Hi, It seems it was a one-time bug.
Indeed, now I have modified my grub.cfg by hand, update-grub works fine and writes the good line with
linux ... root=/dev/mapper/sil_...2 no more linux ... root=/dev/sdb2 . Sorry for the inconvenience. Best regards, Quentin -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org