grub-efi-amd64 n'a pas pu etre installé dans /target/.

[debroise]

En l'absence du programme de démarrage GRUB dans/target/ le système installé ne pourra pas démarrer

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: ubiquity 17.10.10
ProcVersionSignature: Ubuntu 4.13.0-16.19-generic 4.13.4
Uname: Linux 4.13.0-16-generic x86_64
ApportVersion: 2.20.7-0ubuntu3
Architecture: amd64
CasperVersion: 1.387
Date: Wed Dec 27 14:58:26 2017
LiveMediaBuild: Xubuntu 17.10 "Artful Aardvark" - Release amd64 (20171017.1)
ProcEnviron:
 LANGUAGE=fr_FR.UTF-8
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=fr_FR.UTF-8
 LC_NUMERIC=C.UTF-8
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

[debroise (debroise)]

quelle solution envisageable ?

[debroise (debroise)]

il faut attendre une solution ou dois je arretter l'installation ?

[Phillip Susi (psusi)]

Your disk is currently partitioned to boot in bios mode, but you booted the installer in EFI mode. A warning message prompted you that this could be a problem and recommended performing a bios mode install instead, but you chose not to. You either need to perform the bios mode install, or partition the disk using GPT and set up an EFI system partition to install in EFI mode. This will be done for you if you choose the "use entire disk" guided install option.