noauto option ignored in /etc/fstab?

[Josef Wolf]

Hello,

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?

-- 
Josef Wolf
jw at raven.inka.de