grub-installer crashes in efi mode without network connection

[Felix Schoppe]

I experienced this bug when installing Ubuntu 20.04 with EFI. I am able to reproduce this bug on other computers. This bug only occurs when I install Ubuntu without network connection. When the computer is connected to a network this bug does not occur. I checked this on several computers and I was able to reproduce it.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: ubiquity 20.04.15.2
ProcVersionSignature: Ubuntu 5.4.0-45.49-generic 5.4.55
Uname: Linux 5.4.0-45-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.8
Architecture: amd64
CasperMD5CheckResult: pass
CasperVersion: 1.445.1
CurrentDesktop: ubuntu:GNOME
Date: Mon Sep 7 20:41:37 2020
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed auto=true priority=critical locale=de_DE boot=casper automatic-ubiquity initrd=/casper/initrd quiet splash noprompt noshell ---
LiveMediaBuild: Ubuntu 20.04.0 2020.09.06 amd64 "Custom Focal Fossa" (20200906)
ProcEnviron:
 LANGUAGE=de_DE.UTF-8
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=de_DE.UTF-8
 LC_NUMERIC=C.UTF-8
SourcePackage: grub-installer
UpgradeStatus: No upgrade log present (probably fresh install)

[Felix Schoppe (feschoppe)]

Probably, this bug is due to my customized image. I customized this image with cubic. So, I am sorry if this is not really a bug. Anyway I can solve this problem with connecting the computer to the internet when installing ubuntu.

[Felix Schoppe (feschoppe)]

I have another remark: This bug does not happen when I install in BIOS mode (even without network connection).