noauto option ignored in /etc/fstab?

[Josef Wolf]

On Fri, Dec 01, 2017 at 10:14:18AM -0500, Tom H wrote:
> On Fri, Dec 1, 2017 at 5:36 AM, Josef Wolf <jw at raven.inka.de> wrote:
> > On Fri, Dec 01, 2017 at 05:12:58AM -0500, Tom H wrote:
> >> On Fri, Dec 1, 2017 at 2:50 AM, Josef Wolf <jw at raven.inka.de> wrote:
> >>>
> >>> I have the following line in /etc/fstab:
> >>>
> >>> UUID=XXXX-XXXX-XXXX-XXXX /boot ext4 noauto,relatime 0 2
> >>>
> >>> The noauto option should prevent the fs to be mounted during boot.
> >>>
> >>> That worked great in every distro I have touched in the last 20 years.
> >>>
> >>> But since I reinstalled this box with 16.04 LTS, this FS is mounted
> >>> during boot.
> >>>
> >>> Any ideas what causes this FS to be mounted during boot?
> >>
> >> Is this an EFI system?
> >>
> >> If it is, you'll have to set "/boot/efi" as "noauto" too.
> >
> > Before the reinstall, I had 14.04 with EFI and everything worked fine.
> >
> > The the disk failed. I reinstalled 16.04 WITHOUT EFI.
> >
> > Thus, no. There's no /boot/efi anymore on this system.
> 
> Here's the output from my laptop before and after adding "noauto" to
> the "/boot" line in "/etc/fstab" ("/boot" is my EFI partition). It
> works. You must have misconfigured something or hit a bug.

Well, it might work for you, but it doesn't work for me...

So, how do I find out what's the cause?

-- 
Josef Wolf
jw at raven.inka.de