Comment 14 for bug 1892526

This bug was fixed in the package grub2 - 2.04-1ubuntu26.4

---------------
grub2 (2.04-1ubuntu26.4) focal; urgency=medium

  * grub-install: cherry-pick patch from grub-devel to make grub-install
    fault tolerant. Create backup of files in /boot/grub, and restore them
    on failure to complete grub-install. LP: #1891680
  * postinst.in: do not exit successfully when failing to show critical
    grub-pc/install_devices_failed and grub-pc/install_devices_empty
    prompts in non-interactive mode. This enables surfacing upgrade errors
    to the users and/or automation. LP: #1891680
  * postinst.in: do not attempt to call grub-install upon fresh install of
    grub-pc because it it a job of installers to do that after fresh
    install. Fixup for the issue unmasked by above. LP: #1891680
  * grub-multi-install: fix non-interactive failures for grub-efi like it
    was fixed in postinst for grub-pc. LP: #1891680
  * postinst.in: Fixup postinst.in, to attempt grub-install upon explicit
    dpkg-reconfigure grub-pc. LP: #1892526

 -- Dimitri John Ledkov <email address hidden> Tue, 08 Sep 2020 11:24:35 +0100