Comment 41 for bug 1258597

I'm on artful (17.10) and it happens to me. It was a new installation and I haven't edited any grub files...

grub version:
grub2:
  Installed: (none)
  Candidate: 2.02~beta3-4ubuntu7
  Version table:
     2.02~beta3-4ubuntu7 500
        500 http://it-mirrors.evowise.com/ubuntu artful/universe amd64 Packages
grub2-common:
  Installed: 2.02~beta3-4ubuntu7
  Candidate: 2.02~beta3-4ubuntu7
  Version table:
 *** 2.02~beta3-4ubuntu7 500
        500 http://it-mirrors.evowise.com/ubuntu artful/main amd64 Packages
        100 /var/lib/dpkg/status

/etc/default/grub contents: http://pastebin.ubuntu.com/26176041/
There is no /etc/default/grub.d directory in my system

sudo update-grub
Generating grub configuration file ...
Warning: Setting GRUB_TIMEOUT to a non-zero value when GRUB_HIDDEN_TIMEOUT is set is no longer supported.
Found linux image: /boot/vmlinuz-4.13.0-19-generic
Found initrd image: /boot/initrd.img-4.13.0-19-generic
Found linux image: /boot/vmlinuz-4.13.0-17-generic
Found initrd image: /boot/initrd.img-4.13.0-17-generic
Found memtest86+ image: /boot/memtest86+.elf
Found memtest86+ image: /boot/memtest86+.bin
done