Public bug reported:
I just ran into this when upgrading a xenial system to grub2. Problem
is known and fixed in grub2 2.04-4 in Debian. Patch needs to be
backported to groovy, focal, bionic and xenial.
This is what it looks like (or visit the Debian bug):
# upgrade-from-grub-legacy
[...]
Found initrd image: /boot/initrd.img-3.13.0-169-generic
done
dpkg-maintscript-helper: error: environment variable DPKG_MAINTSCRIPT_NAME is
required
# echo $?
1
** Affects: grub2 (Ubuntu)
Importance: Undecided
Status: Confirmed
** Affects: grub2 (Debian)
Importance: Unknown
Status: Unknown
** Tags: bionic focal groo patch xenial
** Changed in: grub2 (Ubuntu)
Status: New => Confirmed
** Bug watch added: Debian Bug tracker #943387
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=943387
** Also affects: grub2 (Debian) via
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=943387
Importance: Unknown
Status: Unknown
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https://bugs.launchpad.net/bugs/1879496
Title:
upgrade-from-grub-legacy: environment variable DPKG_MAINTSCRIPT_NAME
is required
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