ubuntu installation fails with "grub install dummy" failed

[Arno Waschk]

I tried just plain installation of a recent 14.04 nightly build which had worked fine on another machine. Now it fails without giving me any further explanations than that "grub instll dummy" failed. Who is "dummy"?

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: ubiquity 2.17.3
ProcVersionSignature: Ubuntu 3.13.0-5.20-generic 3.13.0
Uname: Linux 3.13.0-5-generic x86_64
ApportVersion: 2.13.1-0ubuntu1
Architecture: amd64
CasperVersion: 1.336ubuntu1
Date: Wed Mar 12 11:36:40 2014
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi file=/cdrom/preseed/ubuntu-gnome.seed boot=casper only-ubiquity quiet splash --
LiveMediaBuild: Ubuntu-GNOME 14.04 "Trusty Tahr" - Alpha amd64 (20140121.1)
ProcEnviron:
 LANGUAGE=de_DE.UTF-8
 TERM=linux
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=de_DE.UTF-8
SourcePackage: grub-installer
UpgradeStatus: No upgrade log present (probably fresh install)