This trouble is due to my partition table which does not have a partition number 1. I fixed this bug by changing the extended partition from 4 to 1 (using fdisk). I still get a trouble (unknow chunk descriptor but this is an other trouble).
** Attachment added: "fdisk_sda.txt" https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/724839/+attachment/1870442/+files/fdisk_sda.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/724839 Title: package grub-pc 1.99~rc1-3ubuntu2 failed to install/upgrade: le sous- processus script post-installation installé a retourné une erreur de sortie d'état 1 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
