Public bug reported:
When secure boot is enabled on an EFI system, it is not possible to
display background images in TGA format because the tga module is not
pre-loaded by the signed grubx64.efi binary and it is not possible to
insmod the module in a secure boot environment.
The jpeg and png modules are pre-loaded and it is possible to display
background images in those formats.
Since the backgrounds in the grub2-splashimages package are distributed
as TGA images I believe this should be considered a bug.
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: grub-efi-amd64-signed 1.93+2.02-2ubuntu8
ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
Uname: Linux 4.15.0-20-generic x86_64
ApportVersion: 2.20.9-0ubuntu7
Architecture: amd64
CurrentDesktop: KDE
Date: Fri May 4 11:51:07 2018
InstallationDate: Installed on 2018-05-02 (1 days ago)
InstallationMedia: Kubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
SourcePackage: grub2-signed
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: grub2-signed (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug bionic
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https://bugs.launchpad.net/bugs/1769011
Title:
The signed binary grubx64.efi does not include the tga module
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