[Bug 1873008] Re: package lubuntu-grub-theme (not installed) failed to install/upgrade: error creating symbolic link './boot/grub/themes/lubuntu-grub-theme/icons/ubuntu.png': Operation not permitted

[System Admin]

After removing the bind mount, copying the theme to the /boot/grub, re-
establishing the bind mount, copying the file rather than using a
symbolic link for the file, and then finally configuring grub to use the
theme... it is not that useful for ZFS installations. Unfortunately it
truncates menu options with important information for the for the ZFS
snapshot history, like date and time.

Maybe if the grub resolution is increased it would work better?

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Title:
  package lubuntu-grub-theme (not installed) failed to install/upgrade:
  error creating symbolic link './boot/grub/themes/lubuntu-grub-
  theme/icons/ubuntu.png': Operation not permitted

Status in lubuntu-artwork package in Ubuntu:
  Confirmed
Status in ubiquity package in Ubuntu:
  Triaged

Bug description:
  I have tried to install lubuntu-desktop meta and the lubuntu-grub-theme (current and the previous version 20.04.2) package individually.
  I have also removed snapd in the event this was a snapd permissions issue.
  The error is still encountered.

  See: Bug 1872978

  ProblemType: Package
  DistroRelease: Ubuntu 20.04
  Package: lubuntu-grub-theme (not installed)
  ProcVersionSignature: Ubuntu 5.4.0-21.25-generic 5.4.27
  Uname: Linux 5.4.0-21-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  ApportVersion: 2.20.11-0ubuntu26
  AptOrdering:
   lubuntu-grub-theme:amd64: Install
   NULL: ConfigurePending
  Architecture: amd64
  CasperMD5CheckResult: skip
  Date: Wed Apr 15 08:33:49 2020
  DpkgTerminalLog:
   Preparing to unpack .../lubuntu-grub-theme_20.04.2_all.deb ...
   Unpacking lubuntu-grub-theme (20.04.2) ...
   dpkg: error processing archive /home/support/Downloads/lubuntu-grub-theme_20.04.2_all.deb (--unpack):
    error creating symbolic link './boot/grub/themes/lubuntu-grub-theme/icons/ubuntu.png': Operation not permitted
  ErrorMessage: error creating symbolic link './boot/grub/themes/lubuntu-grub-theme/icons/ubuntu.png': Operation not permitted
  InstallationDate: Installed on 2020-04-14 (0 days ago)
  InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Beta amd64 (20200402)
  Python3Details: /usr/bin/python3.8, Python 3.8.2, python3-minimal, 3.8.2-0ubuntu2
  PythonDetails: N/A
  RelatedPackageVersions:
   dpkg 1.19.7ubuntu3
   apt  2.0.2
  SourcePackage: lubuntu-artwork
  Title: package lubuntu-grub-theme (not installed) failed to install/upgrade: error creating symbolic link './boot/grub/themes/lubuntu-grub-theme/icons/ubuntu.png': Operation not permitted
  UpgradeStatus: No upgrade log present (probably fresh install)

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