuntu install which would have made this change.
It's possible there is some package present in the Ubuntu universe archive
which would make such a change - if so, we would be interested to know what
package that was, so that we could fix it. Or you might have installed
third-party software which made this change, or followed some guide on the
Internet telling you to make such changes to the file.

If you do have any ideas how this happened, we would appreciate any
information you could provide, since it's a fairly common report that
/boot/efi is not correctly configured in /etc/fstab but we don't know why
users are ending up in this situation.