just crash !!!!!!!!!

[MORIAU Florent]

v

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: ubiquity 2.18.8
ProcVersionSignature: Ubuntu 3.13.0-32.57-lowlatency 3.13.11.4
Uname: Linux 3.13.0-32-lowlatency x86_64
ApportVersion: 2.14.1-0ubuntu3.2
Architecture: amd64
CasperVersion: 1.340
Date: Sat Jan 10 21:27:50 2015
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntustudio.seed boot=casper only-ubiquity quiet splash --
LiveMediaBuild: Ubuntu-Studio 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.1)
ProcEnviron:
 LANGUAGE=fr_FR.UTF-8
 TERM=linux
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=fr_FR.UTF-8
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

[Ubuntu Foundations Team Bug Bot (crichton)]

Exception during installation:
Jan 10 20:27:08 ubuntu-studio /plugininstall.py: Traceback (most recent call last):
Jan 10 20:27:08 ubuntu-studio /plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 1770, in <module>
Jan 10 20:27:08 ubuntu-studio /plugininstall.py: install.run()
Jan 10 20:27:08 ubuntu-studio /plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 78, in wrapper
Jan 10 20:27:08 ubuntu-studio /plugininstall.py: func(self)
Jan 10 20:27:08 ubuntu-studio /plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 241, in run
Jan 10 20:27:08 ubuntu-studio /plugininstall.py: self.configure_bootloader()
Jan 10 20:27:08 ubuntu-studio /plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 1026, in configure_bootloader
Jan 10 20:27:08 ubuntu-studio /plugininstall.py: "GrubInstaller failed with code %d" % ret)
Jan 10 20:27:08 ubuntu-studio /plugininstall.py: ubiquity.install_misc.InstallStepError: GrubInstaller failed with code 1
Jan 10 20:27:08 ubuntu-studio /plugininstall.py: